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Cat-M1 + GNSS Unit has no GPS GNSS option.

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  • H
    HWTaro9
    last edited by Jul 24, 2022, 8:51 PM

    According to the docs page the Cat-M1 + GNSS unit supports GPS, but in UiFlow the only options are GLONASS (Russia), BEIDOU (China), GALILEAN (Europe), and QZSS (Japan), and I'm in the US and I need to use GPS.

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    • F
      felmue
      last edited by felmue Jul 25, 2022, 3:08 PM Jul 25, 2022, 7:05 AM

      Hello @HWTaro9

      I think you can choose any of the four options as GPS is always included by default. From the SIM7080 AT command document:

      AT+SGNSCFG="MODE",<mode>
      0 start GPS and GLONASS constellation
      1 start GPS and GALILEO constellation
      2 start GPS and BEIDOU constellation
      3 start GPS and QZSS constellation

      Thanks
      Felix

      GPIO translation table M5Stack / M5Core2
      Information about various M5Stack products.
      Code examples

      H 1 Reply Last reply Jul 25, 2022, 9:01 PM Reply Quote 0
      • H
        HWTaro9 @felmue
        last edited by Jul 25, 2022, 9:01 PM

        @felmue Thanks! so if I don't use the block that sets what constellation it uses, it will default to just using GPS, right?

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        • F
          felmue
          last edited by felmue Jul 26, 2022, 10:58 AM Jul 26, 2022, 2:18 AM

          Hello @HWTaro9

          I just ran below three blocks and monitored the AT commands they would send to the modem (w/o the modem actually stacked / connected to the M5Stack):

          GNSS power control 'on' -> AT+CGNSPWR=1
          GNSS work mode 'GLONASS' -> AT+CGNSMOD=1,1,0,0,0
          GNSS NMEA poll task -> AT+CGNSINF

          This means that the AT command AT+SGNSCFG=<MODE> I mentioned before is not part of these three blocks.

          BTW: checking the work mode on my SIM7080 for the first time returns:

          AT+CGNSMOD?
          +CGNSMOD: 1,1,0,0,0
          

          which means GPS and GLONASS are enabled. And since this command's parameter saving mode is AUTO_SAVE_REBOOT I would assume that this is the default.

          In other words if you omit the work mode block I'd assume GPS and GLONASS are enabled by default.

          Thanks
          Felix

          GPIO translation table M5Stack / M5Core2
          Information about various M5Stack products.
          Code examples

          H 1 Reply Last reply Jul 26, 2022, 8:05 PM Reply Quote 0
          • H
            HWTaro9 @felmue
            last edited by Jul 26, 2022, 8:05 PM

            @felmue Thank you very much!

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