Another guide how to wire the HCo6 and 4 Channel Relay for switching, The HC06 modules uses BlueCore is a single chip radio and baseband IC for Bluetooth 2.4GHz system including enhance data rates (EDR) to 3Mbps. for more details
Wiring ESP8266 WiFi Transceiver on Arduino with Relay
In this illustration we will going to wire the ESP8266 Module on Arduino but before we can proceed we need to setup the ESP8266 module using AT-COMMAND please refer to this link. As you can see the illustration below our