diff --git a/examples/ex02_demo/ex02_demo.ino b/examples/ex02_demo/ex02_demo.ino
index db0fba9..3be5b60 100644
--- a/examples/ex02_demo/ex02_demo.ino
+++ b/examples/ex02_demo/ex02_demo.ino
@@ -199,7 +199,7 @@ void setup(){
   //使用guy.guyFS()函数返回可用的文件系统. 默认为SD卡. 当SD卡不可用时, 自动切换到内置的LittleFS.
 
   //显示打开的图片信息(宽度和高度), 和剩余内存
-  Serial.printf("[%lu] sp.w: %d, h: %d, res: %d.\n",millis(),sp.width(),sp.height(),guy.getFreeMem());
+  Serial.printf("[%lu] sp.w: %d, h: %d, res: %d.\n",millis(),(int)sp.width(),(int)sp.height(),guy.getFreeMem());
 
   guy.drawImage(sp,10,10);  //使用抖动像素的方式显示图片(不是灰度, 只有黑点和白点的那种显示效果)
 
diff --git a/examples/ex05_multifont/1_u8g2font/1_u8g2font.ino b/examples/ex05_multifont/1_u8g2font/1_u8g2font.ino
index 061931c..a8b31d8 100644
--- a/examples/ex05_multifont/1_u8g2font/1_u8g2font.ino
+++ b/examples/ex05_multifont/1_u8g2font/1_u8g2font.ino
@@ -55,9 +55,9 @@
 
 ReadguyDriver guy;//新建一个readguy对象, 用于显示驱动.
 
-extern const uint8_t ctg_u8g2_wqy12_chinese1[]; //声明中文字体文件
+extern const uint8_t ctg_u8g2_wqy12_gb2312[]; //声明中文字体文件
 
-const lgfx::U8g2font cn_font(ctg_u8g2_wqy12_chinese1); //U8G2格式中文字体转化为LGFX格式字体
+const lgfx::U8g2font cn_font(ctg_u8g2_wqy12_gb2312); //U8G2格式中文字体转化为LGFX格式字体
 
 void setup(){
 
@@ -69,7 +69,7 @@ void setup(){
 
   guy.setCursor(10,10);
 
-  guy.print("中文");
+  guy.print("你好, 中文");
 
   guy.display();
 }
diff --git a/src/guy_epaper/guy_154b_270b_290b/guy_154b_270b_290b.cpp b/src/guy_epaper/guy_154b_270b_290b/guy_154b_270b_290b.cpp
index 8c464f7..818891a 100644
--- a/src/guy_epaper/guy_154b_270b_290b/guy_154b_270b_290b.cpp
+++ b/src/guy_epaper/guy_154b_270b_290b/guy_154b_270b_290b.cpp
@@ -102,17 +102,17 @@ const unsigned char drvSSD168x::VSH_table[32]=
 
 //以下代码均为我 FriendshipEnder 原创, 呵呵哒~~
 void drvSSD168x::SetLut() {       
+	unsigned int i;
 	guy_epdCmd(0x3f);
-	guy_epdParam(greyScaling?0x07:0x22);
+	guy_epdParam(greyScaling?0x07:0x02); //greyScaling?0x07:0x22
 	guy_epdCmd(0x03);	// gate voltage
-	guy_epdParam(0x17);
+	guy_epdParam(0x17); //0x17 orig
 	guy_epdCmd(0x04);	// source voltage
 	guy_epdParam(greyScaling?pgm_read_byte(VSH_table+16+iLut):pgm_read_byte(VSH_table+iLut));
 	guy_epdParam(0xA8);	// VSH2
 	guy_epdParam(0x32);	// VSL
 	guy_epdCmd(0x2c);		// VCOM
-	guy_epdParam(0x28);
-	unsigned char i;
+	guy_epdParam(0x20); //0x28 orig
 	guy_epdCmd(0x32);
   if(_part){
     for(i=0;i<5;i++){
@@ -160,6 +160,8 @@ void drvSSD168x::drv_dispWriter(std::function<uint8_t(int)> f,uint8_t m){ //单
     for(int i=0;i<10;i++)  guy_epdParam(i==5?0x40:0x00);  
     guy_epdCmd(0x3C); //BorderWavefrom
     guy_epdParam(0x80);	
+    guy_epdCmd(0x18); //BorderWavefrom
+    guy_epdParam(0x80);	
 
