Bluetooth module (JDY-30)

Hello,

For my project (building as robot) would I like to control it via Bluetooth. For this I bought a Bluetooth module with the name or address JDY-30, but i have some problems with it. firstly when I connect the module to the arduino and send something, I don’t see it in the serial monitor. Tried various baud rates (38400, 9600 and 115200) but still nothing. Then I did some research and found that you can communicate with the module by typing AT and AT+. When I tried to type this it would disappear in the serial monitor. The only time I got something back was when I put the sketch baud on 9600 and the serial monitor on 38400. Then the answer it gave back was: ?xxxx???xxx??x (Question marks were backwards). So my first taught was that the board was broken. I tried a different one but had the same results. The last ting I tried was to connect the TX and RX pins together to see if the board works and downloaded a Bluetooth terminal on my phone. The results were positive because the things that I send I immediately got send back, so I knew that the module is working. I have set the serial monitor to both NL as CR but this doesn’t help.

I am very new to this so maybe it is something stupid but I hope someone will have an answer for me.

Thank you in advance.

JoesWez:
I tried was to connect the TX and RX pins together to see if the board works and downloaded a Bluetooth terminal on my phone. The results were positive

Quite a good move, and a likely problem is that you don’t know how to connect it to Arduino - Tx>Rx and Rx<Tx.

You might find the following background notes useful.