diff --git a/doc/2in66_bwr.jpg b/doc/2in66_bwr.jpg
new file mode 100644
index 0000000..87be8ea
Binary files /dev/null and b/doc/2in66_bwr.jpg differ
diff --git a/readme.md b/readme.md
index f4daf74..ca14df8 100644
--- a/readme.md
+++ b/readme.md
@@ -10,6 +10,10 @@ cc2640r2 电子标签改电子时钟固件.
     - cc2640r2l_2in13_ssd1680_250x122
     
     ![cc2640r2l_2in13_ssd1680_250x122](doc/2in13_bwr.jpg)
+ 
+    - cc2640r2l_2in66_ssd1680a_296x152
+    
+    ![cc2640r2l_2in66_ssd1680a_296x152](doc/2in66_bwr.jpg)
     
     - cc2640r2l_2in9_ssd1680a_296x128 **主要支持**
 
diff --git a/src/app/epd_2in66.c b/src/app/epd_2in66.c
new file mode 100644
index 0000000..32d7a7d
--- /dev/null
+++ b/src/app/epd_2in66.c
@@ -0,0 +1,603 @@
+// EPD 2in9 SSD1680A 296x152
+
+#define EPD_SSD1680A
+#define EPD_WIDTH   296
+#define EPD_HEIGHT  152
+
+#include <ti/drivers/PIN.h>
+#include <ti/sysbios/hal/Seconds.h> // Seconds_get
+//#include <ti/sysbios/knl/Task.h>    // System_sleep
+#include <xdc/runtime/System.h>     // snprintf
+#include <driverlib/aon_batmon.h>   // battery & temp
+#include <util.h>
+
+#include "epd_driver.h"
+
+#include <time.h>       // time
+#include <stdint.h>     // uint8_t 
+#include <string.h>     // memset
+
+// OBD
+#include "OneBitDisplay.h"
+#include "font16.h"
+#include "font24.h"
+#include "font24zh.h"
+#include "font80.h"
+
+// One Bit Display
+OBDISP obd = {0};
+
+extern const uint8_t ucMirror[];
+
+#if 0
+/*
+ * <int.frac> format size (3.8) bits.
+ * int for 0-3 voltage
+ * frac each means 1/256 of ONE voltage
+ */
+#define INTFRAC_V(x)    (x>>8)
+#define INTFRAC_mV(x)   ((x&0xff)*1000/256)
+#define INTFRAC2MV(x)   (INTFRAC_mV(x)+(INTFRAC_V(x)*1000))
+#endif
+
+// https://www.mdpi.com/2072-666X/12/5/578
+#define _VS(x) x<<6
+#define VSS  _VS(0b00)
+#define VSH1 _VS(0b01)
+#define VSL  _VS(0b10)
+#define VSH2 _VS(0b11)
+
+#if 0
+/*  the LUT lots of values are zeros, use a lite version instead.
+ */
+static const uint8_t lut_full_bwr[] = {
+//  0: LUTC x 7 
+//  RP      A           B           C           D           SRAB    SRCD
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+//  56: LUTR x 7
+    0x1,    VSL|0x2f,   0x0,        VSH2|0x3f,  0x0,        0x1,    0xa,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+//  112: LUTW x 7 
+    0x1,    VSL|0x3f,   0x0,        0x0,        0x0,        0x2,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+//  168: LUTB x 7
+    0x1,    VSH1|0x2f,  0x0,        0x0,        0x0,        0x1,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,
+
+// FR 
+    0x04, // 2: 50hz, 3: 75Hz, 4: 100Hz, 5: 125Hz
+
+// XON
+    0x0, 0x0,
+
+//  EOPT    VGH     VSH1    VSH2    VSL     VCOM
+//  3F      03      04                      2C
+//  22      -20v    15v     3v      -15v
+    0x22,   0x17,   0x41,   0x94,   0x32,   0x36    
+};
+
+static void EPD_2IN9_Lut(const unsigned char *lut)
+{
+    EPD_SSD_SendCommand(0x32);
+    for(int i=0; i<227; i++) {
+        EPD_SSD_SendData(lut[i]);
+    }
+
+    // gate voltage
+    EPD_SSD_SendCommand(0x3F);
+    EPD_SSD_SendData(*(lut+227));
+
+    EPD_SSD_SendCommand(0x03);
+    EPD_SSD_SendData(*(lut+228));
+
+    // source voltage
+    EPD_SSD_SendCommand(0x04);
+    EPD_SSD_SendData(*(lut+229));    // VSH
+    EPD_SSD_SendData(*(lut+230));    // VSH2
+    EPD_SSD_SendData(*(lut+231));    // VSL
+
+    EPD_SSD_SendCommand(0x2C);
+    EPD_SSD_SendData(*(lut+232));
+}
+#endif
+
+/* LUT lite is small than LUT used in SSD1680A, only 35 bytes.
+ * lut_lite_fast_bw is default lut for clock display,
+ * lut_lite_gray8_bwr is default lut for BLE display.
+ */
+#define LUT_LITE_LEN    35
+
+// LUT for clock fast display. (only black/white)
+static const uint8_t lut_lite_fast_bw[LUT_LITE_LEN] = {
+//  RP      A           B           C           D           SRAB    SRCD
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,            // LUTC
+    0x0,    VSL|0x3f,   0x0,        VSH2|0x3f,  0x0,        0x0,    0x0,            // LUTR
+    0x1,    VSL|0x3f,   0x0,        0x0,        0x0,        0x2,    0x0,            // LUTW
+    0x1,    VSH1|0x1f,  0x0,        0x0,        0x0,        0x1,    0x0,            // LUTB
+
+//  FR 
+    0x04, // 2: 50hz, 3: 75Hz, 4: 100Hz, 5: 125Hz
+
+//  EOPT    VGH     VSH1    VSH2    VSL     VCOM
+//  3F      03      04                      2C
+//  22      -20v    15v     3v      -15v
+    0x22,   0x17,   0x41,   0x94,   0x32,   0x36    
+};
+
+// LUT for BLE Gray display (8 steps)
+static const uint8_t lut_lite_gray8_bwr[LUT_LITE_LEN] = {
+//  RP      A           B           C           D           SRAB    SRCD
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,            // LUTC
+    0x1,    VSH2|0x3f,  0x0,        0x0,        0x0,        0x1,    0x0,            // LUTR 
+    0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,            // LUTW
+    0x1,    VSH1|0x03,  0x0,        0x0,        0x0,        0x1,    0x0,            // LUTB
+
+//  FR 
+    0x04, // 2: 50hz, 3: 75Hz, 4: 100Hz, 5: 125Hz
+
+//  EOPT    VGH     VSH1    VSH2    VSL     VCOM
+//  3F      03      04                      2C
+//  22      -20v    15v     3.0v      -15v
+    0x22,   0x17,   0x41,   0x94,   0x32,   0x36    
+};
+
+static void EPD_2IN9_Lut(const unsigned char *lut)
+{
+    // SSD1680A uses 233 LUT.
