Can't get Sigfox ID and PAC from Lopy4

  • Hi all,

    I have a Lopy4 card installed on a Pytrack2.0. I updated the firmware of the Lopy4 (did not upgrade firmware of Pytrack 2.0 as requested). But I do not seem to get the sigfox ID and PAC. What am I doing wrong?![alt text](Screenshot 2020-11-03 at 23.06.16.png image url)

    Thanks for your help

  • I have the same problem.

    I am using the Pycom firm update to update new firmware for my Sipy.

    But it got stuck after I've chosen the country (Singapore).



  • Hi @Gijs,

    Thanks for all ! Operation OK. I get the Sigfox ID and PAC now.


  • Hi,
    It seems your device is not explicitely recognized as a Lopy4 (note the difference in screenshots: Please use the Firmware updater in online mode to retrieve the Sigfox PAC and ID, and do not submit a file manually, but rather let the tool get it from our software server. This way, it will / should also update the Sigfox PAC and ID if you previously removed it from the device (using for example erase all and/or erase config / nvs partitions).

    Next to that, I recommend to update to the latest stable firmware version (1.20.2.r4), though if your course recommends something different, you can always downgrade to that version.

  • Hi @Gijs ,
    I use updater tool and at the end of the operation, I get Device ID and LoRa Mac displayed but not SigFox


    I use the latest version of Firmware updater tool (1.16.5) and th choice of this firmware is as recommended in a learning course

    Hope this enough to describe my problem

  • If you use the firmware updater tool, it will give you the SigFox PAC and ID in the last screen as mentioned in the documentation page I linked in. Please elaborate on what is not working for you.

  • Hi @Gijs,

    Can u help me because I'm facing the same issue. I can't get Sigfox Id and PAC with Lopy 4 ('ffffffff' instead). Already trying to update firmware (now with 1.20.1). I'm using Windows version of updater tool.


  • Hi Gijs,

    I've got the same problem with a new Lopy4 I've just bought. I already try method that works (using firmware 1.20.1, updating with latest Windows version of Pycom Firmware Update tool)

    Can u help me, regards, Olivier

  • @Gijs Hello :)

    Thank you for your answer. I got the ids with the firmware updater.


  • Hi,
    You should be able to get them using the firmware updater tool as shown here:

  • Hello,

    I am facing the same issue. I just bought the lopy4 and it's impossible for me to get the sigfox id and pac number.
    Could you please enlighten me here ?

    Thank you,


  • Hi,
    This happens when you clear the CONFIG and NVS partitions on firmware upgrade. Normally they would be restored to the sigfox IDs as we keep a backup of them, but if the firmware updater tool has no internet connection, we can unfortunately not do that.

    Edit: Can you privately DM me the WMAC of your device?


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