     guy_epdCmd(0x22); 
     guy_epdParam(0xC0);   
@@ -172,9 +174,10 @@ void drvSSD168x::drv_dispWriter(std::function<uint8_t(int)> f,uint8_t m){ //单
       epd_PowerOn=1;
       _part=0;
       iLut=15;
+      guy_epdBusy(20);   
     }
     guy_epdCmd(0x12);  //SWRESET
-    guy_epdBusy(10);   
+    guy_epdBusy(20);   
     
     guy_epdCmd(0x01); //Driver output control      
     guy_epdParam((epdHeight-1)&0xff);
diff --git a/src/guy_wireless.cpp b/src/guy_wireless.cpp
index 818470d..b53244f 100644
--- a/src/guy_wireless.cpp
+++ b/src/guy_wireless.cpp
@@ -704,7 +704,8 @@ void ReadguyDriver::handleFinal(){
 #else
   uint64_t gotID;
   esp_flash_read_unique_chip_id(esp_flash_default_chip,&gotID);
-  sprintf(cbuf, "%016llx", gotID);
+  //sprintf(cbuf, "%016llx", gotID);
+  sprintf(cbuf, "%08x%08x",(unsigned int)(gotID>>32),(unsigned int)(gotID&0xffffffffu));
 #endif
   s+=cbuf;
   s+=F("<br/>闪存容量: ");
diff --git a/src/readguy.cpp b/src/readguy.cpp
index d58911c..ab3f9c6 100644
--- a/src/readguy.cpp
+++ b/src/readguy.cpp
@@ -328,7 +328,7 @@ uint8_t ReadguyDriver::checkEpdDriver(){
 void ReadguyDriver::setEpdDriver(bool initepd, bool initGFX){
   guy_dev->spi_tr_release = in_release;
   guy_dev->spi_tr_press   = in_press;
-  if(initepd) guy_dev->drv_init(); //初始化epd驱动层
+  guy_dev->drv_init(); //初始化epd驱动层
   //if(g_width) guy_width = g_width;
   //else guy_width = guy_dev->drv_width(); //宽度必须是8的倍数, 但这个可以由GFX自动计算
   //if(g_height) guy_height = g_height;
@@ -351,6 +351,7 @@ void ReadguyDriver::setEpdDriver(bool initepd, bool initGFX){
 #ifdef READGUY_SERIAL_DEBUG
   Serial.printf_P(PSTR("[Guy EPD] EPD init OK(%d): w: %d, h: %d\n"),guy_dev->drv_ID(),guy_dev->drv_width(),guy_dev->drv_height());
 #endif
+  if(initepd) display(READGUY_SLOW); //25/3/13:feat: 如果initepd为true说明墨水屏需要从上电or休眠初始化, 必定慢刷
 }
 #ifdef READGUY_ENABLE_SD
 bool ReadguyDriver::setSDcardDriver(){
@@ -524,12 +525,15 @@ void ReadguyDriver::setButtonDriver(){
       analogWrite(READGUY_bl_pin,currentBright);
 #else
 #if (defined ( ESP_IDF_VERSION_VAL ) && (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)))
-      ledcAttach(READGUY_bl_pin,8000,8);
+      //ledcAttach(READGUY_bl_pin,8000,8);
+      analogWrite(READGUY_bl_pin, currentBright);
+      analogWriteFrequency(READGUY_bl_pin, 8000); //esp32宜快一些, 减少频闪影响
+      analogWriteResolution(READGUY_bl_pin, 8); //其实完全可以再快点的
 #else
       ledcSetup(0, 8000, 8);
       ledcAttachPin(READGUY_bl_pin, 0);//稍后加入PWM驱动...
-#endif
       ledcWrite(0, currentBright);
+#endif
 #endif
     }
     else {
@@ -567,10 +571,12 @@ fs::FS &ReadguyDriver::guyFS(uint8_t initSD){
 void ReadguyDriver::setBright(int d){
   if(currentBright>=0 && d>=0 && d<=255){
     currentBright=d;
-#ifdef ESP8266
+#if ((defined (ESP8266)))
     analogWrite(READGUY_bl_pin,d);
 #else
+#if (defined ( ESP_IDF_VERSION_VAL ) && (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)))
     ledcWrite(0, d);
+#endif
 #endif
   }
   else if(currentBright>=-2 && currentBright<0){ //-1为不支持PWM的亮起,-2为不支持PWM的熄灭