HC-05 Wireless Bluetooth Receiver RF Transceiver Module Serial Port Transmitter Module
VCC: positive power supply
GND: power supply is negative
RXD: the receiver, Bluetooth module receives from another device sent data; normally connected to other devices transmitting end TXD
TXD: sending end, the Bluetooth module to send data to other devices; receiving terminal is normally connected to other devices RXD
Size: 37.5 mm * 16.5 mm * 4 mm(L * W * H)
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