Hi.
I’m sorry for taking so long to get back to you. I missed your question.
 
What do you mean by “stops working”? What happens exactly? Does it turn off or does it disconnect from your router?
Do you want it to try to reconnect to the broker as soon as Wi-Fi is available?
 
Regards,
Sara

Hi Sara,
Don’t worry for the delay, thank you for your answer.
If, for any reason the wifi disappear, the python script continue running but is in a wifi error loop and the rest of my script is ignored.
Very annoying if a solenoid valve is on.
When the wifi returns all is OK.
I just wish my script be executed even when the wifi is down. Is there a way to do this, perhaps with another wifi manager ??

Hi.
If the watering system works without any external action, you can try to make your Wi-Fi connection non-blocking.
How are you handling the Wi-Fi connection?

Regards,
Sara
 
 

Hi Sara,
 
That’s how I handling the Wi-Fi connection :

import time
import ntptime
import esp
import network
from network import WLAN #AJOUT
from umqtt.simple import MQTTClient
import ubinascii
import machine
from machine import RTC
from machine import WDT
import micropython
import ujson
import sys
import random
import gc
gc.collect()
esp.osdebug(None)
station = network.WLAN(network.STA_IF)
station.active(True)
station.connect(ssid, password)
while station.isconnected() == False:
    time.sleep(2)
    # wdt.feed()
    print(“Pas de connexion WIFi”)
    pass
print(‘Connection successful’)
print(station.ifconfig())

Please teach me how to make my Wi-Fi connection non-blocking that’s what I look for !!
My script is standalone working, time to time I send via MQTT a new set of parameters which is stored in a data file in the ESP32 memory.
Thanks in advance for your help.
Best regards
Philippe

Hi.
You can create a function that connects to Wi-Fi. Inside that function, define a number of attempts to connect to wi-fi, after setting that it is not connected.
For example, a function called connect_wifi() that tries to connect to Wi-Fi and returns true if wi-fi is connected or false otherwise.

Then, have another function that checks whether Wi-Fi is connected or not. It can be called check_wifi(), for example.

Then, in your main loop, you can check the wi-fi connection every 10 seconds, for example by calling the check:wifi() function. If it is not connected, call the connect_wifi() to try to connect again..

After this, do all the other tasks for your code.

So, in summary, in you main loop:
– check whether Wi-Fi is connected or not (check_wifi() function) every 10 seconds for example (use timers instead of delays)
– if wi-fi not connected, try to connect to wi-fi, call the connect_wifi() function, save in a variable, whether connection was successful or not
– do your other tasks

– once 10 seconds have passed, it will check the Wi-Fi connection again.
– (the loop repeats)

I hope this helps giving you some guidance to rearrange your code.

Alternatively, you can try to use asynchronous programming. You can check this tutorial: https://randomnerdtutorials.com/micropython-esp32-esp8266-asynchronous-programming/
Regards,
Sara

Hi Sara,
 
Many thanks for your explanations, I will try and be back later.
I use PAHO-MQTT and I suppose this library use asyncio, I will also try this afterr reading of your link
See you soon for the results.
Good afternoon.
Best regards.
Philippe

Great!
Then, let me know your results.
 
Regards,
Sara