Wifi connection after reboot

[stain3565]

I am attempting to put in place code that will allow for a soft reboot or a machine reset of ESP32. What I want to do is setup a wifi connection, if not already connected, via a list of ssids and passwords.

I am happy with most of my code except for handling a machine reset:

`
def wificonnectarray():

connectioncomplete = False
wlan = network.WLAN(network.STA_IF)
if wlan.isconnected():
    print("Already connected")
    connectioncomplete = True
else:
    for ssid, psk in ssidarr	:

wlan = network.WLAN(network.STA_IF)

        wlan.active(True)
        wlan.connect(ssid, psk)

    # Wait for the connection to succeed or fail
        for _ in range(20):
            if wlan.isconnected():
                print("Connected to", ssid)
                break
            else:
                time.sleep(3)

    # If we successfully connected to a network, stop trying
        if wlan.isconnected():
            connectioncomplete = True" test
            break

return connectioncomplete

`

If it is a soft reboot and I already have a connection, all is fine. I get a nice "Already connected" message and everything continues. However, a machine reset causes a "Internal wifi error" on the first "if wlan.isconnected():" statement. Given that the wifi for the esp32 has been reset, I am not sure how to combine these separate tests in logic that will not just fail after a machine reset.

I know that my later code will connect with the ssid list as I have commented out the initial connection test and machine reset with this altered code. I do realise that the "for ssid" loop will return a successful connection if it is a soft reboot and a connection already exists. However, that will seem to be a successful connection for the first ssid on my list, even if that ssid text entry is complete rubbish, so I am then not able to trust the current ssid on the list to be the one connected. I do want to record which ssid it is connecting to so do want a separate "Already connected" check first. If I am recording the connections correctly, I will have that info from the previous machine reboot/reset.

[davefes]

"Internal wifi error"

Follow any disconnect with:

    sta_if.disconnect()

Start any connect sequence with:

    sta_if.active(True)

 #  seems more reliable to start with a fresh connect()
    if sta_if.isconnected():
        sta_if.disconnect()
        print (f'started in the connected state, but now disconnected')
    else:
        print (f'started in the disconnected state')

    utime.sleep(0.1)

or better still try using this:
https://github.com/glenn20/micropython-espnow-utils/blob/main/src/wifi.py

[stain3565]

Thanks.
I went with a standard disconnect up front and then used the espnow util wifi.py, just capturing TimeoutError as valid if it cannot connect.

`def wificonnectarray():

connectioncomplete = False

sta, ap = wifi.reset()

for ssid, psk in ssidarr:
    try:
        wifi.connect(ssid, psk)


        connectioncomplete = True
        break
    except wifi.TimeoutError:
        pass
    
return connectioncomplete

`

Perfect thank you