+
+    // 0, wareform setting
+    EPD_SSD_SendCommand(0x32);
+    for (int j=0; j<4; j++) {   // LUT0-3
+        // wave setting 
+        for (int i=0; i<7; i++) { 
+            EPD_SSD_SendData(lut[j*7+i]);
+        }
+        // no config 
+        for (int i=0; i<7*7; i++) {
+            EPD_SSD_SendData(0x00);
+        }
+    }
+    // 4 * (7+49) = 224
+    
+    // 224, FR
+    // 2: 50hz, 3: 75Hz, 4: 100Hz, 5: 125Hz
+    EPD_SSD_SendData(lut[28]);
+
+    // 225, XON
+    EPD_SSD_SendData(0x00);
+    EPD_SSD_SendData(0x00);
+
+    //  EOPT    VGH     VSH1    VSH2    VSL     VCOM
+    //  3F      03      04                      2C
+    //  22      -20v    15v     3v      -15v
+    //  0x22,   0x17,   0x41,   0x94,   0x32,   0x36    
+        
+    // 227, gate voltage
+    EPD_SSD_SendCommand(0x3F);
+    EPD_SSD_SendData(lut[29]);
+
+    EPD_SSD_SendCommand(0x03);
+    EPD_SSD_SendData(lut[30]);
+
+    // 229, source voltage
+    EPD_SSD_SendCommand(0x04);
+    EPD_SSD_SendData(lut[31]);    // VSH
+    EPD_SSD_SendData(lut[32]);    // VSH2
+    EPD_SSD_SendData(lut[33]);    // VSL
+    
+    // 232, VCOM
+    EPD_SSD_SendCommand(0x2C);
+    EPD_SSD_SendData(lut[34]);
+}
+
+static void EPD_2IN9_Lut_ById(int idx)
+{
+    uint8_t buf[LUT_LITE_LEN];
+    const uint8_t *lut = buf;
+
+    int rc = EPD_SNV_LoadLut(idx, buf, LUT_LITE_LEN);
+    if (rc != SUCCESS) {
+        // load default if no lut found.
+        switch (idx) {
+            case 0:
+                lut = lut_lite_fast_bw;
+                break;
+            case 1:
+                lut = lut_lite_gray8_bwr;
+                break;
+            default:
+                lut = NULL;
+                break;
+        }
+    }
+
+    if (lut) {
+        EPD_2IN9_Lut(lut);
+    }
+}
+
+static void EPD_2IN9_SoftReset()
+{
+    EPD_SSD_SendCommand(0x12); // soft reset
+    EPD_SSD_WaitBusy(100);
+}
+
+static int8_t EPD_2IN9_ReadTemp()
+{
+    int8_t rc;
+    
+    //EPD_SSD_SendCommand(0x12); // soft reset
+    //EPD_SSD_WaitBusy(100);
+
+    // Border Waveform
+    EPD_SSD_SendCommand(0x3C);
+    EPD_SSD_SendData(0x05);
+
+    // Temperature sensor control
+    EPD_SSD_SendCommand(0x18);
+    EPD_SSD_SendData(0x80);       // 80: internal sensor 48: external sensor
+
+    // Display update control
+    EPD_SSD_SendCommand(0x22);
+    EPD_SSD_SendData(0xb1);   // full: 0xf7
+
+    // Master Activation
+    EPD_SSD_SendCommand(0x20);
+    EPD_SSD_WaitBusy(100);
+
+    // read temperature
+    EPD_SSD_SendCommand(0x1b);
+    rc = EPD_SSD_ReadData();
+
+    return rc;
+}
+
+static void EPD_2IN9_LoadImage(uint8_t *image, int size, uint8_t cmd)
+{
+    EPD_SSD_SendCommand(cmd);
+    for (int i = 0; i < size; i++) {
+        EPD_SSD_SendData(image[i]);
+    }
+}
+
+static void EPD_2IN9_BWR(int width, int height, int left, int top)
+{
+    // left up corner
+    int w0 = left;
+    int h0 = top/8;
+    
+    // right bottom corner
+    int w1 = w0 + width - 1;
+    int h1 = h0 + height/8 - 1;
+    
+    // soft reset
+    //EPD_SSD_SendCommand(0x12); 
+    //EPD_SSD_WaitBusy(100);
+
+    // Border Waveform
+    EPD_SSD_SendCommand(0x3C); 
+    EPD_SSD_SendData(0x05);
+
+    // Driver output control
+    EPD_SSD_SendCommand(0x01);
+    EPD_SSD_SendData(0x28);  // mux=0x128(296)
+    EPD_SSD_SendData(0x01);
+    EPD_SSD_SendData(0x01);  // gd=0, sm=0, tb=1
+    
+    EPD_SSD_SendCommand(0x11); //data entry mode
+    EPD_SSD_SendData(0x07);   // am=1, id=11
+
+    // Set RAM X Address Start/End
+    EPD_SSD_SendCommand(0x44);
+    EPD_SSD_SendData(h0 & 0xff);
+    EPD_SSD_SendData(h1 & 0xff);
+
+    // Set RAM Y Address Start/End
+    EPD_SSD_SendCommand(0x45); //set Ram-Y address start/end position
+    EPD_SSD_SendData(w0 & 0xff);
+    EPD_SSD_SendData(w0 >> 8);
+    EPD_SSD_SendData(w1 & 0xff);
+    EPD_SSD_SendData(w1 >> 8);
+    
+    // Temperature sensor control
+    EPD_SSD_SendCommand(0x18);
+    EPD_SSD_SendData(0x80);       // 80: internal sensor 48: external sensor
+}
+
+void EPD_2IN9_WriteRam(uint8_t *image, int width, int height, int left, int top, uint8_t is_red)
+{
+    // data size in bytes
+    int size = width*height/8;
+
+    // Set Ram X address
+    EPD_SSD_SendCommand(0x4E); 
+    EPD_SSD_SendData(top & 0xff);
+
+    // Set Ram Y address
+    EPD_SSD_SendCommand(0x4F); 
+    EPD_SSD_SendData(left & 0xff);
+    EPD_SSD_SendData(left >> 8);
+
+    const uint8_t reg = is_red ? 0x26 : 0x24;     // BW: 0x24, Red: 0x26 
+    if (image) {
+        EPD_2IN9_LoadImage(image, size, reg);
+    } else {
+        EPD_SSD_SendCommand(reg);
+        for (int i = 0; i < size; i++) {
+            EPD_SSD_SendData(is_red ? 0x00 : 0xff);
+        }
+    }
+}
+
+void EPD_2IN9_Display(uint8_t reg)
+{
+    EPD_SSD_SendCommand(0x22);
+    EPD_SSD_SendData(reg);
+    EPD_SSD_SendCommand(0x20);
+}
+
+void EPD_2IN9_Sleep(void)
+{
+    EPD_SSD_SendCommand(0x10);    //enter deep sleep
+    EPD_SSD_SendData(0x01);       // 01: mode 1, 11: mode 2
+}
+
+void EPD_2IN9_Clear(void)
+{
+    // wakeup EPD
+    EPD_SSD_Reset();
+
+    // soft reset
+    EPD_2IN9_SoftReset();
+
+    // clear
+    EPD_2IN9_BWR(EPD_WIDTH, EPD_HEIGHT, 0, 0);
+    EPD_2IN9_WriteRam(NULL, EPD_WIDTH, EPD_HEIGHT, 0, 0, 0);
+    EPD_2IN9_WriteRam(NULL, EPD_WIDTH, EPD_HEIGHT, 0, 0, 1);
+
+    // display 
+    EPD_2IN9_Display(0xf7);    // c7: by REG  f7: by OTP   b1: no display
+
+    // wait & sleep
+    EPD_SSD_WaitBusy(15 * 1000);
+    EPD_2IN9_Sleep();
+}
+
+void EPD_2IN9_Update_Clock(void)
+{
+    time_t now;
+    time(&now);
+
+    // adjust TZ offset
+    now += utc_offset_mins * 60;
+
+    // get localtime
+    struct tm *l = localtime(&now);
+
+    if (clock_last == l->tm_min) {
+        return;
+    }
+ 
+    // full update on first start and midnight.
+    bool full_upd = (clock_last > 60 || (l->tm_hour == 0 && l->tm_min == 0)) ? true : false;
+
+    // clock started.
