esp8266 at命令开发

esp8266 at命令开发

无论哪个平台，我感觉at命令开发是及其重要的，本文介绍下如何依赖于串口通信实现at命令开发。

**1.和前面添加功能模块一样，先创建一个at命令处理任务。

void app_main(void)
{
   //modify cdb 2019-12-19
   // printf("SDK version:%s\n", esp_get_idf_version());
   // Initialize NVS
    esp_err_t ret = nvs_flash_init();
    char sys_time[64] = {0};

    if (ret == ESP_ERR_NVS_NO_FREE_PAGES) {
        ESP_ERROR_CHECK(nvs_flash_erase());
        ret = nvs_flash_init();
    }

    ESP_ERROR_CHECK(ret);
    //初始化wifi,并且联网
    initialise_wifi();
    //创建mqtt 处理任务
    ret = xTaskCreate((void*)mqtt_client_thread,
                  MQTT_CLIENT_THREAD_NAME,
                  MQTT_CLIENT_THREAD_STACK_WORDS,
                  NULL,
                  MQTT_CLIENT_THREAD_PRIO,
                  NULL);

    if (ret != pdPASS)  {
        DBG_C("mqtt create client thread %s failed\n", MQTT_CLIENT_THREAD_NAME);
    }

    //创建gpio led key处理任务
    ret = xTaskCreate((void*)gpio_task,
                  GPIO_THREAD_NAME,
                  GPIO_THREAD_STACK_WORDS,
                  NULL,
                  GPIO_THREAD_PRIO,
                  NULL);
    if (ret != pdPASS)  {
        DBG_C("qpio thread %s failed\n", GPIO_THREAD_NAME);
    }

    //创建sntp处理任务
    ret = xTaskCreate((void*)sntp_example_task,
                  SNTP_THREAD_NAME,
                  SNTP_THREAD_STACK_WORD