With unidirectional RF text working, the next step is bidirectional texting. Each micro:bit transceiver (transmitter/receiver) will take input that you type into its terminal and send it through the radio.  Each micro:bit will also receive radio messages and print them to the terminal.

IMPORTANT: The Send: prompt will not appear until you click inside the terminal and start typing.

Example script: terminal_chat_through_microbits

• If you are in a classroom, pair off and use your assigned channel.
• Enter, save, and flash the program below into the first micro:bit module (Transceiver A).
• Update the first print statement,  changing  print("micro:bit transceiver A")  to print("micro:bit transceiver B").
• Flash the script into the second micro:bit module (Transceiver B).
• Have fun typing messages to each other!

# terminal_chat_through_microbits
# learn.parallax.com/cyberbot
# Copyright Parallax Inc 2020 under MIT license

from microbit import *
import radio

radio.on()
radio.config(channel=7)

sleep(1000)

print("micro:bit transceiver A")

print("Type messages, press enter to send.")
print("Received messages will also be displayed.")

while True:
    if uart.any():
        tx = input("Send: ")
        radio.send(tx)
    message = radio.receive()
    if message is not None:
        print("Receive: ", message)

Transceiver A

Transceiver B