Another good exercise uses the inbuilt radio to let two Micro:bits communicate with each other. Me and classmate Max (blogs.brighton.ac.uk/maxmalepd) worked together to get our Micro:bits to communicate.
Here you can view the code and also switch to simulation view to see how it works.
This kind of program can be edited to use Micro:bits as remote controllers if instead of displaying text when the signal is received it activated an output.
One initial complication we had was that we didn’t set a radio group, this needs to be done so that the Micro:bits are communicating in the same group.
Max’s writeup of the same project can be found here: blogs.brighton.ac.uk/maxmalepd/electronics-design-2/
The link below is the code for two Micro:bits to send a pattern to each other:
https://drive.google.com/open?id=1-4DMJbEUk5HxTYy5zpfQ8dPNiTIwzgOs
