import machine
import ubinascii

mac = ubinascii.hexlify(machine.unique_id())
print(mac)

# Print it prettier
macpretty = mac[0:2] + ':' + mac[2:4] + ':' + mac[4:6] + ':' + mac[6:8] + ':' + mac[8:10] + ':' + mac[10:]
print(macpretty)