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I have my Arduino Nano connected to the HC-06 module (with the RX/TX pins).

My issue is that when I try to upload new code to my Arduino (via the Arduino IDE, through the USB connection) the Arduino IDE doesn't succeed.

I get this error:

avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00

I believe that it is just trying to upload the code to the HC-06 (instead of the Arduino). Is there a way to overcome this issue?.

Thanks.

Note: I found this entry https://stackoverflow.com/questions/27175937/arduino-program-upload-while-btooth-module-connected-avrdude-stk500-getsync indicating that it wasn't possible (that I need to unplug the module). I am trying to confirm it.

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  • Your code might not work on leonardos/micros, but in any case they don't use pins 0 and 1 to upload so I believe you should be able to upload while the HC-06 is plugged in with either of those. Commented Apr 16, 2015 at 3:45
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    You might be able to electrically "remove" the blueooth module if it has a distinct reset line you can hold asserted, but unplugging it would be conceptually simplest. Commented Apr 17, 2015 at 3:52

1 Answer 1

Reset to default
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The link in question was correct... you do need to unplug it.

The Arduino's serial chip uses pins 0 and 1 to communicate with the ATmega 328 PU chip onboard, thus you have two independent devices connected to the same wires and both the Arduino main chip and the Bluetooth module are trying to communicate at the same time (rendering all data unreadable by the computer).

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