A chat system using the Micro:Bit for communication

microchat.py

from microbit import *
import radio

uart.init()
radio.on()
uart.write("\r\nWelcome\r\n")
while True:
    input = uart.readline()
    if input is not None and len(input) > 0:
        uart.write(str(input,'utf-8'))
        radio.send(str(input,'utf-8'))
        display.show(">")
    msg = radio.receive()
    if msg is not None:
        uart.write(str(msg).replace('\n', '\r\n'))
        display.show("<")