- websocket client on ESP32

- telemetry protocol builder
- server-side message handling
- database migrations
- telemetry persistence

esp32/main/sender_task.cpp

@@ -1,9 +1,11 @@
 #include "sender_task.h"
 #include "sampler_task.h"
 #include "ringbuf.h"
+#include "protocol.h"
 
 #include <stdio.h>
 #include <time.h>
+#include "ws.h"
 
 extern "C" {
 #include "freertos/FreeRTOS.h"
@@ -18,21 +20,35 @@ static void sender_task(void *arg) {
     while (1) {
         vTaskDelay(pdMS_TO_TICKS(1000)); // 1 Гц
 
+        char buf[512];
+
         ringbuf_t *rb = sampler_get_buffer();
         ringbuf_copy(rb, data);
 
         time_t now = time(NULL);
 
-        // формируем JSON
-        printf("{\"v\":1,\"t\":\"t\",\"id\":%lu,\"ts\":%lld,\"d\":1,\"p\":{",
-       (unsigned long)msg_id++, (long long)now);
-        printf("\"m\":\"v\",\"s\":\"adc35\",\"u\":\"raw\",\"v\":[");
+        int len = build_telemetry(
+            buf,
+            sizeof(buf),
+            msg_id++,
+            now,
+            1,              // device_id (пока захардкожен)
+            "v",            // metric
+            "adc35",        // source
+            "raw",          // unit
+            data,
+            RINGBUF_SIZE
+        );
 
-        for (int i = 0; i < RINGBUF_SIZE; i++) {
-            printf("[%d,%d]%s", i, data[i], (i < RINGBUF_SIZE - 1) ? "," : "");
+        if (len > 0) {
+            if (ws_is_connected()) {
+                ws_send(buf);
+            } else {
+                printf("%s\n", buf);  // fallback
+            }
+        } else {
+            printf("build_telemetry failed\n");
         }
-
-        printf("]}}\n");
     }
 }