Circuit diagram to connect Bluetooth module HC-05 with NodeMCU ESP8266 is very simple and shown below: An external Bluetooth module is needed with ESP8266 as it doesn’t have inbuilt Bluetooth like ...

Bluetooth transmission of LK8EX1 sentences with a HM-11 bluetooth module. You can then use flight instrument ... The silkscreen markings for the ESP8266 UART are for the connecting component. RXD ...

There’s also an “ESP8266 IoT SDK”, but from a quick glance at the code, this appears to be an SDK for the SOC on the module, not a simple way to connect the module to a microcontroller.

The prototypes are based on a) Bluetooth module, b) Low Energy Bluetooth module and c) ESP8266 Wi-Fi module. The client side implementation is developed by the application of JavaScript. Node.js was ...