Issue with uploading to MoteinoUSB (stk500_recv(): programmer is not responding)

[VMertens]

Hello,

I'm really new in this and you might help me :
I have a MoteinoUSB R5 and I can't upload any sketches on it anymore (whereas it was working in the past). I don't know what happened. Here is the message I got in the Arduino software :
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00


I guess the problem is not coming from the Arduino software / drivers / computer (mac) as I can still upload sketches on another board (Moteino R4 through FTDI Adapter).

When I connect VIN and GND pins of the MoteinoUSB to a 5V source (not through USB), the MoteinoUSB does not seem dead as I can measure voltage out of pin 3V3. Also, when I try a reset (RST pin connected to ground), the LED flashes (and then nothing). I can't check if the sketch is running because the last uploaded sketch has no LED flash instructions...

I suppose the problem comes from the serial rx/tx transmission...

Could anyone help ?

Thanks in advance !


VM.

[Felix]

Some reasons that I can think of:

- Moteino is fried/damaged or bootloader damaged/erased
- USB cable too long or unshielded/too long - although with R5 this should be much less of an issue

Can you try another cable? Can you try another PC/computer?
Can you verify the "3.3" pin has 3.3V on it?

[VMertens]

Hi Felix, thanks for the quick answer.

I tried different USB cable lengths (1.5m and 0.1m) but same result...
I measured voltage on the 3.3 pin : it has 3,3V on it.

How can I check whether the Moteino is fried or bootloader damaged ?
If that happened, is there any way to reset the Moteino ?

Thank you again for the support.

VM.

[Felix]

You would need an ISP programmer