ESP32 MQTT多代理设置

如何解决ESP32 MQTT多代理设置

我试图使用ESP-IDF同时连接到2个MQTT代理。一个在TLS端口8883上，另一个在1883端口上不安全。

我已经声明了2个客户端实例，但是以某种方式我无法使它们连接到代理。

如果我注释掉其中一个，则效果很好。

源代码：

// Device manager configuration
    esp_mqtt_client_config_t mqtt_device_manager_cfg = {
        .uri = MQTT_DEVICE_MANAGER_URI,.port = MQTT_DEVICE_MANAGER_PORT,.username = (const char*) device_UUID,.password = MQTT_DEVICE_MANAGER_PASSWORD,.client_id = (const char*) device_UUID,.disable_clean_session = 1,.cert_pem = client_cert_pem,.transport = MQTT_TRANSPORT_OVER_SSL
    }; 
    device_manager_mqtt_client = esp_mqtt_client_init(&mqtt_device_manager_cfg);
    esp_mqtt_client_register_event(device_manager_mqtt_client,ESP_EVENT_ANY_ID,mqtt_device_manager_event_handler,NULL);
    esp_mqtt_client_start(device_manager_mqtt_client);
    
// MQTT configuration
    esp_mqtt_client_config_t mqtt_cfg = {
        .uri = MQTT_URI,.port = MQTT_PORT,.username = MQTT_USERNAME,.password = MQTT_PASSWORD,.transport = MQTT_TRANSPORT_OVER_TCP
    };
    mqtt_client = esp_mqtt_client_init(&mqtt_cfg);
    esp_mqtt_client_register_event(mqtt_client,mqtt_event_handler,NULL);
    esp_mqtt_client_start(mqtt_client);

错误：

E (5078) esp-tls: mbedtls_ssl_handshake returned -0x2700
I (5078) wifi:I (5078) esp-tls: Failed to verify peer certificate!
int: state=0 i=0
I (5078) esp-tls: verification info:   ! The certificate is not correctly signed by the trusted CA

E (5088) esp-tls: Failed to open new connection
E (5098) TRANS_SSL: Failed to open a new connection
E (5098) MQTT_CLIENT: Error transport connect

以某种方式看来，不安全的客户端认为它是安全的，并试图使用证书，但不应这样做。

我在做什么错了？

解决方法

如果我删除.cert_pem值，则可以正常工作。