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BLE bluetooth 4.0 Serial Port Module cc2540 cc2541 Data Transparent Transmission Module Low Power Consumption

HC-06 bluetooth RF Transceiver RS232 With Backplane Wireless Serial 4P 4 Pin Module Board For Arduino

Nano Shield Atmega328P IO Sensor Wireless Expansion Board For Arduino

5dBi PCB UHF RFID Reader 902-928M Antenna 5cmX5cm with SMA Connector

PCF8591 AD/DA Converter Module Analog to Digital to Analog Conversion For Arduino