MQTT: How to handle wifi disconnection
Posted: Sun Feb 28, 2021 3:26 pm
Hello everyone!
I don't know why, but since I started using esp idf 4.1.1 I started losing wifi connection around every hour, but that's not a big deal, I handle the disconnection and reconnect exactly as the wifi sta examples shows.
But since I started experimenting with MQTT I can't get it to restart properly, this is a typical log of the disconnection:
this is what I do to handle wifi disconnection and MQTT disconnection:
where mqttServiceStart and Stop are:
I've been trying to fix this for days, but I'm missing something.
How can safely reconnect wifi and MQTT if I loose wifi connection.
Thanks in advance for your help!
Gustav
I don't know why, but since I started using esp idf 4.1.1 I started losing wifi connection around every hour, but that's not a big deal, I handle the disconnection and reconnect exactly as the wifi sta examples shows.
But since I started experimenting with MQTT I can't get it to restart properly, this is a typical log of the disconnection:
Code: Select all
I (3461644) wifi:bcn_timout,ap_probe_send_start
I (3464144) wifi:ap_probe_send over, resett wifi status to disassoc
I (3464144) wifi:state: run -> init (c800)
I (3464144) wifi:pm stop, total sleep time: 3281634372 us / 3454130616 us
I (3464154) wifi:new:<7,0>, old:<7,0>, ap:<255,255>, sta:<7,0>, prof:1
E (3464164) TRANS_SSL: ssl_poll_read select error 113, errno = Software caused connection abort, fd = 54
E (3464164) TRANS_SSL: ssl_poll_write select error 0, errno = Success, fd = 54
E (3464164) MQTT_CLIENT: Poll read error: 0, aborting connection
W (3464174) TRANS_SSL: Poll timeout or error, errno=Success, fd=54, timeout_ms=10000
I (3464194) MQTT_SERVICE: MQTT_EVENT_ERROR
E (3464194) MQTT_CLIENT: Error write data or timeout, written len = -1, errno=0
E (3464204) MQTT_CLIENT: Error sending disconnect message
I (3464214) MQTT_SERVICE: MQTT_EVENT_DISCONNECTED
I (3464224) wifi station: retry to connect to the AP
I (3464224) wifi station: connect to the AP fail
I (3464344) wifi:new:<7,0>, old:<7,0>, ap:<255,255>, sta:<7,0>, prof:1
I (3464344) wifi:state: init -> auth (b0)
I (3464344) wifi:state: auth -> assoc (0)
I (3464354) wifi:state: assoc -> run (10)
I (3464364) wifi:connected with myAccesPoint, aid = 1, channel 7, BW20, bssid = b8:27:eb:cb:43:9f
I (3464364) wifi:security: WPA2-PSK, phy: bgn, rssi: -24
I (3464364) wifi:pm start, type: 1
I (3464444) wifi:AP's beacon interval = 102400 us, DTIM period = 2
I (3464954) esp_netif_handlers: sta ip: 192.168.1.5, mask: 255.255.255.0, gw: 192.168.1.1
wifi station We have now connected to a station and can do things...
I (3465004) STORAGE: Loading ca.crt ...
I (3465124) STORAGE: Loading esp.crt ...
I (3465234) STORAGE: Loading esp.key ...
I (3465324) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (3465324) MQTT_SERVICE: Other event id:7
I (3465334) MQTT_SERVICE: MQTT task created
E (3465384) esp-tls-mbedtls: mbedtls_ssl_setup returned -0x7f00
E (3465384) esp-tls: create_ssl_handle failed
E (3465384) esp-tls: Failed to open new connection
E (3465394) TRANS_SSL: Failed to open a new connection
E (3465404) MQTT_CLIENT: Error transport connect
I (3465404) MQTT_SERVICE: MQTT_EVENT_ERROR
I (3465414) MQTT_SERVICE: MQTT_EVENT_DISCONNECTED
I (3480414) MQTT_SERVICE: Other event id:7
E (3480444) esp-tls-mbedtls: mbedtls_ssl_setup returned -0x7f00
E (3480444) esp-tls: create_ssl_handle failed
E (3480444) esp-tls: Failed to open new connection
E (3480454) TRANS_SSL: Failed to open a new connection
E (3480454) MQTT_CLIENT: Error transport connect
I (3480464) MQTT_SERVICE: MQTT_EVENT_ERROR
I (3480464) MQTT_SERVICE: MQTT_EVENT_DISCONNECTED
[..]Code: Select all
static void event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data)
{
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
esp_wifi_connect();
}
else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
mqttServiceStop();
if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY) {
esp_wifi_connect();
s_retry_num++;
ESP_LOGI(TAG, "retry to connect to the AP");
}
else {
xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
}
ESP_LOGI(TAG,"connect to the AP fail");
}
else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
printf(TAG, "Our IP address is:%s \n", ip4addr_ntoa(&event->ip_info.ip));
printf(" We have now connected to a station and can do things...\n");
s_retry_num = 0;
xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
mqttServiceStart();
}
}
Code: Select all
void mqttServiceInit(){
//certificates loaded from SDcard
const char *ca_cert = loadCert("ca.crt");
const char *esp_cert = loadCert("esp.crt");
const char *esp_key= loadCert("esp.key");
const esp_mqtt_client_config_t mqtt_cfg = {
.host = "mosquitto",
.port = 8883,
.transport = MQTT_TRANSPORT_OVER_SSL,
.event_handle = mqtt_event_handler,
.cert_pem = ca_cert,
.client_cert_pem = esp_cert,
.client_key_pem = esp_key,
.username = "espuser",
.password = "espassword"
};
//myMQTTclient is a global variable
myMQTTclient = esp_mqtt_client_init(&mqtt_cfg);
}
void mqttServiceStart(){
mqttServiceInit();
esp_mqtt_client_start(myMQTTclient);
xTaskCreate(mqttTask, "mqtt_task", 8192, NULL, 3, &mqttTaskHandle); //this is a task that periodically posts sensors values to topics
}
void mqttServiceStop(){
if( mqttTaskHandle != NULL ){
vTaskDelete(mqttTaskHandle);
mqttTaskHandle = NULL;
esp_mqtt_client_stop(myMQTTclient);
}
}
How can safely reconnect wifi and MQTT if I loose wifi connection.
Thanks in advance for your help!
Gustav