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Adafruit Feather nrf52840 Sense not responding on PC
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Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Tue Sep 21, 2021 7:39 pm

I am running CircuitPython on my Adafruit Feather nrf52840 Sense and it is not showing up on my PC. I tried to double-click the reset button and the device showed up as FTHR840BOOT, and when I tried to add the adafruit-circuitpython-feather_bluefruit_sense-en_US-6.3.0.uf2 file, the device no longer shows up. When I open Mu Editor, it detects a CircuitPython device, but I cannot upload any code or read anything from the device. If there is a way I can fix this through a factory reset or something, please let me know how I can do this.

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by adafruit_support_carter on Wed Sep 22, 2021 5:09 pm

Just to check, can you still get back to bootloader mode and seeing the FTHR840BOOT folder?

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Wed Sep 22, 2021 6:08 pm

Yes, upon double-clicking the reset button, the FTHR840BOOT folder shows up on my PC containing the CURRENT.UF2, INDEX, and INFO_UF2 files. If I try to upload the UF2 file mentioned above, the neopixel LED on the board turns red and the device is no longer visible on my PC. Also, if I leave the board alone for awhile, it does the same thing.

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by adafruit_support_carter on Thu Sep 23, 2021 12:41 pm

If you have another PC available, try doing the same thing there and see if you get similar behavior.

For the current PC, see here for some known potential issues:
https://learn.adafruit.com/welcome-to-c ... leshooting

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Thu Sep 23, 2021 2:12 pm

I tried another PC and got the same thing. I then tried erasing CircuitPython and reloading it onto the device using the REPL commands mentioned in the troubleshooting page, but it did not fix my issue. Now, I cannot access the board through REPL.

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by adafruit_support_carter on Thu Sep 23, 2021 2:22 pm

I then tried erasing CircuitPython

What exactly did you do here?

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Thu Sep 23, 2021 2:31 pm

I followed the steps shown in the attached image by using storage.erase_filesystem()
reset circuitpy.PNG
reset circuitpy.PNG (105.97 KiB) Viewed 456 times

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by adafruit_support_carter on Thu Sep 23, 2021 2:38 pm

So you were able to connect to the REPL at least once. And now you can not? Even if you go all the way back to getting FTHR840BOOT and copying over adafruit-circuitpython-feather_bluefruit_sense-en_US-6.3.0.uf2?

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Thu Sep 23, 2021 2:48 pm

Yes, exactly.

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by adafruit2 on Thu Sep 23, 2021 3:02 pm

worth asking - did you try 7.0.0 ?

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Thu Sep 23, 2021 3:18 pm

Yes, we just tried it, and it is still not working. I should mention that the board shows up in the device manager, but not in the file explorer. Also, Mu Editor is able to recognize it as a CircuitPython device, but is not able to communicate with it.

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Thu Sep 23, 2021 3:38 pm

For some reason, I was able to communicate to the serial, so I tried erasing the file system as mentioned above, but it did not seem to fix anything. However, when I tried loading something in Mu Editor, it asked me to insert a drive into (G:). Not sure if this means anything
mu insert disk.PNG
mu insert disk.PNG (90.95 KiB) Viewed 441 times

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by adafruit2 on Thu Sep 23, 2021 3:56 pm

do you by chance know how to use Arduino?

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by pnhoover on Thu Sep 23, 2021 3:59 pm

Yes. We were actually able to successfully run a simple blinky Arduino script on the device. However, we would really like to use CircuitPython since all the code we have written so far has been through that.

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Re: Adafruit Feather nrf52840 Sense not responding on PC

by adafruit_support_carter on Wed Sep 29, 2021 4:18 pm

Just to be sure - you've never been able to get CIRCUITPY to show up with this Feather? It's not that it once worked, but then stopped?

As another test, can you try installing this UF2 file. Just drag it to the FTHR840BOOT folder and see if you can get a CIRCUITPY folder to show up.
sense-no-ble-workflow.uf2
(936 KiB) Downloaded 1 time

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