Demo video
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Problem and solving
Problem one: Microbit Bluetooth signal problem When testing the BLE based mesh data transfer, the Bluetooth signal tend to be very weak compare to other devices in the room. To solve the problem, I have tested the signal strength and the result is shown below. Figure 1: Bluetooth signal strength test result This situation also occurs in the connection between the pi and microbit. The connection could be very unstable and may easily disconnect when using.