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Background/aims:

I'm trying to get my Raspberry Pi Pico Wh connected to my mesh wi-fi network for a star wars themed notification light project I'm working on. I'm only able to get it connected when I specify a BSSID of the access point I want it to connect to. What I'd ideally like is to be able to give it an array of BSSID's of my access points and try them one-by-one until one works.

I've tried various ways of passing the BSSID value but I can only get it working when I hard code it. From what I've been reading using b"..." as a string converts it to a byte array so I suspect how I've been trying to pass it isn't valid? I'm not 100% sure though as I'm still new to Micropython/Python.

(Working) Hardcoding the BSSID:

After much trial and error this code works to connect me to an access point I specify with the BSSID.

import network

wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect("SSID", "Password", bssid=b"\x00\x11\x22\x33\x44\x55")

(Not working) When I pass the BSSID as a variable:

I have tried other ways to pass the value but this is the closest I've gotten to a like for like. This code - even though it is passing the same value - gives me an 'extra positional arguments given' error.

import network

wlan = network.WLAN(network.STA_IF)
wlan.active(True)

BSSID_office = ":00:11:22:33:44:55"
print('bssid=b"' + BSSID_office.replace(":",r"\x") + '"')
wlan.connect("SSID", "Password", ('bssid=b"' + BSSID_office.replace(":",r"\x") + '"'))

This gives me the following output and error:

bssid=b"\x00\x11\x22\x33\x44\x55"
Traceback (most recent call last):
  File "<stdin>", line 35, in <module>
TypeError: extra positional arguments given

I've also tried concatenating the bssid= with an unhexified value using the ubinascii.unhexlify function (as suggested here: https://forum.micropython.org/viewtopic.php?t=5261 which explains the exact same issue I'm facing) but that gets me a casting error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: can't convert 'bytes' object to str implicitly
earthanmoon
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  • Note that "\x12" is an escape sequence in Python (and many other languages) that generates a single byte with value 0x12 (also known as 18). You can't just make a string with "\x" in it and concatenate it with a string that has some numbers and expect to get the same result. When in doubt, print your strings/bytes/whatever to the console using `print(repr(some_string))` to see what you have. – David Grayson Mar 05 '23 at 06:37

0 Answers0