+    clock_last = l->tm_min;
+
+    // wakeup EPD
+    EPD_SSD_Reset();
+
+    // create obd
+    char buf[32];
+    obdCreateVirtualDisplay(&obd, EPD_WIDTH, 128, epd_buffer);
+
+    // soft reset
+    EPD_2IN9_SoftReset();
+
+    // ==== PAGE 1 ====
+    obdFill(&obd, 0, 0);
+    
+    // date
+    System_snprintf(buf, 32, "%u-%02u-%02u", 1900+l->tm_year, l->tm_mon+1, l->tm_mday);
+    obdWriteStringCustom(&obd, (GFXfont *)&Dialog_plain_24, 2, 22, buf, 1);
+
+    // week
+#if 1       // in chinese
+    {
+        char fmt[] = {0x37, 0x38, 0x30 + l->tm_wday, '\0'};   // chinese week day 
+        obdWriteStringCustom(&obd, (GFXfont *)&Hei24pt, 158, 20, fmt, 1);
+    }
+#else 
+    const char *wstr[]={"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
+    System_snprintf(buf, 32, "%u-%02u-%02u %s", 1900+l->tm_year, l->tm_mon+1, l->tm_mday, wstr[l->tm_wday]);
+    obdWriteStringCustom(&obd, (GFXfont *)&Dialog_plain_24, 2, 22, buf, 1);
+#endif
+
+    // temp
+    epd_temperature = EPD_2IN9_ReadTemp();
+    const char fmt[] = {'%', '3', 'u', 0xb0, 'c', '\0'};   // degrees celsius
+    System_snprintf(buf, 32, fmt, epd_temperature);
+    obdWriteStringCustom(&obd, (GFXfont *)&Dialog_plain_24, 236, 22, buf, 1);
+
+    // time
+    System_snprintf(buf, 32, "%02d:%02d", l->tm_hour, l->tm_min);
+    obdWriteStringCustom(&obd, (GFXfont *)&DSEG7_Classic_Regular_80, 10, 123, buf, 1);
+
+    // endian and invent
+    for (int i=0; i<sizeof(epd_buffer); i++) {
+        uint8_t c = epd_buffer[i];
+        epd_buffer[i] = ~ucMirror[c];
+    }
+
+    // full update every 30 mins
+    EPD_2IN9_BWR(EPD_WIDTH, EPD_HEIGHT, 0, 0);
+    EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, 128, 0, 0, 0);
+    EPD_2IN9_WriteRam(NULL, EPD_WIDTH, 128, 0, 0, 1);
+
+    // ==== PAGE 2 ====
+    obdFill(&obd, 0, 0);
+
+    // BLE dev name
+    extern void getBleAdvName(char* buf);
+    getBleAdvName(buf);
+    obdWriteStringCustom(&obd, (GFXfont *)&Dialog_plain_16, 2, 24, buf, 1);
+
+    // battery voltage
+    uint8_t v = EPD_BATT_Percent(); 
+    System_snprintf(buf, 32, "%3u%%", v);
+    obdWriteStringCustom(&obd, (GFXfont *)&Dialog_plain_16, 250, 24, buf, 1);
+    
+    // endian and invent
+    for (int i=0; i<sizeof(epd_buffer); i++) {
+        uint8_t c = epd_buffer[i];
+        epd_buffer[i] = ~ucMirror[c];
+    }
+
+    //EPD_2IN9_BWR(EPD_WIDTH, 24, 0, 128);
+    EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, 24, 0, 128/8, 0);
+    EPD_2IN9_WriteRam(NULL, EPD_WIDTH, 24, 0, 128/8, 1);
+
+    // load lut 
+    if (!full_upd) EPD_2IN9_Lut_ById(0);
+
+    // show
+    EPD_2IN9_Display(full_upd ? 0xf7 : 0xc7);    // c7: by REG  f7: by OTP   b1: no display
+    //need_sleep = 1;
+
+    EPD_SSD_WaitBusy(15 * 1000);
+    EPD_2IN9_Sleep();
+    return;
+}
+
+void EPD_2IN9_Update_Image()
+{
+    //static uint8_t last_step = 0;
+    uint8_t step = epd_step;
+
+    switch (step) {
+        case EPD_CMD_CLR:
+            EPD_2IN9_Clear();
+            break;
+
+        case EPD_CMD_MODE:
+            EPD_2IN9_Clear();
+            break;
+
+        case EPD_CMD_RST: // reset
+            // wakeup EPD
+            EPD_SSD_Reset();
+            // soft reset
+            EPD_2IN9_SoftReset();
+            // ready BWR 
+            EPD_2IN9_BWR(EPD_WIDTH, EPD_HEIGHT, 0, 0);
+            //EPD_2IN9_Lut(lut_lite_gray8_bwr);
+            break;
+            
+        case EPD_CMD_BW: { // write BW ram
+            uint8_t top = epd_step_data[0];
+            if (top == 1) {
+                EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, 24, 0, 128/8, 0);
+            } else {
+                EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, 128, 0, 0, 0);
+            }
+            break;
+        }
+
+        case EPD_CMD_RED: { // write Red ram
+            uint8_t top = epd_step_data[0];
+            if (top == 1) {
+                EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, 24, 0, 128/8, 1);
+            } else {
+                EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, 128, 0, 0, 1);
+            }
+            break;
+        }
+
+        case EPD_CMD_FILL: { // write ram with color
+            uint8_t color = epd_step_data[0];
+            if (color == 1) {   // red
+                memset(epd_buffer, 0xff, EPD_WIDTH*EPD_HEIGHT/8);
+                EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, EPD_HEIGHT, 0, 0, 1);
+            } else {
+                memset(epd_buffer, 0, EPD_WIDTH*EPD_HEIGHT/8);
+                EPD_2IN9_WriteRam(epd_buffer, EPD_WIDTH, EPD_HEIGHT, 0, 0, 0);
+            }
+            break;
+        }
+
+        case EPD_CMD_DP: { // master
+            // display lut select
+            uint8_t dpm = epd_step_data[0];
+            if (dpm == 1) { // lut1
+                EPD_2IN9_Lut_ById(0);
+            } else if (dpm == 2) {  // lut2
+                EPD_2IN9_Lut_ById(1);
+            } else if (dpm == 3) {  // lut3
+                EPD_2IN9_Lut_ById(2);
+            } else if (dpm == 0xff) {   // user ble lut
+                EPD_2IN9_Lut(ble_data);
+            }
+            
+            // otherwise using full lut.
+            EPD_2IN9_Display(dpm ? 0xc7: 0xf7);    // fast display
+            EPD_SSD_WaitBusy(15 * 1000);
+            EPD_2IN9_Sleep();
+            break;
+        }
+    }
+
+    // done
+    if (step == epd_step) {
+        epd_step = EPD_CMD_NC;
+    }
+}
+
+int EPD_SSD_Update(void)
+{
+    if (epd_mode == EPD_MODE_IMG) {
+        EPD_2IN9_Update_Image();
+        // stop tick clock
+        return 0;
+    }
+    // default mode
+    EPD_2IN9_Update_Clock();
+    // need tick clock
+    return 1;
+}
+
+void EPD_SSD_Init(void)
+{
+    EPD_SSD_Reset();
+
+    // if the rtc ahead 10 seconds per day (24 hours)
+    // ICALL still using 0x8000 (32768 ticks) for 1 seconds, 
+    // (0x8000 + x) / 0x8000 = (24 * 3600) / (24 * 3600 - 10)
+    // 32768 * 10 / (24 * 3600) = 3.793
+    RTC_SetCollaborate(epd_rtc_collab);
+}
+
diff --git a/src/app/epd_driver.c b/src/app/epd_driver.c
index 6ce558d..998f07c 100644
--- a/src/app/epd_driver.c
+++ b/src/app/epd_driver.c
@@ -318,6 +318,10 @@ int8_t RTC_GetCollaborate( void )
 
 #include "epd_2in9_bw.c"
 
+#elif defined(EPD_2IN66_SSD1680A)
+
+#include "epd_2in66.c"
+
 #else
 
 #error "EPD not support."
