Hi: I ordered 10 Gemma M0's last week, 5 of them won't power on at all (even flipping onboard on/off switch back and forth), 1 won't present USB (but does power up including the dotstar multicolored LED), 4 actually show USB.
Is there a trick to powering them on? I've got the 2x 2032 button cell pack and a charged Adafruit 150mAh LiPo battery pack, and powering from USB, and am seeing consistent behavior no matter which power source I use.
5 new Gemma M0s won't power up
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- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: 5 new Gemma M0s won't power up
There is a small on/off slide switch on the Gemma M0 can you confirm that is set to the on position?
Since you are seeing all but one over USB these units all have likely been programmed.
Since you are seeing all but one over USB these units all have likely been programmed.
- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
I have put the on-off switch in both positions (on and off) several times, no joy whatsoever as far as seeing them power on.
I saw the 4 that would power on via USB. None of the rest show up in USB. Do they come programmed out of the box, or not? I still have all the bags from them.
I saw the 4 that would power on via USB. None of the rest show up in USB. Do they come programmed out of the box, or not? I still have all the bags from them.
- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
If not programmed, do I need to program them, maybe via the Arduino IDE? Seemed like these should be CircuitPython out of the box?
- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
The guides I found associated with the Gemma M0 product page seemed to suggest that CircuitPython is the OOTB configuration. Is that what should I expect?
- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: 5 new Gemma M0s won't power up
Can you post a single photo of all the pink bags (or just one photo if they are identical). That can be helpful for tracing the batch if there was a assembly issue.
The boards normally ship with firmware for the bootloader installed and Arduino code. If you see a CIRCUITPY drive on startup then CircuitPython is installed.
Which would you prefer to use CircuitPython or Arduino code? It would be helpful to have you upload a basic blink program for either platform to determine if these boards need to be returned.
The boards normally ship with firmware for the bootloader installed and Arduino code. If you see a CIRCUITPY drive on startup then CircuitPython is installed.
Which would you prefer to use CircuitPython or Arduino code? It would be helpful to have you upload a basic blink program for either platform to determine if these boards need to be returned.
- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
I've got existing code for Arduino that would be easiest to use. I have 9/10 bags, looks like P3501 top right, W17205-A under the big bar code.
- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
So, I was able to get blink running on one of the boards that does power up and shows a USB serial port in Arduino IDE, but the original one that powers up isn't creating a USB serial port at all.
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- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
I was able to re-program the one that powered up but wasn't showing a USB port through the double-tap reset. But I still have 5 that don't even power up (no LEDs flash ever)
- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
Latest inventory, I can confirm I have 3 working, 6 non working (and I'm assuming a 10th probably still in its bag here somewhere.
- Seanbseanb
- Posts: 9
- Joined: Tue Feb 28, 2023 11:39 am
Re: 5 new Gemma M0s won't power up
Found the 4th working. So 4 good, 6 not working.
- mikeysklar
- Posts: 13936
- Joined: Mon Aug 01, 2016 8:10 pm
Re: 5 new Gemma M0s won't power up
Nice progress and thanks for the bag picks.
The six non-working. Do you see a USB device on plugin or with the double reset?
The six non-working. Do you see a USB device on plugin or with the double reset?
Please be positive and constructive with your questions and comments.