feat(nfc): include IMEI in emulated tag payload

ql-application/threadx/interface/custom_app/nfc.c

@@ -3,8 +3,9 @@
 #include <string.h>
 #include "ql_rtos.h"
 #include "ql_application.h"
-#include "ql_audio.h"
-#include "ql_iic.h"
+#include "ql_audio.h"
+#include "ql_dev.h"
+#include "ql_iic.h"
 #include "ql_gpio.h"
 #include "app_inc.h"
 #include "ql_fs.h"
@@ -48,6 +49,7 @@ static volatile u32 g_nfc_tx_mode_deadline = 0;
 #define NFC_TYPE2_READ_SIZE         16
 #define NFC_TYPE2_MEMORY_SIZE       160
 #define NFC_TYPE2_NDEF_OFFSET       16
+#define NFC_IMEI_DIGITS             15
 
 #define NFC_IRQ_TX                  0x40
 #define NFC_IRQ_RX                  0x20
@@ -173,6 +175,7 @@ static void nfc_type2_build_ndef(void)
 {
     char device_id[32] = {0};
     char serial_number[32] = {0};
+    char imei[32] = {0};
     char json[128];
     int json_len;
     u8 *ndef;
@@ -184,10 +187,17 @@ static void nfc_type2_build_ndef(void)
     if (hal_os_get_device_sn(serial_number) != 0) {
         strcpy(serial_number, "unknown");
     }
+    if (ql_dev_get_imei(imei, sizeof(imei)) != QL_DEV_SUCCESS ||
+        imei[0] == '\0') {
+        strcpy(imei, "unknown");
+    } else {
+        imei[NFC_IMEI_DIGITS] = '\0';
+    }
 
     json_len = snprintf(json, sizeof(json),
-                        "{\"device_id\":\"%s\",\"serial_number\":\"%s\"}",
-                        device_id, serial_number);
+                        "{\"device_id\":\"%s\",\"serial_number\":\"%s\","
+                        "\"imei\":\"%s\"}",
+                        device_id, serial_number, imei);
     if (json_len < 0) {
         json_len = 0;
     } else if (json_len >= (int)sizeof(json)) {