Bluetooth module interfacing with esp8266: controlling an led Circuit module udvabony stereo Bluetooth esp8266 module hc circuit diagram interfacing connect nodemcu led shown below simple very connections
HC-05 Bluetooth Module - Tutorial, Arduino Interface - Tutorial
Hc-05 bluetooth module
Kcx bt001 wireless bluetooth 4.2 audio receiver module circuit board
Bluetooth circuit board audio module receiver circuits integrated wireless kcx stereo .
.