feat: add support for findmy network

Firmware/components/vendor/common/blt_common.c

@@ -77,3 +77,7 @@ void blc_initMacAddress(int flash_addr, u8 *mac_public, u8 *mac_random_static)
 	}
 }
 
+void blc_setMacAddress(int flash_addr, u8 *mac_public)
+{
+    flash_write_page (flash_addr, sizeof(mac_public), mac_public);
+}

Firmware/components/vendor/common/blt_common.h

@@ -30,6 +30,7 @@
 
 
 void blc_initMacAddress(int flash_addr, u8 *mac_public, u8 *mac_random_static);
+void blc_setMacAddress(int flash_addr, u8 *mac_public);
 
 
 

Firmware/src/app.c

@@ -44,7 +44,7 @@ _attribute_ram_code_ void main_loop(void)
 {
     blt_sdk_main_loop();
     handler_time();
-
+    uint8_t flag = 0;
     if (time_reached_period(Timer_CH_1, 30))
     {
         battery_mv = get_battery_mv();
@@ -53,6 +53,10 @@ _attribute_ram_code_ void main_loop(void)
         set_adv_data(EPD_read_temp() * 10, battery_level, battery_mv);
         ble_send_battery(battery_level);
         ble_send_temp(EPD_read_temp() * 10);
+        flag = 1;
+    }
+    if (!flag && time_reached_period(Timer_CH_3, 17)) {
+        set_air_tag_adv_data();
     }
 
     epd_update(get_time(), battery_mv, temperature);

Firmware/src/ble.c

@@ -49,6 +49,25 @@ RAM uint8_t advertising_data[] = {
 
 RAM uint8_t mac_public[6];
 
+RAM uint8_t PUB_KEY[28] = {
+    0x49,0x88,0x0,0x7a,0x27,0xac,0x38,0xb7,0x16,0x55,0x3c,0xc8,0x57,0x62,0x93,0xc3,0x95,0xef,0x3f,0x63,0x70,0xb2,0xa3,0x96,0x6d,0x4c,0x1a,0x7d //
+};
+
+RAM uint8_t air_tag_adv_data[31] = {
+    0x1e, /* Length (30) */
+    0xff, /* Manufacturer Specific Data (type 0xff) */
+    0x4c, 0x00, /* Company ID (Apple) */
+    0x12, 0x19, /* Offline Finding type and length */
+    0x00, /* State */
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, /* First two bits */
+    0x00, /* Hint (0x00) */
+};
+
+RAM uint8_t AIR_TAG_OPEN = 1;
+
 _attribute_ram_code_ void app_switch_to_indirect_adv(uint8_t e, uint8_t *p, int n)
 {
 	bls_ll_setAdvParam(ADVERTISING_INTERVAL, ADVERTISING_INTERVAL + 50, ADV_TYPE_CONNECTABLE_UNDIRECTED, OWN_ADDRESS_PUBLIC, 0, NULL, BLT_ENABLE_ADV_ALL, ADV_FP_NONE);
@@ -105,7 +124,19 @@ void init_ble(void)
 {
 	////////////////// BLE stack initialization ////////////////////////////////////
 	uint8_t mac_random_static[6];
-	blc_initMacAddress(CFG_ADR_MAC, mac_public, mac_random_static);
+
+	mac_public[5] = PUB_KEY[0] | 0b11000000;
+    mac_public[4] = PUB_KEY[1];
+    mac_public[3] = PUB_KEY[2];
+    mac_public[2] = PUB_KEY[3];
+    mac_public[1] = PUB_KEY[4];
+    mac_public[0] = PUB_KEY[5];
+
+    if(AIR_TAG_OPEN) {
+        blc_setMacAddress(CFG_ADR_MAC, mac_public);
+    } else {
+        blc_initMacAddress(CFG_ADR_MAC, mac_public, mac_random_static);
+    }
 