@@ -372,23 +376,25 @@ void EPD_Command(const uint8_t *cmd, int cmd_len)
 
         // write BW ram
         case EPD_CMD_BW:
+            epd_step_data[0] = cmd[1];      // top
             need_update = 1;
             break;
 
         // write RED ram
         case EPD_CMD_RED:
+            epd_step_data[0] = cmd[1];      // top
             need_update = 1;
             break;
 
         // Display
         case EPD_CMD_DP:
-            epd_step_data[0] = cmd[1];
+            epd_step_data[0] = cmd[1];      // lut
             need_update = 1;
             break;
 
         // fill ram with color
         case EPD_CMD_FILL:
-            epd_step_data[0] = cmd[1];
+            epd_step_data[0] = cmd[1];      // color
             need_update = 1;
             break;
 
@@ -494,7 +500,7 @@ void EPD_Init()
     LED_Blink(EPD_LED1_PIN, 10);
 
     // test LUT size, different EPD has different LUT size.
-    //lut_size = EPD_SSD_LutDetect();
+    lut_size = EPD_SSD_LutDetect();
 
 #if 0
     uint8_t buf[16] = {'a', 'b', 'c', 'd', };
diff --git a/tirtos/ccs/cc2640r2_2in66_ssd1680a_296x152.projectspec b/tirtos/ccs/cc2640r2_2in66_ssd1680a_296x152.projectspec
new file mode 100644
index 0000000..f7ff3a0
--- /dev/null
+++ b/tirtos/ccs/cc2640r2_2in66_ssd1680a_296x152.projectspec
@@ -0,0 +1,260 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<projectSpec>
+    <import spec="cc2640r2_stack_library.projectspec"/>
+    <project
+        name="cc2640r2_2in66_ssd1680a_296x152_app"
+        device="CC2640R2F"
+        cgtVersion="16.9"
+        connection="common/targetdb/connections/TIXDS110_Connection.xml"
+        toolChain="TI"
+        linkerCommandFile="cc26xx_app.cmd"
+        preBuildStep=""
+        postBuildStep="${CG_TOOL_HEX} -order MS --memwidth=8 --romwidth=8 --intel -o ${ProjName}.hex ${ProjName}.out"
+        description=""
+        launchWizard="false"
+        references="cc2640r2_stack_library"
+    >
+
+        <!-- Project properties -->
+        <property name="type" value="rtsc"/>
+        <property name="products" value=""/>
+        <property name="xdcToolsVersion" value="3.50.02.20"/>
+        <property name="target" value="ti.targets.arm.elf.M3"/>
+        <property name="platform" value="ti.platforms.simplelink:CC2640R2F"/>
+        <property name="buildProfile" value="release"/>
+        <property name="isHybrid" value="true"/>
+        <property name="configuroOptions" value="--compileOptions ${COMPILER_FLAGS} --xdcpath ${SRC_BLE_DIR}/../../../source;${SRC_BLE_DIR}/../../../kernel/tirtos/packages;${SRC_BLE_DIR}"/>
+
+        <configuration
+            name="FlashROM_StackLibrary"
+            compilerBuildOptions="
+            --cmd_file=${SRC_BLE_DIR}/config/build_components.opt
+            --cmd_file=${SRC_BLE_DIR}/config/factory_config.opt
+            --cmd_file=${WORKSPACE_LOC}/cc2640r2_stack_library/TOOLS/build_config.opt
+            -mv7M3 -O2 --opt_for_speed=0 --code_state=16 --abi=eabi -me -g --c99 --gcc --gen_func_subsections=on --display_error_number --diag_wrap=off
+            -DDeviceFamily_CC26X0R2
+            -DCACHE_AS_RAM
+            -DBOARD_DISPLAY_USE_LCD=0
+            -DBOARD_DISPLAY_USE_UART=0
+            -DBOARD_DISPLAY_USE_UART_ANSI=1
+            -DEPD_2IN66_SSD1680A
+            -DCC2640R2_LAUNCHXL
+            -DCC26XX
+            -DCC26XX_R2
+            -DICALL_EVENTS
+            -DICALL_JT
+            -DICALL_LITE
+            -DICALL_MAX_NUM_ENTITIES=7
+            -DICALL_MAX_NUM_TASKS=4
+            -DICALL_STACK0_ADDR
+            -DPOWER_SAVING
+            -DRF_SINGLEMODE
+            -DSTACK_LIBRARY
+            -DTBM_ACTIVE_ITEMS_ONLY
+            -DUSE_ICALL
+            -DDisplay_DISABLE_ALL
+            -Dxdc_runtime_Assert_DISABLE_ALL
+            -Dxdc_runtime_Log_DISABLE_ALL
+            -I${PROJECT_LOC}/Application
+            -I${PROJECT_LOC}/Startup
+            -I${PROJECT_LOC}/PROFILES
+            -I${PROJECT_LOC}/Include
+            -I${CG_TOOL_ROOT}/include
+            -I${SRC_BLE_DIR}/controller/cc26xx_r2/inc
+            -I${SRC_BLE_DIR}/inc
+            -I${SRC_BLE_DIR}/rom
+            -I${SRC_BLE_DIR}/common/cc26xx
+            -I${SRC_BLE_DIR}/icall/inc
+            -I${SRC_BLE_DIR}/inc
+            -I${SRC_BLE_DIR}/target
+            -I${SRC_BLE_DIR}/hal/src/target/_common
+            -I${SRC_BLE_DIR}/hal/src/target/_common/cc26xx
+            -I${SRC_BLE_DIR}/hal/src/inc
+            -I${SRC_BLE_DIR}/heapmgr
+            -I${SRC_BLE_DIR}/icall/src/inc
+            -I${SRC_BLE_DIR}/osal/src/inc
+            -I${SRC_BLE_DIR}/services/src/saddr
+            -I${SRC_BLE_DIR}/services/src/sdata
+            -I${SRC_BLE_DIR}/../../../source/ti/devices/cc26x0r2"
+            linkerBuildOptions="
+            -l${SRC_BLE_DIR}/../../../source/ti/devices/cc26x0r2/driverlib/bin/ccs/driverlib.lib
+            -l${SRC_BLE_DIR}/../../../kernel/tirtos/packages/ti/dpl/lib/dpl_cc26x0r2.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/drivers/lib/drivers_cc26x0r2.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/drivers/rf/lib/rf_singleMode_cc26x0r2.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/display/lib/display.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/grlib/lib/grlib.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/mw/lcd/lib/lcd.aem3
+            -l${WORKSPACE_LOC}/cc2640r2_stack_library/FlashROM_Library/ble_r2.symbols
+            -l${WORKSPACE_LOC}/cc2640r2_stack_library/FlashROM_Library/lib_linker.cmd
+            -l${WORKSPACE_LOC}/cc2640r2_stack_library/FlashROM_Library/cc2640r2_stack_library.lib
+            -l${SRC_BLE_DIR}/common/cc26xx/ccs/cc26xx_app.cmd
+            -x
+            --define=CC26X0ROM=2
+            --define=CACHE_AS_RAM=1
+            --diag_suppress=16002-D
+            --diag_suppress=10247-D
+            --diag_suppress=10325-D
+            --diag_suppress=10229-D
+            --diag_suppress=16032-D"
+        />
+
+        <configuration
+            name="FlashROM_StackLibrary_RCOSC"
+            compilerBuildOptions="
+            --cmd_file=${SRC_BLE_DIR}/config/build_components.opt
+            --cmd_file=${SRC_BLE_DIR}/config/factory_config.opt
+            --cmd_file=${WORKSPACE_LOC}/cc2640r2_stack_library/TOOLS/build_config.opt
+            -mv7M3 -O4 --opt_for_speed=0 --code_state=16 --abi=eabi -me -g --c99 --gcc --gen_func_subsections=on --display_error_number --diag_wrap=off
+            -DDeviceFamily_CC26X0R2
+            -DBOARD_DISPLAY_USE_LCD=0
+            -DBOARD_DISPLAY_USE_UART=0
+            -DBOARD_DISPLAY_USE_UART_ANSI=1
+            -DCC2640R2_LAUNCHXL
+            -DCC26XX
+            -DCC26XX_R2
+            -DICALL_EVENTS
+            -DICALL_JT
+            -DICALL_LITE
+            -DICALL_MAX_NUM_ENTITIES=7
+            -DICALL_MAX_NUM_TASKS=4
+            -DICALL_STACK0_ADDR
+            -DPOWER_SAVING
+            -DRF_SINGLEMODE
+            -DSTACK_LIBRARY
+            -DTBM_ACTIVE_ITEMS_ONLY
+            -DUSE_ICALL
+            -DUSE_RCOSC
+            -DDisplay_DISABLE_ALL
+            -Dxdc_runtime_Assert_DISABLE_ALL
+            -Dxdc_runtime_Log_DISABLE_ALL
+            -I${PROJECT_LOC}/Application
+            -I${PROJECT_LOC}/Startup
+            -I${PROJECT_LOC}/PROFILES
+            -I${PROJECT_LOC}/Include
+            -I${CG_TOOL_ROOT}/include
+            -I${SRC_BLE_DIR}/controller/cc26xx_r2/inc
+            -I${SRC_BLE_DIR}/inc
+            -I${SRC_BLE_DIR}/rom
+            -I${SRC_BLE_DIR}/common/cc26xx
+            -I${SRC_BLE_DIR}/common/cc26xx/rcosc
+            -I${SRC_BLE_DIR}/icall/inc
+            -I${SRC_BLE_DIR}/inc
+            -I${SRC_BLE_DIR}/target
+            -I${SRC_BLE_DIR}/hal/src/target/_common
+            -I${SRC_BLE_DIR}/hal/src/target/_common/cc26xx
+            -I${SRC_BLE_DIR}/hal/src/inc
+            -I${SRC_BLE_DIR}/heapmgr
+            -I${SRC_BLE_DIR}/icall/src/inc
+            -I${SRC_BLE_DIR}/osal/src/inc
+            -I${SRC_BLE_DIR}/services/src/saddr
+            -I${SRC_BLE_DIR}/services/src/sdata
+            -I${SRC_BLE_DIR}/../../../source/ti/devices/cc26x0r2"
+            linkerBuildOptions="
+            -l${SRC_BLE_DIR}/../../../source/ti/devices/cc26x0r2/driverlib/bin/ccs/driverlib.lib
