Handling WLAN and MQTT disconnects

[cmisztur]

Hello. Before I start coding it up I was wondering if anyone has a good base model for detecting WiFi and mqtt failures and reconnecting?

Thanks
Chris

[oligauc]

@cmisztur To check if you are connected to wifi you can use the isconnected() as show below

from network import WLAN
import time


class WifiMonitor:

    def __init__(self):
        self.conn_timeout = 20
        self.wlan = WLAN(mode=WLAN.STA)

    def _connect(self, ssid, pswd):
        if not self.wlan.isconnected():
            print("Connecting to Wifi SSID: {} PASS: {}".format(ssid, pswd))
            self.wlan.connect(ssid, auth=(WLAN.WPA2, pswd))

            count_10ms = 0
            while count_10ms <= self.conn_timeout * 100 and not self.wlan.isconnected():
                count_10ms += 1
                time.sleep(0.01)

        if self.wlan.isconnected():
            print("WiFi connected: {}".format(self.wlan.ifconfig()))

    def connect_loop(self, ssid, pswd):
        while True:
            try:
                self._connect(ssid, pswd)
            except Exception as e:
                print("WIFI connection error: {}".format(e))
                pass
            time.sleep(10)

WIFI_SSID = 'my ssid'
WIFI_PASS = 'my pass'

wifi = WifiMonitor()
wifi.connect_loop(WIFI_SSID, WIFI_PASS)

For MQTT you can send a ping to the MQTT server