VMA302 HC-05 Bluetooth module


The user manual for this module indicates that it can be wired directly to an Arduino, but on-line souces generally say something like:

“However, the logic voltage level of the data pins is 3.3V. So, the line between the Arduino TX (Transmit Pin, which has 5V output) and the Bluetooth module RX (Receive Pin, which supports only 3.3V) needs to be connected through a voltage divider in order not to burn the module.”

I’m not having any luck with my kit in the advised configuration:
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x09

Any advice would be gratefully received!



There are two ways to hook up the bluetooth module to Arduino.

One with 5V power supply and TX arduino to RX on HC-05 module, and RX arduino to TX HC-05 module.

like this:

Bluetooth basics: HC-05 circuit / code

other connection is via voltage devider 3,3V and TX and RX pins on arduino.
like this, see instruction in link:

HC-05 Bluetooth connection


Velleman Support team.


Hello Velleman Support teams,

Does VMA302 HC-05 Bluetooth module has indicator light?
I have no luck to use this module, I am neither getting indication light nor detecting the Bluetooth module. I have tried both wiring methods.
If the module has a built-in indicator light, them mine must have burnt out before even using it.

Thank you,