Help with crazy barometer

[checc0]

Hi. I'm using a Matek MQ8 on a GEP-20A-F4 AIO connected on a serial port in order to have (baro+gps+mag) in just one port.
I'm facing a strange issue where sometime the baro doesn't work and I can see on the sensor panel that the value "baro" is always off:

However sometimes the baro works and what I've noticed by looking at the debug trace that:

When the it works I've got values around (1700-2000) in the Barometer calibration complete debug line.. viceversa when doesn't works I get value 4433000 !

I've checked wires 1000 times.. tried with inav 2.6/3.0/31... same result !

What is the meaning of the value in the debug message "Barometer calibration complete (value)" ?
Why I'm getting those high values ?!?
Any idea ?

Thanks in advance !

[DzikuVx]

This will be fixed in 3.0.1. Until then, please insert SD card into SD card slot

[checc0]

Thanks ! But my board doesn't have any sd card !

[DzikuVx]

Then you have to wait until mid Juli when official fix will be released sob., 26 cze 2021, 13:42 użytkownik checc0 ***@***.***> napisał:

…

Thanks ! But my board doesn't have and sd card ! — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#7188 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHMBG42FNDOVNVMUHDEFULTUW4KRANCNFSM47KWKHLA> .

[checc0]

There is a fix for this in an upcoming release ? It's an issue already tracked ? If yes, could you kindly provide more info ?

[avsaase]

Yes this is fixed for 3.0.1

[checc0]

are you talking about this ? 47f2468

If yes, I applied the code to 3.0 but nothing changes :-(

[avsaase]

Please explain the exact step you took in #7163.

[checc0]

What I've discovered/tried so far:

1. Applying the code fix for the zero calibration issue described here (without success): 47f2468

2. Apply the following workaround (or I should say porkaround :-D ) in calibration.c:

int32_t baroCalculateAltitude(void)
{
if (!baroIsCalibrationComplete()) {
zeroCalibrationAddValueS(&zeroCalibration, baro.baroPressure);
//LOG_D(BARO, "Barometer pressure(%ld), alt(%ld), temp(%ld)", baro.baroPressure, baro.BaroAlt, baro.baroTemperature);
if (zeroCalibrationIsCompleteS(&zeroCalibration)) {
zeroCalibrationGetZeroS(&zeroCalibration, &baroGroundPressure);
baroGroundAltitude = pressureToAltitude(baroGroundPressure);
LOG_D(BARO, "Barometer calibration complete (%d)", (int)lrintf(baroGroundAltitude));

    }

    // FDE Porkaround  
    if (baroGroundAltitude > 90000) {
        fcReboot(false);
    }

    baro.BaroAlt = 0;
}
else {

...

Basically I'm forcing the fc to reboot if the zero calibration failed... i'm still investigating if it's related to an hw or sw issue.