Search found 59 matches

by poizone
Mon Mar 16, 2015 5:51 am
Forum: General discussions
Topic: Water-"proofing" the crazyflie
Replies: 10
Views: 6934

Re: Water-"proofing" the crazyflie

Water contact and LiPo is a dangerous game and submerging the antenna will always cause you to drop signal no matter what. Water is pretty much opaque for our radios. I'd suggest a shell that clamps together with a rubber seal between the halves for anyone looking to go near anything wetter than a d...
by poizone
Tue Mar 10, 2015 3:47 am
Forum: Developer Discussions
Topic: Problems with Alititude Hold Program
Replies: 5
Views: 4152

Re: Problems with Alititude Hold Program

You're going to need to delve into the code and roll your own solution for what you want. You have to continually send the hold command because it has a failsafe against radio loss from what I've seen. A simple loop that calls the altitude hold function should work for you.
by poizone
Mon Mar 09, 2015 7:32 pm
Forum: Developer Discussions
Topic: Problems with Alititude Hold Program
Replies: 5
Views: 4152

Re: Problems with Alititude Hold Program

Altitude hold uses the barometer currently. Autoland would use a linear decrease in the barometer altitude setpoint until decreasing thrust is forced to 0 without altitude changing. Happy coding!
by poizone
Mon Mar 09, 2015 7:28 pm
Forum: General discussions
Topic: Get linear velocities from accelerometers
Replies: 8
Views: 6011

Re: Get linear velocities from accelerometers

We aren't calling you stupid, just trying to get to the root of your problem. I didn't understand how acceleration, velocity, and position related to each other mathematically for a very long time. Those basic equations are all sorts of useful when it comes to quads, but our codebase isn't as mature...
by poizone
Sun Mar 08, 2015 12:15 am
Forum: Support
Topic: [SOLVED] CF 2.0 not restarting in firmware mode
Replies: 28
Views: 25744

Re: CF 2.0 not restarting in firmware mode after flashing

Are you using the proper toolchain? The CF1 requires a 4.7 arm-none-eabi toolchain while the CF2 was moved to 4.9 from what I can tell. They aren't interchangable based on my testing, even if it builds properly.
by poizone
Sun Mar 08, 2015 12:09 am
Forum: Support
Topic: roll pitch yaw calibration
Replies: 13
Views: 11163

Re: roll pitch yaw calibration

Propeller guards do what they say and no more, guard the props. This seems to be a solder issue with the IMU, and crashes and bumps seem to be the common factor. I'm going to let one of the BitCraze guys take it from here, because this seems to come down to how well the chips are soldered on. The du...
by poizone
Sat Mar 07, 2015 7:28 am
Forum: Developer Discussions
Topic: CLOAD details
Replies: 5
Views: 3528

Re: CLOAD details

Ok, I'm finding the relevant bits now. If I'm not mistaken, our .ld is misnamed, mentioning only 32K flash. I believe it's flashing for 128K. I've opened up the matching .ld in cleanflight and found this for memory defs: /* Specify the memory areas. Flash is limited for last 2K for configuration sto...
by poizone
Sat Mar 07, 2015 5:39 am
Forum: General discussions
Topic: Get linear velocities from accelerometers
Replies: 8
Views: 6011

Re: Get linear velocities from accelerometers

Hi poisone, I think it's a little bit more tricky, accelerometers measure some specific acceleration that includes the gravitational acceleration. It seems for me that we have to manipulate the measures from the accelerometer along with the readings of the angular rates to get the acceleration. In ...
by poizone
Sat Mar 07, 2015 5:26 am
Forum: Support
Topic: roll pitch yaw calibration
Replies: 13
Views: 11163

Re: roll pitch yaw calibration

This looks similar to a few crazy values people have been posting that end up being IMU issues. Have you crashed much since you got it? Also, is there any drift other than yaw drift? I also have to wonder if the IMU is getting a bit hot and causing the errors and loss of alignment. Perhaps they need...
by poizone
Sat Mar 07, 2015 3:12 am
Forum: General discussions
Topic: Crazyflie 2.0 stunt video
Replies: 11
Views: 7869

Re: Crazyflie 2.0 stunt video

Now learn them vertically instead of horizontally. I'm excited to learn some acrobatics with mine like this.