Bitcraze Forums

Ah. I misunderstood how the positioning system works, my understanding was that the LPS sends a position setpoint to the Crazyflie and then the Crazyflie uses TWR/TDoA to position itself to the setpoint, hence why I observed a difference in the flashing LEDs. This explains a lot, my system seemed to...

Hi Arnaud, I'm running swarmSequence.py so that should be TDoA unless I've misunderstood something. I have very limited access to the lab now (my project is almost completed) so I will have to check the LEDs but my videos albeit low resolution suggest that the TX LED is flashing on the deck that is ...

Yes that is correct, LED's flash at start-up and disconnect after 10/15 seconds until just one Crazyflie LPS deck remains flashing. All CF's are using the latest firmware (I re-updated them prior to the latest test to check). I do not believe it is a connection problem as the deck that remains flash...

Hi Arnaud, Sorry for the delay, I had/havce limited access to the lab. All copters are using the latest firmware and I have the latest version of the lib, the take-off is fairly smooth now. When flying four CF's, each with an LPS and flow deck installed, only one of them seems to be in it's set posi...

Hi, sorry for the delay in reply, I am using the latest firmware, I have tested 2 CF's extensively using swarmSequence.py and seem to have hit a good success rate (~75%) by: - Resetting the power to the LPS prior to each test - Restarting each CF prior to each test - Resetting the radio prior to eac...

I agree that the CF's do not have a position update from the system. I managed to run autonomousSequence.py after restarting and reconfiguring (setting the coordinates) of the LPS in the Windows client. I do notice however the TX light flashing during flight, my understanding is that this means the ...

I have tried 2 CF's facing X and this had a slightly better success rate, but still on more than half of test flights one (usually the second) would either stay stationary or fly sidewards and crash into our cage. I have also tried with 3 CF's twice: Test 1 - CF 1 took off, hovered and landed where ...

My coordinate system is right-handed, it's just rotated 90deg relative to the one you provided - in swarmSequence.py, you have a diagram of the nodes and starting positions at the start of the code, these don't match my orientation. I have altered them to match my lab setup and this did initially yi...

Thanks Arnaud, 1) This fix worked, flying 2 CF's with swarmSequence.py worked, however I couldn't seem to replicate the results, the behaviour was very odd. I managed to get 2 to take-off, hover for a second and then land perfectly but on a second run one of the CF's fly totally off-course and crash...

I have 2 new questions: 1) RE trying to fly multiple CFs together using LPS. I am getting an error when trying to run swarmSequence.py 'cannot import name 'CachedCfFactory' '. I have found CachedCfFactory in 'swarm.py'. Can't seem to find a mention of this module anywhere on these forums? 2) Running...