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altitudeLowPass += 0.085 * ( last altitude from sensor - altitudeLowPass) ; altitudeHighPass += 0.1 * ( last altitude from sensor - altitudeHighPass) ; OpenXsensor calculates then a vertical speed making the difference between the 2 altitudes and applying a scaling parameter taking into account the...

look here:
https://github.com/openXsensor/openXsensor/issues/63
but this works only some minutes for me.

4. with Lua and serialread/write

With the X10 express upgrade module it is not possible anymore to connect a GPS-Sensor to the S.Port Pin to get the TX-GPS-Position. I have some ideas to connect a GPS: 1. could that be changed by OTX? 2. is there an free/usable UART to connect a simple Ublox GPS, like in x12 or T16 ? 3. can I build...

look also here:
https://github.com/opentx/opentx/issues/7631

try:
AT+CHAR0xFFF6
in AT mod, this works with my HM-10

go to the file in the SD-card manager. then long press it.