Parameter screen casts floats as ints

QGroundControl
1

A large number of parameters, including cal coefficients, show on QGC as rounded to nearest integer. If I save params to a file, or do param show PARAM in a Mavlink console, I see the full floating point values. Any suggestions on why this would be?

I’m running PX4 1.12 and QGC 4.2.8 on Ubuntu20.

2

Have you checked whether this has been fixed in the latest QGC version? Oh nevermind, that’s what you’re using.

3

Have you tried with a newer version of PX4? I wonder if it’s due to the parameter meta data coming from the flight controller.

4

Yes, I’ve tried the latest stable PX4 and the same behavior is happening. I also cleared the folders under ~/.cache and ~/.config but no change. Thank you for the help.

5

Not sure if that’s it, but I noticed that after I add my own parameters such as in snippet below, then QGround shows param as integer, but logging param value from module still shows floating point exact value.

/**
 * My coefficient
 * @group My Group
 */
PARAM_DEFINE_FLOAT(P00, 0.001);

However if I add * @decimal 7 to description of param, then QGC shows param properly and can be changed to floating point without issues. Note that you may not need 7 decimal places and can specify custom value.

Worth to mention, I work on PX4 version: 1.14.0 0 (17694720) and QGC daily, master: 2023-01-11.