discord_printer.py

from Discord.discord import Client
from thermal_printer import ThermalPrinter
from machine import UART
from uio import BytesIO
import btree

uart = UART(2,19200)
uart.init(19200, bits=8, parity=None, stop=1)
printer = ThermalPrinter(uart,auto_warm_up=False)
db = btree.open(BytesIO())

cl = Client()
db['listen_channel'] = ""

def listen(msg):
    db['listen_channel'] = msg.channel_id
    printer.print("!Selecting channel {}".format(msg.channel_id))
    #cl.send(msg.channel_id,"Printing the messages from this channel")
cl.add_command(listen)

def on_message(msg):
    if msg.channel_id == db['listen_channel'].decode("utf-8"):
        print("Printing message")
        printer.print("<{}> {}".format(msg.author.name,msg.content))
cl.on_message_event(on_message)

printer.print("Starting discord printer...")
cl.start("TOKEN GOES HERE")