AP connect is ignoring password

[ctimmer]

After connecting to an access point with the correct password, the connection succeeds even with an incorrect password

MicroPython v1.22.0 on 2023-12-27; Raspberry Pi Pico W with RP2040
Type "help()" for more information.
>>> 

The wait for connection loop with displays:

    #access_point["password"] = "Error" # for testing
    #access_point["ssid"] = "Error"     # for testing
    print('connecting to WIFI:', access_point["ssid"])
    if "ifconfig" in access_point :
        wlan.ifconfig (access_point["ifconfig"])
    print ("SSID:" + access_point["ssid"], "PW:" + access_point["password"])
    wlan.connect (access_point["ssid"], access_point["password"])
    connect_max_ms = time.ticks_add (time.ticks_ms (), (CONNECT_TIMEOUT_SECONDS * 1000))
    connect_fail_message = "Connect TIME OUT"
    while time.ticks_diff (connect_max_ms, time.ticks_ms ()) > 0 :
        time.sleep_ms (100)
        status = wlan.status ()
        print ("status:", status)
        if status == network.STAT_CONNECTING :
            #print ("Connecting...")
            continue
        if status == network.STAT_GOT_IP :
            print('Connected:', wlan.ifconfig())
            return
        if status == network.STAT_WRONG_PASSWORD :
            connect_fail_message = "Invalid PASSWORD"
            break
        if status == network.STAT_NO_AP_FOUND :
            connect_fail_message = "Invalid SSID"
            break
        # Some versions (pico w) don't have this return value
        #if True :
        if hasattr (network, 'STAT_WRONG_CONNECT_FAIL') :
            if status == network.STAT_WRONG_CONNECT_FAIL :
                connect_fail_message = "Wrong connect FAIL"
                break
        if status == network.STAT_IDLE :
            #print ("Idle")
            continue
        # Shouldn't be here???
        connect_fail_message = "Unknown status:" + str (status)
        break

    print (connect_fail_message)
    wlan.active(False)

Displayed output:
connecting to WIFI: Crema guest
SSID:Crema guest PW:Happy2024!
status: 1
... repeated 15 times
status: 3
Connected: ('192.168.1.50', '255.255.255.0', '192.168.1.1', '192.168.1.1')

After setting the password to "Error" (1st line) the connection still succeeds:

Displayed output:
connecting to WIFI: Crema guest
SSID:Crema guest PW:Error
status: 1
... repeated 8 times
status: 3
Connected: ('192.168.1.50', '255.255.255.0', '192.168.1.1', '192.168.1.1')

Seems like it doesn't use the password after a good connect. I don't think this happened in the previous MP release.

This latest MP version now returns STAT_NO_AP_FOUND when the SSID is invalid. Good progress!

Curt

[sophiedegran]

Hi,
That's look normal.. in your wlan.connect you have to give the encryption you want authmode= ..
by default if you don't give the encryption it's open (bar!) ☺

[ctimmer]

I see your point but this is not open AP. A password is required.
Curt

[shariltumin]

Once connected to an AP, the connection will survive a soft reset. This is not the case with a hard reset.

MPY: soft reboot
MicroPython ...
>>> import network
>>> wlan = network.WLAN(network.STA_IF)
>>> wlan.active(True)
True
>>> wlan.isconnected()
True
>>> wlan.connect("dlink-1234", "sdfsdfsdfsdf") # Do nothing, already connected
>>> print(wlan.ifconfig())
('192.168.4.85', '255.255.252.0', '192.168.4.1', '192.168.4.1')
>>> wlan.disconnect()
>>> wlan.isconnected()
False
>>> print(wlan.ifconfig())
('0.0.0.0', '0.0.0.0', '0.0.0.0', '192.168.4.1')
>>> wlan.connect("dlink-1234", "sdfsdfsdfsdf") # wrong PWD
>>> wlan.isconnected()
False
>>> wlan.isconnected()
False
>>> wlan.isconnected()
False
>>> wlan.isconnected()
False
>>> wlan.disconnect()
>>> # try to connect again with the correct password

The wlan.connect() will set the wifi:sta to the "connecting" state, wlan.disconnect() will cancel it. You can then try wlan.connect() again.