+            -l${SRC_BLE_DIR}/../../../kernel/tirtos/packages/ti/dpl/lib/dpl_cc26x0r2.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/drivers/lib/drivers_cc26x0r2.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/drivers/rf/lib/rf_singleMode_cc26x0r2.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/display/lib/display.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/grlib/lib/grlib.aem3
+            -l${SRC_BLE_DIR}/../../../source/ti/mw/lcd/lib/lcd.aem3
+            -l${WORKSPACE_LOC}/cc2640r2_stack_library/FlashROM_Library/ble_r2.symbols
+            -l${WORKSPACE_LOC}/cc2640r2_stack_library/FlashROM_Library/lib_linker.cmd
+            -l${WORKSPACE_LOC}/cc2640r2_stack_library/FlashROM_Library/cc2640r2_stack_library.lib
+            -l${SRC_BLE_DIR}/common/cc26xx/ccs/cc26xx_app.cmd
+            -x
+            --define=CC26X0ROM=2
+            --diag_suppress=16002-D
+            --diag_suppress=10247-D
+            --diag_suppress=10325-D
+            --diag_suppress=10229-D
+            --diag_suppress=16032-D"
+        />
+
+        <pathVariable name="SDK_ROOT" path="C:\ti\simplelink_cc2640r2_sdk_1_40_00_45" scope="project"/>
+        <pathVariable name="EXAMPLE_BLE_ROOT" path="../.." scope="project"/>
+        <pathVariable name="SRC_BLE_DIR" path="${SDK_ROOT}/source/ti/ble5stack" scope="project"/>
+
+        <!-- Application Folder -->
+        <file path="EXAMPLE_BLE_ROOT/src/app/epd_2in66.c" openOnCreation="" excludeFromBuild="true" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/epd_driver.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/epd_driver.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/OneBitDisplay.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/OneBitDisplay.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/obd.inl" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font8.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font16.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font16zh.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font24.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font24zh.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font30.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font40.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font60.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font64.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/font80.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/task_ble.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/task_ble.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/task_epd.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/task_epd.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/common/cc26xx/util.c" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/common/cc26xx/util.h" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/common/cc26xx/rcosc/rcosc_calibration.c" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/common/cc26xx/rcosc/rcosc_calibration.h" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="Application" createVirtualFolders="true" applicableConfigurations="FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- Drivers/ECC Folder -->
+        <file path="SRC_BLE_DIR/common/cc26xx/ecc/ECCROMCC26XX.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Drivers/ECC" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/common/cc26xx/ecc/ECCROMCC26XX.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Drivers/ECC" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- Drivers/TRNG Folder -->
+        <file path="SRC_BLE_DIR/hal/src/target/_common/TRNGCC26XX.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Drivers/TRNG" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/hal/src/target/_common/TRNGCC26XX.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Drivers/TRNG" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- ICall Folder -->
+         <file path="SRC_BLE_DIR/icall/src/icall.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICall" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/src/inc/icall.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICall" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/inc/icall_addrs.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICall" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/src/icall_cc2650.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICall" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/src/icall_platform.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICall" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/src/icall_user_config.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICall" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- ICallBLE Folder -->
+        <file path="SRC_BLE_DIR/icall/app/ble_user_config.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICallBLE" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/inc/ble_user_config.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICallBLE" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/app/icall_api_lite.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICallBLE" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/icall/inc/icall_ble_apimsg.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="ICallBLE" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- Include Folder -->
+        <file path="SRC_BLE_DIR/inc/gap.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Include" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/profiles/roles/gapbondmgr.h" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="Include" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/inc/gapgattserver.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Include" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/inc/gatt.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Include" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/inc/hci.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Include" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/osal/src/inc/osal_snv.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Include" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- PROFILES Folder -->
+        <file path="SRC_BLE_DIR/profiles/dev_info/cc26xx/devinfoservice.c" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/profiles/dev_info/devinfoservice.h" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/inc/gatt_profile_uuid.h" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/host/gatt_uuid.c" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/inc/gatt_uuid.h" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/host/gattservapp_util.c" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/profiles/roles/cc26xx/peripheral.c" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/profiles/roles/cc26xx/peripheral.h" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/epd_service.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/epd_service.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="PROFILES" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- Startup Folder -->
+        <file path="EXAMPLE_BLE_ROOT/src/target/board.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Startup" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/target/CC2640R2_LAUNCHXL.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Startup" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/target/CC2640R2_LAUNCHXL.h" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Startup" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/tirtos/iar/config/ccfg_app_ble.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Startup" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary"/>
+        <file path="SRC_BLE_DIR/common/cc26xx/rcosc/ccfg_app_ble_rcosc.c" openOnCreation="" excludeFromBuild="false" action="copy" targetDirectory="Startup" createVirtualFolders="true" applicableConfigurations="FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/src/app/main.c" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="Startup" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+
+        <!-- TOOLS Folder -->
