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Forum Sphere not powering on
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  • azurespherech
  • azure sphere
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Sphere not powering on

tvuylsteke
tvuylsteke over 6 years ago

I had been going through this sample https://www.element14.com/community/groups/internet-of-things/blog/2019/08/01/azure-sphere-starter-kit-advanced-tutorial

Everything worked in the end. let the device on all night, sending data to IoT Central successfully. I wanted to debug/understand why temperature readings on both sensors were around 34 degrees while I was expecting 20-25.

 

So I did some visual studio debugging, couldn't really find any issues, the calculation matches the sensor specs. Stopped debugging and as I recall, all leds on the device went dead. Been trying to plug it in/out a few times and once the led came up but went dead shortly after.

 

Any tips or tricks? As it seems the device is not powering on so the ports in windows aren't appearing either.

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  • peterfenn
    peterfenn over 6 years ago in reply to tvuylsteke +3 suggested
    Thomas To eliminate the computer for a moment from your debugging, try plugging-in a regular +5V phone charger (ie. one with a microUSB connector) If the green Power LED does not illuminate, I'd suspect…
  • peterfenn
    peterfenn over 6 years ago in reply to tvuylsteke +2 suggested
    Thomas Are you saying that the green power LED is also off? I'd suggest close Visual Studio for now, and do a quick check of the status of your starter kit, as follows: 1) Check that the VBAT jumper is…
  • peterfenn
    peterfenn over 6 years ago in reply to tvuylsteke +1 suggested
    PS: Review again the checklist at the " Troubleshooting installation and setup " page: https://docs.microsoft.com/en-us/azure-sphere/install/troubleshoot-installation
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  • tvuylsteke
    0 tvuylsteke over 6 years ago

    Any possible clues? I still have really no idea what could have gone wrong or how to get out of this situation. As far as I can tell I did nothing special to have end up in this situation... Is there any kind of reset possibilities are does no led == dead forever?

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  • peterfenn
    0 peterfenn over 6 years ago in reply to tvuylsteke

    PS: Review again the checklist at the "Troubleshooting installation and setup" page:

    https://docs.microsoft.com/en-us/azure-sphere/install/troubleshoot-installation

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  • tvuylsteke
    0 tvuylsteke over 6 years ago in reply to peterfenn

    Hey thanks for the suggestions. I had already checked those articles. And yep Jumper position was OK, didn't touch that one as well, but yes it's OK. Green powerled = dead.

     

    The weird thing: after removing the jumper and putting it back in the same place I could have sworn the leds worked for a few seconds. E.g. green and some orange ones. But then they faded again. I've tried different cables, different USB ports, different computer.... Bah no idea what I've done to make it useless image

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  • peterfenn
    0 peterfenn over 6 years ago in reply to tvuylsteke

    Thomas

     

    To eliminate the computer for a moment from your debugging, try plugging-in a regular +5V phone charger (ie. one with a microUSB connector)

    If the green Power LED does not illuminate, I'd suspect a possible hardware fault with the DC/DC regulator on your board

    More likely though, is your USB cable. The power management circuitry on the Starter Kit includes under-voltage detection

    A marginal USB power connection can cause an excessive voltage drop that will result in no 3V3 output, and that LED not being illuminated

    image

    PS: The full schematic is available for you to download at:
    AES-MS-MT3620-SK-G_SCH_2019-07-03

     

    -Peter

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  • peterfenn
    0 peterfenn over 6 years ago in reply to tvuylsteke

    Thomas

     

    To eliminate the computer for a moment from your debugging, try plugging-in a regular +5V phone charger (ie. one with a microUSB connector)

    If the green Power LED does not illuminate, I'd suspect a possible hardware fault with the DC/DC regulator on your board

    More likely though, is your USB cable. The power management circuitry on the Starter Kit includes under-voltage detection

    A marginal USB power connection can cause an excessive voltage drop that will result in no 3V3 output, and that LED not being illuminated

    image

    PS: The full schematic is available for you to download at:
    AES-MS-MT3620-SK-G_SCH_2019-07-03

     

    -Peter

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