Send and Receive Packets

The sender micro:bit and receiver micro:bit each have their own project, and they must be running at the same time.

• Connect two micro:bit modules to two USB ports with two USB cables.
• Open two separate browsers and navigate both to makecode.microbit.org.
• Open two more with both going to Google Chrome Labs Serial Terminal.
• Use the web editor Connect buttons to set up serial connections with each micro:bit in both the makecode tabs and terminal tabs.

See Texting with Terminals if you need a reminder on how to set up the serial connection to the micro:bit modules. 

• If you are part of a class and have been assigned a channel, make sure to adjust the project’s radio set group (7) to your assigned channel before you flash the projects.
• Enter and flash the sender project countdown_sender into the sending micro:bit.
• Enter and flash the receiver project countdown_reciever into the receiving micro:bit. It’s below the countdown_sender project.

Example Sender Project: countdown_sender

Example Receiver Project: countdown_receiver

• Go to the terminals in both browsers, make sure that local echo is checked, and reset both micro:bit modules.
• Follow the prompts in the sender micro:bit’s terminal for entering the countdown start value and the message to display afterward.
• Check the receiver micro:bot’s terminal and verify that it completes the countdown and displays the message you entered.