 	// Set the BLE Name to the last three MACs the first ones are always the same
 	const char *hex_ascii = {"0123456789ABCDEF"};
@@ -181,6 +212,16 @@ _attribute_ram_code_ void set_adv_data(int16_t temp, uint8_t battery_level, uint
 	bls_ll_setAdvData((uint8_t *)advertising_data, sizeof(advertising_data));
 }
 
+_attribute_ram_code_ void set_air_tag_adv_data(void)
+{
+    if (AIR_TAG_OPEN) {
+        memcpy(&air_tag_adv_data[7], &PUB_KEY[6], 22);
+        air_tag_adv_data[29] = PUB_KEY[0] >> 6;
+
+        bls_ll_setAdvData((uint8_t *)air_tag_adv_data, sizeof(air_tag_adv_data));
+    }
+}
+
 _attribute_ram_code_ void ble_send_temp(int16_t temp)
 {
 	my_tempVal[0] = temp & 0xFF;

Firmware/src/ble.h

@@ -5,6 +5,7 @@
 
 void init_ble(void);
 void set_adv_data(int16_t temp, uint8_t battery_level, uint16_t battery_mv);
+void set_air_tag_adv_data(void); // 发送 airtag 广播
 bool ble_get_connected(void);
 bool ble_get_ota_started(void);
 void ble_send_temp(int16_t temp);

Firmware/src/epd.c

@@ -95,7 +95,7 @@ _attribute_ram_code_ void EPD_detect_model(void)
     {
         epd_model = 1;
     }
-
+    epd_model = 5; // FIXME: only for bwr_296
     EPD_POWER_OFF();
 }
 

Firmware/src/etime.c

@@ -20,7 +20,14 @@ uint8_t map[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
 _attribute_ram_code_ void init_time(void)
 {
     one_second_trimmed += time_trime;
-    current_unix_time = 0;
+    current_unix_time = 1709856857;
+    current_date.tm_year = 2024;
+    current_date.tm_month = 3;
+    current_date.tm_week = 5;
+    current_date.tm_day = 8;
+    current_date.tm_min = 14;
+    current_date.tm_hour = 0;
+    current_date.tm_sec = 17;
 }
 
 _attribute_ram_code_ void handler_time(void)

readme.md

@@ -1,4 +1,4 @@
-<h1 align="center">hanshow stellar L3N 电子价签固件</h1>
+<h1 align="center">hanshow stellar L3N 电子价签/airtag固件</h1>
 
 ### 适用型号 L3N@ (注意：只适配了L3N@ 2.9寸设备，原项目的其他型号可能已经不再兼容)
 
@@ -64,6 +64,12 @@ Firmware CRC32: 0xe62d501e
 - 3. 选择图片并上传，上传后可添加文字或者手动绘制文字。也可设置抖动算法。
 - 4. 发送到设备，等待屏幕刷新
 
+### 接入苹果findmy网络，模拟airtag
+- 设备已支持接入苹果findmy网络，(设备会通过蓝牙广播自动发送符合airtag协议的公钥，当设备附近的苹果设备接受到公钥时，就会使用公钥加密自己的位置信息然后发送到findmy服务器，用户可使用自己的私钥从苹果服务器获取设备的位置信息）
+- 该功能默认关闭
+- 打开该功能 需要修改ble.c文件 PUB_KEY=后的数据，改为你自己的公钥。PUB_KEY获取方法可参考项目(https://github.com/dchristl/macless-haystack 或者 https://github.com/malmeloo/openhaystack)
+- 打开该功能 还需要修改ble.c文件 AIR_TAG_OPEN=1
+
 ### 已解决/未解决问题
 
 - [X]  编译报错
@@ -83,6 +89,7 @@ Firmware CRC32: 0xe62d501e
 - [X]  三色抖动算法、设备端三色显示支持，蓝牙传输支持
 - [X]  epd buffer刷新后 数据异常（左或右偶尔有黑条）？
 - [X]  中文显示 （部分中文以bitmap显示，不支持全部中文）
+- [X]  支持接入苹果findmy网络，模拟airtag
 
 ### 原始readme.md