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(4) Connection Diagram
1. STATE: state test pins, connected to internal LED, generally keep
it unconnected.
2. RXD: serial interface, receiving terminal.
3. TXD: serial interface, transmitting terminal.
4. GND: Ground.
5. VCC: positive pole of the power source.
6. EN/BRK: break connect, it means breaking the Bluetooth
connection, generally, keep it unconnected.
(5) Test Code
/*
keyestudio Mini Tank Robot v2.0
lesson 7.1
bluetooth
http://www.keyestudio.com
*/
121
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