Search found 2122 matches

by tobias
Wed May 12, 2021 8:33 am
Forum: Developer Discussions
Topic: How to turn the propeller without attitude information from the sensor?
Replies: 6
Views: 129

Re: How to turn the propeller without attitude information from the sensor?

It could be hard to mount the bigquad+cf2.1 perfectly level. A couple of degrees from zero will not cause any problems but it is possible to calibrate this away. In the firmware configuration dialog in the cfclient it is possible to enter Pitch and Roll trim values. Just enter the values the flight ...
by tobias
Tue May 11, 2021 8:03 am
Forum: Developer Discussions
Topic: Bias in accelerometer
Replies: 5
Views: 160

Re: Bias in accelerometer

The controller is out of my knowledge but I know something about the accelerometer though. We do not do any calibration of it other then what is done in the factory and we assume it is sitting pretty flat, which I'm pretty sure is the case. The Alignment error in the data sheet says typical: 0.5 deg...
by tobias
Tue May 11, 2021 7:48 am
Forum: Developer Discussions
Topic: How to turn the propeller without attitude information from the sensor?
Replies: 6
Views: 129

Re: How to turn the propeller without attitude information from the sensor?

If you want them to start at the same time you can set the m1,m2... values first end then enable them.

If you want to see an example you can check the health.c that runs the propeller test.
by tobias
Mon May 03, 2021 7:00 am
Forum: General discussions
Topic: [Solved] Charging and Discharging unprotected batteries.
Replies: 6
Views: 651

Re: [Solved] Charging and Discharging unprotected batteries.

The 4.2v is controlled by the BQ24075 charger and looking in the datasheet the charging voltage can't be changed.
by tobias
Fri Apr 30, 2021 11:44 am
Forum: Developer Discussions
Topic: Filtering on Gyroscope
Replies: 2
Views: 108

Re: Filtering on Gyroscope

There are two level of filters. One in the gyro, BMI088, itself and one 2-pole lpf running in the sensor loop.

For the BMI088 filtering I think the datasheet is the best place to find delay parameters.
by tobias
Fri Apr 30, 2021 8:04 am
Forum: Developer Discussions
Topic: BigQuad used but the drone is very unstable
Replies: 8
Views: 737

Re: BigQuad used but the drone is very unstable

Yes the START_DISARMED probably needs some explanation. It is a safety mechanism and you can decide if you like to use it or not. To arm the motors the parameter system.forceArm needs to be set to 1. This will arm the motors.
by tobias
Fri Apr 30, 2021 8:00 am
Forum: Quadcopters
Topic: Battery Advice
Replies: 1
Views: 77

Re: Battery Advice

Yeah, good question and I don't have any good answer. I little bit swollen I think is OK but yours might be on the edge. In this case probably better save then sorry... I don't think I ever heard of a battery becoming more dangerous because it is swollen though.
by tobias
Fri Apr 23, 2021 8:52 am
Forum: Developer Discussions
Topic: BigQuad used but the drone is very unstable
Replies: 8
Views: 737

Re: BigQuad used but the drone is very unstable

CF_MASS should be in kg so in your case 1.0f. "f" is to tell the compiler it is a floating point number.
by tobias
Wed Apr 21, 2021 9:25 am
Forum: Developer Discussions
Topic: Bolt not applying thrust to one motor, but responsive(?)
Replies: 6
Views: 263

Re: Bolt not applying thrust to one motor, but responsive(?)

Then I suggest measuring the voltage of the M4 signal as I suggested before. I don't know what motor signal protocol you have selected but the default PWM@400Hz should give you a voltage around 1.4V when no throttle is applied. You can also try another protocol like the OneShot125 , maybe this will ...
by tobias
Mon Apr 19, 2021 11:10 am
Forum: Support
Topic: Logging time onto sd card
Replies: 10
Views: 463

Re: Logging time onto sd card

I can help you with part of it at lease. I guess you already read the documentation here ? 1. Start with a standard example just to get going. 2. Check that the sd card is initialized correctly with the console prints in the cfclent. 3. Add your variables and event-triggers All events (groups) are t...