Arduino Uno + RN-52

Other Hardware Audio
1

Hi everyone,

Im having issues in connecting the Arduino Uno to the Rn52 bluetooth device.

It rarely switches on, since i am new to this i cannot figure out what the problem is. My target is to make a bluetooth audio device.

I attacthed the RN52 and what I have done so far.

Thanks.

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2

Hello,
i'm working on a similar project, for me it will be a wireless car kit.
I have looked a little to your pictures, and i have some comments:

  • for the module to boott at power on, you should connect the PWR EN and 3.3 V pins. with them permanetly connected, you will have the module running at power on
  • keep in mind that Arduino UNO UART is 5V and RN 52 module is 3.3V, so this is not compatible, you need to use a step down regulator, like this one: https://www.sparkfun.com/products/12009. i've used the same one and works.
  • take a look ant the baud rate, by default RN 52 is 115200 kbps, so if you're trying to use the comunication over UART (like me) you should make your sketch according.
  • when communicating over UART, you shoud put GPIO 9 low.

for the moment i see no other issues, i attach you my simple sketch using an Trinket 3.3V and rn52 as a audio module. when pushing one button next track is playing. if you need extra help, do not hesitate.

sketch_nov30b.ino (456 Bytes)

3

Hi Johnny007,

Were you able to establish communication between Arduino Uno and RN52. If you could, can you please provide few details about the Arduino code and RN52 configuration. I am working on a similar project but unable to control RN52 using Arduino.

Cocacolacoke,
I have made the connections according to the three points in your comment (baud rate, 5V to 3.3V conversion and connecting PWR EN). Could you please help me understand the following?
-How is RN52 configured in your project?
-When RN52 is powered On I see both the green and red LEDs flashing. Can you communicate with Arduino in this state? Could you please provide more details about this?

Thanks in advance.