Issues with HC-05 Bluetooth Module connection with Nano

Hi All,

I'm having an issue with using my HC-05 bluetooth module with an Arduino Nano Every. I am new to arduino so to start the project I followed this tutorial (Bluetooth Arduino RECEIVE data + Chart - YouTube) and was able to get the HC-05 to work with my Uno. I then tried to move everything over to a nano in order to reduce the form factor. I used the same pins and same exact code as I did with the uno but nothing seems to be getting to the phone when I use the nano. My best guess is that it has something to do with the TX and RX pins. One thing to note is that you are supposed to get an error when trying to upload while a device is connected to the TX and RX pins but I am not getting that error even with the HC-05 connected to the nano. Any help on this would be greatly appreciated.

Thanks in advance.

On the nano EVERY you have a second hardware serial port.
Serial is through the USB connector.
Serial1 is RX and TX, (PC5,PC4) and is available independently and concurrently. Use Serial1 for communication with the HC05. Remember to cross the RX/TX pins. Module RX goes to nano TX and module TX goes to nano RX.

1 Like