Is my Duet2wifi dead?
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Hello
I definetly damaged my Duet2wifi 1.03 by ESD (I saw the spark, and it stopped to work). Wifi module was started to getting hot, 5v line dropped to 4v.
I removed SD card and desoldered wifi, after this operation board was kind of functional. After connecting to usb it freezed and diag led was on permently (and there were no action after pressing reset button) Once on 10 maybe 20 trays it was booting normally, I was able to connect to it via Yat, send commands and received responses.
I decided to update firmware using fallback procedure #1 updating from 3.4.5 to 3.4.6. I copied Duet2_sdiap32_wifieth.bin and duet2combinedfirmware.bin to sd/firmware and ran m997 s0 command
Now diag led is on all the time, i am not able to hit this 1 on 20 try anymore. Board doesn't respond to reset nor erase button. After connecting to pc via USB system doesn't see board.
Is there any chance I can try something more to recover this board? -
@Buhefade It does sound rather terminal. The WiFi and SD card often take the first hit to an overvoltage on the 5V or 3.3V circuits, but they can only do so much to protect the MCU. And in this case, it does rather sound like it has damaged the MCU. How did the ESD event occur?
Ian
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Dry air + flip-flops + printer on casters + wifi module near the place where it's convinient to grab the frame
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Assuming uc is dead and after successful replacement should I be able to program virgin uc with just usb, following fallback procedure #2?
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The replacement board would already have firmware on it. Better to just get it connected to the network and update the firmware via DWC.
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@Buhefade said in Is my Duet2wifi dead?:
Assuming uc is dead and after successful replacement should I be able to program virgin uc with just usb, following fallback procedure #2?
Assuming you mean you are thinking of replacing the microcontroller, for Duet 2 you can indeed program a virgin MCU using Bossa.
Have you checked the 5V and 3.3V rail voltages since removing the WiFi module and SD card? Does the microcontroller or the 3.3V regulator get hot?
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Hello, sorry for delay
3.3v regulator survived (suppriaingly)
With wifi module desoldered nothing was getting hot.
uC replaced, programming using fallback procedure #3 bossa went flawlessly.
I disabled wifi section in coning file (not sure if this was necessary) and board works with uart only.
Warting for new wifi module. I will take opportunity to upgrade to esp-07s.
I will post updates.