+        <file path="EXAMPLE_BLE_ROOT/tirtos/ccs/config/app_ble.cfg" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="TOOLS" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="SRC_BLE_DIR/common/cc26xx/ccs/cc26xx_app.cmd" openOnCreation="" excludeFromBuild="true" action="copy" targetDirectory="TOOLS" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+        <file path="EXAMPLE_BLE_ROOT/tirtos/ccs/config/ccs_compiler_defines.bcfg" openOnCreation="" excludeFromBuild="false" action="link" targetDirectory="TOOLS" createVirtualFolders="true" applicableConfigurations="FlashROM"/>
+        <file path="EXAMPLE_BLE_ROOT/tirtos/ccs/config/ccs_linker_defines.cmd" openOnCreation="" excludeFromBuild="true" action="link" targetDirectory="TOOLS" createVirtualFolders="true" applicableConfigurations="FlashROM, FlashROM_StackLibrary, FlashROM_StackLibrary_RCOSC"/>
+    </project>
+</projectSpec>
diff --git a/tools/cc2640r2_etag-2in66.html b/tools/cc2640r2_etag-2in66.html
new file mode 100644
index 0000000..c59aa50
--- /dev/null
+++ b/tools/cc2640r2_etag-2in66.html
@@ -0,0 +1,612 @@
+<html lang="zh-CN">
+<head>
+<style>
+  div {
+    padding: 12px;
+    margin: 2 auto;
+  }
+</style>  
+</head>
+
+
+<body>
+  <script>
+    let bleDevice;
+    let gattServer;
+    let Theservice;
+    let epdService;
+    let epochCharacter;
+
+    async function sleep(ms) {
+      await new Promise(resolve => setTimeout(resolve, ms));
+    }
+
+    async function doConnect() {
+      if (gattServer != null && gattServer.connected) {
+        if (bleDevice != null && bleDevice.gatt.connected)
+          bleDevice.gatt.disconnect();
+      }
+      else {
+        bleDevice = await navigator.bluetooth.requestDevice({
+          filters: [{ namePrefix: ['C26_'] }],
+          optionalServices: [
+            0xfff0,
+          ],
+          //acceptAllDevices: true 
+        });
+        await bleDevice.addEventListener('gattserverdisconnected', disconnect);
+        await connect();
+      }
+    }
+
+    async function connect() {
+      if (epochCharacter == null) {
+        info("Connect to " + bleDevice.name)
+        gattServer = await bleDevice.gatt.connect();
+        info('> Found GATT server');
+        epdService = await gattServer.getPrimaryService(0xfff0);
+        info('> Found EPD service');
+        epochCharacter = await epdService.getCharacteristic(0xfff1);
+        document.getElementById("btnConnect").innerHTML = 'Disconnect';
+        document.getElementById('etagFn').style.visibility = '';
+      }
+    }
+
+    function disconnect() {
+      bleDevice = null;
+      epdService = null;
+      epochCharacter = null;
+      info('Disconnected.');
+
+      document.getElementById("btnConnect").innerHTML = 'Connect';
+      document.getElementById('etagFn').style.visibility = 'hidden';
+    }
+
+    async function doSetTime() {
+      var epoch = Date.now() / 1000 | 0;
+      var buf = new ArrayBuffer(4);
+      var arr = new Uint32Array(buf);
+      arr[0] = epoch;
+      await epochCharacter.writeValueWithResponse(arr);
+      info("Write unix epoch: " + epoch);
+    }
+
+    async function doReadEtag() {
+      var host_epoch = Date.now() / 1000 | 0;
+
+      // read current time
+      var chr = await epdService.getCharacteristic(0xfff1);
+      var epoch = (await chr.readValue()).getUint32(0, 1);
+
+      // read time zone
+      var chr = await epdService.getCharacteristic(0xfff2);
+      var tz_min = (await chr.readValue()).getInt32(0, 1);
+      info(`# host time: ${host_epoch}, diff (${epoch - host_epoch}) seconds.`);
+      info(`# etag time: ${epoch}, tz: ${tz_min} minutes of UTC.`);
+
+      // battery
+      var chr = await epdService.getCharacteristic(0xfff3);
+      var batt = (await chr.readValue()).getUint16(0, 1);
+
+      // Temperature
+      var chr = await epdService.getCharacteristic(0xfff4);
+      var temp = (await chr.readValue()).getInt8(0, 1);
+      info(`# etag sensor: battery(${batt}mv), temperature(${temp}'C). `);
+
+      // RTC Collaborate
+      var chr = await epdService.getCharacteristic(0xfff5);
+      var rtc_collab = (await chr.readValue()).getInt8(0, 1);
+      info(`# rtc collab: ${rtc_collab} every 1 second.`);
+    }
+
+    async function doRtcCollab() {
+      var col = prompt("对 32.768kHz 晶振补偿频漂，走时快补偿负数，走时慢补偿正数。可选范围 (-8 ~ 8)", 0);
+      if (col == null || col < -8 || col > 8) return;
+      var chr = await epdService.getCharacteristic(0xfff5);
+      var buf = new ArrayBuffer(1);
+      var arr = new Int8Array(buf);
+      arr[0] = parseInt(col);
+      await chr.writeValueWithResponse(arr);
+      info(`write RTC collabration: ${col}`);
+    }
+
+    async function doTest() {
+      var chr = await epdService.getCharacteristic(0xfffe);
+      var buf = new ArrayBuffer(62);
+      var arr = new Int8Array(buf);
+      for (var i = 0; i < arr.length; i++) {
+        arr[i] = i % 8;
+      }
+      await chr.writeValueWithResponse(arr);
+      info(`> write ${arr.length} bytes.`)
+      //var out = await chr.readValue();
+      //console.log(out);
+    }
+
+    async function doCmd(cmd, data) {
+      const epdCmd = {
+        EPD_CMD_CLR: 1,
+        EPD_CMD_MODE: 2,
+        EPD_CMD_BUF: 3,
+        EPD_CMD_BUF_CONT: 4,
+        EPD_CMD_LUT: 5,
+        EPD_CMD_RST: 6,
+        EPD_CMD_BW: 7,
+        EPD_CMD_RED: 8,
+        EPD_CMD_DP: 9,
+        EPD_CMD_FILL: 10,
+        
+        EPD_CMD_BUF_PUT: 11,
+        EPD_CMD_BUF_GET: 12,
+        EPD_CMD_SNV_WRITE: 13,
+        EPD_CMD_SNV_READ: 14,
+
+        EPD_CMD_SAVE_CFG: 15,
+      };
+
+      var chr = await epdService.getCharacteristic(0xfffe);
+      switch (cmd) {
+        case 'read': {
+          var data = await chr.readValue();
+          return data;
+        }
+ 
+        case 'clr':
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_CLR]));
+          break;
+
+        case 'mode':
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_MODE, data == 'image'?0x01:0x00]));
+          break;
+
+        case 'buf':
+          for (var i = 0; i < data.length; i += 60) {
+            let arr = [(i == 0 ? epdCmd.EPD_CMD_BUF : epdCmd.EPD_CMD_BUF_CONT)];
+            arr.push(...data.slice(i, i + 60));
+            //console.log(arr);
+            await chr.writeValueWithResponse(Uint8Array.from(arr));
+            //info(`> buf at ${i} size ${arr.length}`)
+          }
+          break;
+
+        case 'lut':
+          let arr = [epdCmd.EPD_CMD_LUT];
+          arr.push(...data);
+          await chr.writeValueWithResponse(Uint8Array.from(arr));
+          break;
+
+        case 'rst':
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_RST]));
+          break;
+
+        case 'bw':
+          // write to bw ram
+          data = data || 0;
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_BW, data]));
+          break;
+
+        case 'red':
+          // write to bw ram
+          data = data || 0;
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_RED, data]));
+          break;
+
+        case 'fill':
+          // fill ram with black(0) or red(1)
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_FILL, data == 'red' ? 0x01:0x00]));
+          break;
+
+        case 'dp':
+          // show
+          let lut = 0;
+          switch (data) {
+            case 'gray8': 
+              lut = 2;
+              break;
+            case 'user': 
+              lut = 0xff;
+              break;
+            case 'full': 
+            default:
+              lut = 0; 
+          }
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_DP, lut]));
+          break;
+
+        case 'snv_read':
+          // SNV index, read length
+          console.log(`snv read ${data}`);
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_SNV_READ, ...data]));
+          break;
+ 
+        case 'snv_write':
+          // SNV index
+          console.log(`snv write ${data}`);
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_SNV_WRITE, data]));
+          break;
+        
+        case 'buf_get':
+          // buffer index
+          console.log(`buf get ${data}`);
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_BUF_GET, data]));
+          break;
+        
+        case 'buf_put':
+          // buffer index, data ...
