I got a makeblock Bluetooth module, in the bottom side it has 7 pins, at one side it has TX RX GND VCC, and at the other side, it has 3 pins, DTR NC RST. My question is related to these 3 pins. I know than the NC one is not used, but what about DTR and RST? What are used for? , And how to connect it to an Arduino uno board.?
Thank a lot
The DTR is date terminal ready pin, the RST is Reset pin.
When you use the Bluetooth module with Arduino, you can use this module as a normal Bluetooth which only need pin VCC, GND, Tx, Rx.
And what about sending AT commands to the module using the Arduino IDE serial monitor. Is it possible? Do I need to wire it different?
Thanks once again.
I am afraid the Arduino serial monitor doesn’t support send AT commands to the Bluetooth module. You may need use the Serial debugging tools to send AT commands to it.