fifo_full message in BangleRun

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  • Hi,
    I have noticed that the BangleRun app does not seem to be able to acquire a GPS fix or measure heart rates. When the app starts up, the green hrm LED briefly lights up (presumably per the call to Bangle.setHRMPower(1) in the app), but then goes off almost instantly. For a brief moment, the message 'fifo_full' flashes on the bottom of the screen in red and disappears. Furthermore, the GPS receiver never seems to acquire a position fix (admittedly I only waited - outside, with a clear view of the sky - for about 10 minutes, but other apps demonstrable get a fix more quickly; incidentally is every call to Bangle.setGPSPower(1) a cold start or a warm start of the ublox chipset?).
    I don't know if these two events (the fifo message and the turning off of the hrm) are related, but I suspect they might be.
    I am running firmware version 2v05.171.
    Any advise on what might be causing this?
    Thanks,
    Marko

  • Quick update:
    I was able to get it to work by starting up the hrm one second after GPS startup (via 'setTimeout') and by reducing the calls to 'draw()' to once a second (instead of every 500ms; not sure if this second change was strictly necessary).
    It seems that the system gets overwhelmed when too many potentially call-back producing services get started simultaneously?

  • Hi - there was a recent issue with the 'FIFO_FULL' message appearing which got fixed yesterday, so that'd probably your issue. It was harmless though - just warning that some 'raw' NMEA GPS data got lost (but the app was never looking for the raw NMEA data so it didn't matter).

    The actual GPS coordinates are parsed in an IRQ so are never lost regardless of whether there's a FIFO_FULL or not.

    is every call to Bangle.setGPSPower(1) a cold start or a warm start of the ublox chipset?

    It's a warm start, so should acquire a lot faster. Although the time taken depends on how long it's been since the last fix. If it's a day or two it'll be slower than if it was only an hour ago.

    Maybe you could try again with a totally standard BangleRun and just leave it a bit longer to get a fix?

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fifo_full message in BangleRun

Posted by Avatar for user113695 @user113695

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