Aug 2026

When dealing with Wifi networks, or networks in general, especaially if your WIFI has MAC Address filtering enabled, you will need the MAC Address of your Pico(s).

A MAC Address is a 6 part address that looks like so:

• 88:a2:9e:01:49:57

The first three numbers are to identify the manufacturer, the last 3 numbers are for the ID of the device. In a layer 3 network (most networks now) we generally use the IP Address of the device, but in purely Layer 2 networks then the MAC addresses are used.

As with most things Pico/Network we need a Python script. See an example below:

| download

import network
import ubinascii
 
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
 
print(ubinascii.hexlify(wlan.config('mac'), ':').decode())

Save the above code to your Pico as find-mac-address.py