Micro:bit radio security

Ship #1 Pending review

@Maxwell-l-hack on Micro:bit radio security · 1 day ago

I made a program for micro:bits that uses their radio to show how you could channel hop on their frequencies with a scrambled next channel number using a pre-shared key. It was fairly challenging to get the channel hopping working smoothly and having them communicate so that they would change channels together and avoid the headache of changing at separate times. By the end, however, I was really quite proud of getting the channel hopping working and doing something more advanced to showcase what the micro:bit can do. Anybody who wants to try this you’ll need two micro:bits and I’m not sure if it will work on v1s as I only have v2s.

5 devlogs
9h

Try project → See source code →

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@Maxwell-l-hack on Micro:bit radio security · 3 days ago

3h 6m 32s logged

Finally got the infinite channel jumping working along with scrambling the channel number for greater security during transmission. Also added security features explanation to the README. And made a logo.

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@Maxwell-l-hack on Micro:bit radio security · about 2 months ago

1h 11m 54s logged

Got stuck when I tried to make it continuously channel hop and send a scrambled channel number, so I made the How to use section in the README along with a flowchart.

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@Maxwell-l-hack on Micro:bit radio security · 2 months ago

1h 55m 50s logged

The micro:bits finally channel hop, only once, however debugging took longer than I expected.

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@Maxwell-l-hack on Micro:bit radio security · 2 months ago

1h 48m 14s logged

I was having difficulty getting the ‘ready’ message to either broadcast or get received, maybe both, I’m not sure. I commented out those parts to test if the radio was working, and it did. It will also pick up the ready signal even if reset.

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@Maxwell-l-hack on Micro:bit radio security · 3 months ago

1h 25m 10s logged

Attempted to get the micro:bits channel hopping, however the confirmation is either not getting sent or received (maybe both), but I’m not getting any errors.