Add esp32s2 support

esp32/main/main.cpp

@@ -1,8 +1,9 @@
+#include "esp_log.h"
 #include "system_init.h"
-#include "protocol_test.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/projdefs.h"
 #include "freertos/task.h"
+#include "protocol.h"
 
 static const char* TAG = "iot_fish";
 
@@ -10,9 +11,14 @@ extern "C" void app_main(void)
 {
     system_init();
 
-    for (int i=0; i<10; i++)
+    for (int i=0; i<5; i++)
     {
-        protocol_run_tests();
+        char buf[512];
+        int len = build_telemetry_single(buf, sizeof(buf), "123", "dev1", 123456, "temperature", 22.5, "C", nullptr, 0);
+
+        if (len > 0) {
+            ESP_LOGI("protocol", "%s\n", buf);
+        }
         vTaskDelay(pdMS_TO_TICKS(1000));
     }