+          console.log(`buf put ${data}`);
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_BUF_PUT, ...data]));
+          break;
+        
+        case 'save_cfg':
+          await chr.writeValueWithResponse(Uint8Array.from([epdCmd.EPD_CMD_SAVE_CFG]));
+          break;
+
+     }
+      info (`> epdCmd.${cmd} done.`)
+    }
+
+    async function doCmdRead(snvId, size) {
+      var out = [];
+      
+      // request SNV read
+      await doCmd('snv_read', [snvId, size]);
+
+      // pull data
+      for (var i=0; i<size; ) {
+        await doCmd('buf_get', i);
+        var data = new Uint8Array((await doCmd('read')).buffer);
+        if (data.byteLength == 0) {
+          break;
+        }
+        // first byte is the data index 
+        i += data.byteLength - 1;
+
+        // add data to out, except the first byte.
+        out.push(...data.slice(1));
+      }
+      return out;
+    }
+
+    let ram_bw = [];
+    let ram_red = [];
+    function doImageGrey(type) {
+      const canvas = document.getElementById('canvas');
+      ram_bw = canvas2grey8(canvas, 'bw');
+      ram_red = canvas2grey8(canvas, 'red');
+    }
+
+    var step = 0;
+    async function doUploadImageGray8() {
+      await doCmd('clr');
+      await sleep(15*1000);
+
+      doImageGrey();
+      for (var i = 0; i < 8; i++) {
+        await doCmd('rst');
+        await sleep(2000);
+        await doUploadImageRam8('bw');
+        await doUploadImageRam8('red');
+        await doCmd('dp', 'gray8');
+        await sleep(8000);
+        step++;
+      }
+      step = 0;
+      info('> Upload done.')
+    }
+    async function doUploadImage(type) {
+      if (type == 'gray8') {
+        await doUploadImageGray8();
+      } else {
+        await doCmd('rst');
+        await sleep(2000);
+        await doUploadImageRam2('bw');
+        await doUploadImageRam2('red');
+        await doCmd('dp', 'full');
+        await sleep(15*1000);
+      }
+    }
+
+    // for screen larger than 296x128, should split to pages.
+    async function doCmdBuffers(type, arr) {
+      let step = 296*128/8;
+      let page = 0;
+      for (var i = 0; i < arr.length; i += step) {
+        let buffer = [];
+        buffer.push(...arr.slice(i, i + step));
+        await doCmd('buf', buffer);
+        await doCmd(type, page++); 
+      }
+    }
+
+    async function doUploadImageRam2(type = 'bw') {
+      const canvas = document.getElementById('canvas');
+      var arr = canvas2bytes(canvas, type = type);
+      //await doCmd('buf', arr);
+      //await doCmd(type)
+      await doCmdBuffers(type, arr);
+    }
+
+    async function doUploadImageRam8(type = 'bw') {
+      var ram = type == 'bw' ? ram_bw : ram_red;
+
+      // grey byte to bit
+      var arr = [];
+      var buffer = [];
+      for (var x = 0; x < ram.length; x++) {
+        const n = ram[x] > step ? 1 : 0;
+        if (type == 'bw') {
+          buffer.push(n ? 0 : 1);
+        } else {
+          buffer.push(n ? 1 : 0);
+        }
+
+        if (buffer.length == 8) {
+          arr.push(parseInt(buffer.join(''), 2));
+          buffer = [];
+        }
+      }
+
+      info(`> write ram ${type} size ${arr.length}, step ${step}`);
+      console.log(arr);
+      //await doCmd('buf', arr);
+      //await doCmd(type)
+      await doCmdBuffers(type, arr);
+    }
+
+    function info(logTXT) {
+      var today = new Date();
+      var time = ("0" + today.getHours()).slice(-2) + ":" + ("0" + today.getMinutes()).slice(-2) + ":" + ("0" + today.getSeconds()).slice(-2) + " : ";
+      document.getElementById("log").innerHTML += time + logTXT + '<br>';
+      console.log(time + logTXT);
+      while ((document.getElementById("log").innerHTML.match(/<br>/g) || []).length > 10) {
+        var logs_br_position = document.getElementById("log").innerHTML.search("<br>");
+        document.getElementById("log").innerHTML = document.getElementById("log").innerHTML.substring(logs_br_position + 4);
+      }
+    }
+
+    async function load_image() {
+      const image_file = document.getElementById('image_file');
+      if (image_file.files.length > 0) {
+        const file = image_file.files[0];
+
+        const canvas = document.getElementById("canvas");
+        const ctx = canvas.getContext("2d");
+
+        const image = new Image();
+        image.src = URL.createObjectURL(file);
+        image.onload = function (event) {
+          URL.revokeObjectURL(this.src);
+          ctx.drawImage(image, 0, 0, image.width, image.height, 0, 0, canvas.width, canvas.height);
+          //convert_dithering()
+        }
+      }
+    }
+
+    function clear_canvas() {
+      if (confirm('确认清除屏幕?')) {
+        const canvas = document.getElementById('canvas');
+        const ctx = canvas.getContext("2d");
+        ctx.fillStyle = 'white';
+        ctx.fillRect(0, 0, canvas.width, canvas.height);
+      }
+    }
+
+    function canvas2bytes(canvas, type = 'bw') {
+      const ctx = canvas.getContext("2d");
+      const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
+
+      const arr = [];
+      let buffer = [];
+
+      for (let y = 0; y < canvas.height; y += 8) {
+        for (let x = 0; x < canvas.width; x++) {
+          for (let a = 0; a < 8; a++) {
+            const i = (canvas.width * (y + a) + x) * 4;
+            if (type !== 'red') {
+              // 1 for white, 0 for black
+              // black : 0, 0, 0
+              buffer.push(imageData.data[i] === 0 && imageData.data[i + 1] === 0 && imageData.data[i + 2] === 0 ? 0 : 1);
+            } else {
+              // 1 for red, 0 for white
+              buffer.push(imageData.data[i] > 0 && imageData.data[i + 1] === 0 && imageData.data[i + 2] === 0 ? 1 : 0);
+            }
+          }
+          arr.push(parseInt(buffer.join(''), 2));
+          buffer = [];
+        }
+      }
+      return arr;
+    }
+
+    function canvas2grey8(canvas, type = 'bw') {
+      // each px = 4bit black + 4bit red.
