48ss10 / microbit-scratch-ble

Bridging between micro:bit and Scratch 1.4 via Bluetooth Low Energy

microbit-scratch-ble

Bridging between micro:bit and Scratch 1.4 via BLE (Bluetooth Low Energy) using Remote Sensors Protocol.

Based on the work of Alessio Ciregia (https://github.com/alcir/microbit-ble).

Tested on the Raspberry Pi and Lubuntu 18.04

Raspberry PI

• Raspberry Pi 1 Model B with
• Bluetooth dongle BT-Micro4
• Raspbian Stretch

Lubuntu 18.04

• ThinkPad X40
• Bluetooth dongle BT-Micro4
• Lubuntu 18.04

Access Bluetooth services on micro:bit

MakeCode blocks on micro:bit

Note that the accelerometer value notification and the gesture notification are mutually exclusive. To get the accelerometer values, you must add the bluetooth accelerometer service block. To get the gestures, you must remove the bluetooth accelerometer service block.

Scratch program (sample)

Note that the variable light-level-period needs to be global ("For all sprites").

Python program

Run after enabling remote sensors on Scratch.

$ python microbit-to-scratch-via-ble.py XX:XX:XX:XX:XX:XX
(XX:XX:XX:XX:XX:XX is the device address of your micro:bit.)

Other references

• bluepy
• Scratch Python Module
• micro:bit Bluetooth profile specification

License

• These derivative works are placed in the public domain.
• There's no warranty.