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4) Test Result
Send the test code to micro:bit main board, then insert the micro:bit main board into the car shield and connect
a 18650 battery, turn the POWER switch ON.
When your phone's APP is connected to Bluetooth module, the built-in LED matrix on the micro:bit main board
should show the heart shape. If connection failed, it will show a smile face.
Bluetooth connected, you should be able to control the movement of micro:bit robot car using APP.
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