+      const ctx = canvas.getContext("2d");
+      const imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);
+
+      const arr = [];
+      let buffer = [];
+
+      for (let y = 0; y < canvas.height; y += 8) {
+        for (let x = 0; x < canvas.width; x++) {
+          for (let a = 0; a < 8; a++) {
+            const i = (canvas.width * (y + a) + x) * 4;
+            const R = imageData.data[i];
+            const G = imageData.data[i + 1];
+            const B = imageData.data[i + 2];
+
+            let grey = 0;  // white
+            if (R == 255 && G != 255 && B != 255) { // red
+              grey = (type == 'bw') ? 0 : (510 + 62 - G - B) >> 6;
+            } else { // gray
+              grey = (type == 'bw') ? (255 + 31 - R) >> 5 : 0;
+            }
+            arr.push(grey);
+          }
+        }
+      }
+      return arr;
+    }
+
+    async function doMyLut() {
+      const O = 0b00000000;   // VSS
+      const B = 0b01000000;   // VSH1 for Black
+      const W = 0b10000000;   // VSL  for white
+      const R = 0b11000000;   // VSH2 for Red
+      const lut_gray8 = [
+        //  RP         A         B         C         D  SRAB  SRCD
+        0x00,     0x00, 0x00, 0x00, 0x00, 0x00, 0x00,       // LUTC
+        0x01, R | 0x20, 0x00, 0x00, 0x00, 0x01, 0x00,       // LUTR
+        0x00,     0x00, 0x00, 0x00, 0x00, 0x00, 0x00,       // LUTW
+        0x01, B | 0x03, 0x00, 0x00, 0x00, 0x01, 0x00,       // LUTB
+        0x01, B | 0x03, 0x00, 0x00, 0x00, 0x01, 0x00,       // LUTB
+      ];
+      await doCmd('lut', lut_gray8);
+    }
+
+    async function doFill(color) {
+        await doCmd('rst');
+        await sleep(2000);
+        await doCmd('fill', color);
+        await doCmd('dp', 'full');
+        await sleep(15*1000);
+    }
+
+    async function doSnvRead(type) {
+      var chr = await epdService.getCharacteristic(0xfffe);
+        if (type == 'cfg') {
+          await doCmd('snv_read', 0x01);
+          await doCmd('buf_get', 0x00);
+          var a = await chr.readValue();
+          console.log(a);
+        }
+    }
+
+    async function doSnvWrite() {
+      //var chr = await epdService.getCharacteristic(0xfffe);
+      await doCmd('buf_put', 0x00);
+      await doCmd('snv_write', 0x80);
+    }
+
+    async function doSnvCfg() {
+      var data = await doCmdRead(0x80, 32);
+      // data to hex string in '0x02x' format, should a zero in front of single digit.
+      var out = data.map(x => (x < 16 ? '0' : '') + x.toString(16)).join(' ');
+      console.log(out);
+    }
+    
+    async function doLutWrite() {
+      var lutId = document.getElementById('lutId').value;
+      lutId = parseInt(lutId);
+      var lut = eval(document.getElementById('lut').value);
+      info(lutId);
+      info(lut);
+
+      await doCmd('buf_put', [0, ...lut]);
+      await doCmd('snv_write', 0x80+lutId);
+    }
+
+    async function doLutRead() {
+      var lutId = document.getElementById('lutId').value;
+      lutId = parseInt(lutId);
+      try {
+        var data = await doCmdRead(0x80+lutId, 35);
+      } catch (e) {
+        info(e);
+        document.getElementById('lut').value = '[]';
+        return;
+      }
+      console.log(data);
+
+      var out = '[\n';
+      // split data to every 7 bytes a group
+      for (var i = 0; i < data.length; i += 7) {
+        var d = data.slice(i, i + 7);
+        out += d.map(x => '0x' + x.toString(16)).join(', ');
+        out += ',\n';
+      }
+      out += ']';
+      document.getElementById('lut').value = out;
+    }
+
+  </script>
+
+  <div>
+    <label> Choose </label>
+    <button id="btnConnect" type="button" onclick="doConnect()">Connect</button>
+  </div>
+  <div id="etagFn" style="visibility:hidden;">
+    <button type="button" onclick="doCmd('mode', 'clock')">时钟模式</button>
+    <button id="btnReadEtag" type="button" onclick="doReadEtag()">ReadEtag</button>
+    <button id="btnSetTime" type="button" onclick="doSetTime()">SetTime</button>
+    <button id="btnRtcCollab" type="button" onclick="doRtcCollab()">RtcCollab</button>
+    <button id="btnTest" type="button" onclick="doTest()">Test</button>
+    <button type="button" onclick="doCmd('save_cfg')">保存设置</button>
+  </div>
+  <div>
+    <button type="button" onclick="doCmd('mode', 'image')">图片模式</button>
+    <button type="button" onclick="doCmd('rst')">rst</button>
+    <button type="button" onclick="doCmd('bw')">bw</button>
+    <button type="button" onclick="doCmd('red')">red</button>
+    <button type="button" onclick="doCmd('dp', 'full')">dp</button>
+    <button type="button" onclick="doMyLut()">LUT</button>
+  </div>
+  <div>
+    <button type="button" onclick="doCmd('clr')">清屏</button>
+    <button type="button" onclick="doFill('black')">全黑</button>
+    <button type="button" onclick="doFill('red')">全红</button>
+  </div>
+  <div id="canvas-box">
+    <input type="file" id="image_file" onchange="load_image()" accept=".png,.jpg,.bmp,.webp,.gif">
+    <br>
+    <canvas id="canvas" width="296" height="152" style="border: black solid 1px;"></canvas>
+    <br>
+    <button onclick="doUploadImage('full')">默认刷新</button>
+    <button onclick="doUploadImage('gray8')">8级灰度</button>
+    <select id="imgLutId">
+      <option value="1">LUT1 (FastRefresh)</option>
+      <option value="2">LUT2 (Grey 8 BWR)</option>
+      <option value="3">LUT3 (User)</option>
+    </select>
+    <button onclick="alert('TBD')">LUT刷新</button>
+    <br>
+  </div>
+
+
+
+  <div>
+    <textarea type="text" id="lut", rows="20", cols="80">
+// Fast Refresh LUT(Lite) for SSD1680a BWR.
+const VSS = 0b00<<6;
+const VSH1= 0b01<<6;
+const VSL = 0b10<<6;
+const VSH2= 0b11<<6;
+[
+//RP    A           B           C           D           SRAB    SRCD
+0x0,    0x0,        0x0,        0x0,        0x0,        0x0,    0x0,  // LUTC
+0x1,    VSL|0x2f,   0x0,        VSH2|0x3f,  0x0,        0x2,    0xa,  // LUTR 
+0x1,    VSL|0x3f,   0x0,        0x0,        0x0,        0x2,    0x0,  // LUTW
+0x1,    VSH1|0x2f,  0x0,        0x0,        0x0,        0x1,    0x0,  // LUTB
+
+//FR    2: 50hz, 3: 75Hz, 4: 100Hz, 5: 125Hz
+0x04,
+
+//EOPT   VGH    VSH1    VSH2     VSL    VCOM
+//      -20v     15v      3v    -15v
+0x22,   0x17,   0x41,   0x94,   0x32,   0x36    
+];
+</textarea>
+    <br>
+    <select id="lutId">
+      <option value="1">LUT1 (FastRefresh)</option>
+      <option value="2">LUT2 (Grey 8 BWR)</option>
+      <option value="3">LUT3 (User)</option>
+    </select>
+    <button type="button" onclick="doLutWrite()">写入</button>
+    <button type="button" onclick="doLutRead()">读出</button>
+  </div>
+  <div id="log">
+    CC2640R2-ETAG Webtool. <br>
+  </div>
+</body>
+
+</html>
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