![relay - How should I connect the RX and TX pins of an Arduino to a Bluetooth module? - Electrical Engineering Stack Exchange relay - How should I connect the RX and TX pins of an Arduino to a Bluetooth module? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/lyf4U.jpg)
relay - How should I connect the RX and TX pins of an Arduino to a Bluetooth module? - Electrical Engineering Stack Exchange
Can we use the analog pins of Arduino for receiving the data from sensors or modules like ultrasonic sensor and Bluetooth module? - Quora
![Arduino Bluetooth HC05 Tutorial | Controlling LED Over Bluetooth Module Hc05 With Arduino : 4 Steps - Instructables Arduino Bluetooth HC05 Tutorial | Controlling LED Over Bluetooth Module Hc05 With Arduino : 4 Steps - Instructables](https://content.instructables.com/F96/1OYG/K1HXU489/F961OYGK1HXU489.png?auto=webp&fit=bounds&frame=1)