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!