Receive data from ARDUINO (HC05/06 or others) to B4A ESPECIALLY in bluetooth | B4X Programming Forum
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HC-05 HC05 Bluetooth Transceiver Module 2.4G RF Wireless Industrial Bluetooth module RS232 / TTL to UART converter 6PIN - AliExpress
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Controlling the Brightness of LED Using Arduino and Bluetooth Module(HC-05) : 4 Steps - Instructables
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Bluetooth HC-05 connected to HC-06. Standalone. Turn on/off LED. Experiment - Tutorials and Guides - MIT App Inventor Community
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Amazon.com: 5PCS HC-06 RS232 Wireless Bluetooth Serial Port 4 Pin RF Transceiver Board Module Bi-Directional Serial Support Slave and Master Mode : Electronics
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