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Shop bluetooth module using arduino tx and rx

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$2.75
HC-12 SI4438 433Mhz Wireless Serial Module 1000m Range W/Antenna Replace Bluetooth For Arduino DIY
AliExpress
$2.75
HC-12 SI4438 433Mhz Wireless Serial Module 1000m Range W/Antenna Replace Bluetooth For Arduino DIY
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3.7-5V Mini Bluetooth Stereo Audio Receiver Board Module With Mic For Arduino MP3 Player Bluetooth
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ESP32 Devkitc WIFI+Bluetooth Development Board WIFI Module With 2.4G Antenna Optional ESP32
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