4 IN 1 Wireless Module kit for Arduino include ESP8266 + HC 05 + nRF24L01 + BLE CC2541 Arduino Compatible|kit manicure|kit footballkit pic - AliExpress
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Hc-05 Bluetooth Wireless Module With Connection Base (6 Pin) For Arduino. - Electronics Stocks - AliExpress
serial - How to use Arduino Bluetooth module? - Electrical Engineering Stack Exchange
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Arduino BLE
Track Everything, Everywhere With An IoT Barcode Scanner | Hackaday
CHITENG CT652W 2.4G Wireless Barcode Scanner Powerful Decoder Chip Accurate Identification for Supermarket Store Warehouse - Walmart.com
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Bluetooth Low Energy Tutorial with HM-10 BLE 4.0 & Arduino
