MicroPython Forum (Archive)

Dear MicroPython friends,

Today I received my Pyboard v1.0 and was excited to try MicroPython for the first time.

Unfortunately, I have the following problem: I can flash the Pyboard with new firmware ... but in every other aspect it is dead and does not respond. The red, yellow and blue leds are shining.

What I have done, step-by-step (on Ubuntu 18.04):

1. Connected the DFU and V3V pins.
2. Connected the micro USB cable -> The red led shines. Visible in lsysb and by dmesg.
3. Downloaded the latest release for v1.0 on https://micropython.org/download
4. Ran the command "python pydfu.py -u pybv10-20190125-v1.10.dfu" with no errors. The red, yellow and blue leds shines up.
5. Disconnected the micro USB cable.
6. Disconnected DFU and V3V.
7. Connected the micro USB cable again -> The red, yellow and blue leds shines.
8. The Pyboard can't be seen on Ubuntu 18.04, not in /dev or by lsusb or by dmesg.

Then I repeated the steps 1-8 again with dfu-util and also with different firmware versions:
* pybv10-20190125-v1.10.dfu
* pybv10-20170526-v1.9.dfu
* pybv10-20170108-v1.8.7.dfu
but still the same problem.

Then I tested to follow the "Factory reset the filesystem" instructions. But the leds does not start to cycle. The red, yellow and blue leds shines continuously not matter what I do with the user/reset buttons.

I have also tried different USB cables and different USB ports.

Finally, I connected it to a Windows computer, but not visible there either.

In the worst case I will have to buy a new one ... but the v1.1 version is currently out of stock.
I just feel very sad.

Thank you

It is unlikely that you broke the device. Maybe it is simply the wrong firmware. If you got the PyBoard v1.0 lite, the you have to flash the firmware for that device. http://micropython.org/resources/firmwa ... ae33b7.dfu

Thank you Robert,

You are completely right. I feel a bit embarrassed for not knowing which device I had. I should have figured that out. Thank you again!

Try the following:
1. Jumper P1 (Boot0) to X15 (3V3)
2. Plug USB into Windows computer.
3. You should get a ding ding noise if USB recognised.
4. Look in device manager. You should see STM32L4 device in DFU mode listed, probably under USB.

If that works your STM32 chip and USB port are ok and you should be able to flash new firmware.

Did the board work before you tried to reprogram it?

What do you mean by UDF? That's not a pin label on official pyboard.

It is working perfectly after I flashed it with the Pyboard v1.0 _lite_ firmware. Yes, sorry, I mean DFU, my mistake. Thank you