Add global event group handle for connectivity

firmware/esp32/include/main.hpp

@@ -1,9 +1,13 @@
-   #ifdef __cplusplus
-   extern "C" {
-   #endif
+   #ifndef MAIN_HPP
+   #define MAIN_HPP
+
+   #include "freertos/FreeRTOS.h"
+   #include "freertos/event_groups.h"
 
    extern volatile bool criticalErrorFlag;
+   extern EventGroupHandle_t connectivity_event_group;
+
+   #define WIFI_CONNECTED_BIT BIT0
+   #define MQTT_CONNECTED_BIT BIT1
 
-   #ifdef __cplusplus
-   }
    #endif

firmware/esp32/main/main.cpp

@@ -9,8 +9,7 @@
 
 #define WATCHDOG_KEEPALIVE_MS 8000
 
-extern EventGroupHandle_t connectivity_event_group;
-extern EventBits_t bits = xEventGroupGetBits(connectivity_event_group);
+EventGroupHandle_t connectivity_event_group;
 
 static const char* TAG = "MAIN";
 
@@ -49,6 +48,8 @@ extern "C" void app_main(void)
     };
     esp_pm_configure(&pm_cfg);
 
+    connectivity_event_group = xEventGroupCreate();
+
     xTaskCreate(watchdogTask, "watchdogs", 2048, NULL, configMAX_PRIORITIES-1, NULL);
     xTaskCreate(wifiTask, "wifi", 4096, NULL, configMAX_PRIORITIES-4, NULL);
 

firmware/esp32/main/mqtt.cpp

@@ -14,14 +14,14 @@ static const char* TAG = "MQTT";
 
 static TaskHandle_t i2c_task_handle = NULL;
 static esp_mqtt_client_handle_t mqtt_client = NULL;
-const int MQTT_CONNECTED_BIT = BIT0;
 
 static void mqtt_subscribe(void) {
     msg_id = esp_mqtt_client_subscribe(client, "/topic/qos0", 0);
 }
 
 static void mqtt_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data) {
-    esp_mqtt_event_handle_t event = event_data;
+    esp_mqtt_event_handle_t event = (esp_mqtt_event_handle_t)event_data;
+
     switch (event->event_id) {
         case MQTT_EVENT_CONNECTED:
             xEventGroupSetBits(connectivity_event_group, MQTT_CONNECTED_BIT);
@@ -65,8 +65,6 @@ static void mqtt_init(void) {
         esp_mqtt_client_start(client);
 }
 
-void mqtt_publish(void) {}
-
 void mqttTask(void *pvParameters) {
     ESP_LOGV(TAG, "Task started");
 
@@ -79,8 +77,10 @@ void mqttTask(void *pvParameters) {
     for(;;) {
         ESP_LOGV(TAG, "Checking broker connection...");
 
-        if(bits && MQTT_CONNECTED_BIT) {
-            ESP_LOGV(TAG, "Connection estabilished");
+        EventBits_t bits = xEventGroupGetBits(connectivity_event_group);
+
+        if ((bits & (WIFI_CONNECTED_BIT | MQTT_CONNECTED_BIT)) == (WIFI_CONNECTED_BIT | MQTT_CONNECTED_BIT)) {
+            ESP_LOGV(TAG, "Connection established");
 
             uint32_t task_notification = ulTaskNotifyTake(pdTRUE, pdMS_TO_TICKS(MQTT_TASK_TIMEOUT_MS));
             if (task_notification) twi_do(global_rx_buffer); //FIXME: develop i2c libs! (this func should then call mqtt_publish() if needed)

firmware/esp32/main/wifi.cpp

@@ -12,8 +12,6 @@
 
 static const char* TAG = "WIFI";
 
-const int WIFI_CONNECTED_BIT = BIT0;
-
 static void wifi_event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data) {
     if (event_base == WIFI_EVENT) {
         switch (event_id) {
@@ -49,8 +47,6 @@ static void wifi_init_sta(void) {
         ESP_ERROR_CHECK(nvs_flash_init());
     }
 
-    connectivity_event_group = xEventGroupCreate();
-
     ESP_ERROR_CHECK(esp_netif_init());
 
     ESP_ERROR_CHECK(esp_event_loop_create_default());