Error -6 and -13 on sending larger (up to 37kB) chunks of data about esp-mqtt HOT 4 CLOSED

Did you find a solution to your problem in the end?

from esp-mqtt.

I tried to pin it down more exactly and found a few problems regarding the memory usage. Those problems weren't exactly at your side so I closed the issue. But I can list two things I changed in your code to make it work better for me.

• I increased the option.keep_alive to 60
• I error checked the creation of your esp_mqtt_process task and put it in a delayed while-loop to retry until enough memory has been freed. I was running into errors because there wasn't enough memory left for the task to be created so the mqtt-client didn't start properly and I would have had to call esp_mqtt_start repeatedly. There should always be enough memory but in some cases the IDLE-task needs to be given some time to free it before the mqqt-task can use it.

// create mqtt thread
    BaseType_t err = pdFAIL;
    while (err != pdPASS) {
        ESP_LOGI(ESP_MQTT_LOG_TAG, "esp_mqtt_start: biggest free heap-block is %d bytes", heap_caps_get_largest_free_block(MALLOC_CAP_8BIT));  // heapcontrol
        ESP_LOGI(ESP_MQTT_LOG_TAG, "esp_mqtt_start: create task");
        err = xTaskCreatePinnedToCore(esp_mqtt_process, "esp_mqtt", CONFIG_ESP_MQTT_TASK_STACK_SIZE, NULL, CONFIG_ESP_MQTT_TASK_STACK_PRIORITY, &esp_mqtt_task, 1);
        // BaseType_t err = xTaskCreate(esp_mqtt_process, "esp_mqtt", CONFIG_ESP_MQTT_TASK_STACK_SIZE, NULL, CONFIG_ESP_MQTT_TASK_STACK_PRIORITY, &esp_mqtt_task);
        if (err != pdPASS) {
            ESP_LOGE(ESP_MQTT_LOG_TAG, "esp_mqtt_start: error while creating esp_mqtt_process task %d", err);
        }
        vTaskDelay(500 / portTICK_PERIOD_MS);
    }
    ESP_LOGI(ESP_MQTT_LOG_TAG, "esp_mqtt_start: biggest free heap-block is %d bytes", heap_caps_get_largest_free_block(MALLOC_CAP_8BIT));  // heapcontrol
    // set local flag
    esp_mqtt_running = true;

It is working better but noew I get the lwmqtt -4 error quite often with various command_timeout lengths. As this doesn't really fit in the issue and I don't have too much time to look into it at the moment I didn't open a new issue (yet).

from esp-mqtt.

Seems like it's related to this. Make sure you have the latest esp-idf code (it's a shame such basic stuff only entered the repository a month ago).

from esp-mqtt.

@X-Ryl669 Thanks for sharing!

from esp-mqtt.