Search found 1609 matches

by arnaud
Sat May 05, 2018 4:47 pm
Forum: Loco Positioning System
Topic: Using multiple CFs, unable to get accurate positioning data
Replies: 3
Views: 69

Re: Using multiple CFs, unable to get accurate positioning data

It sounds like you are running the system in two way ranging mode and not in TDoA mode. Two way ranging does not work if more than one drone is switched ON, TDoA works for as many crazyflies as you want. You can find more info about the positioning mode there: https://www.bitcraze.io/loco-pos-system...
by arnaud
Fri May 04, 2018 6:36 am
Forum: Developer discussions
Topic: Asynchronous control of the Crazyflie 2.0
Replies: 2
Views: 74

Re: Asynchronous control of the Crazyflie 2.0

Hi, Crazyflie 2.0 is open source and I see no technical blocker there so yes it is possible. The functionality does not exist in the Crazyflie yet. The way to implement it depends of what your goal is: do you want a one-off very specific solution or do you want something generic that can be used in ...
by arnaud
Thu May 03, 2018 7:09 am
Forum: Developer Discussions
Topic: inquiries about some matrices in the firmware
Replies: 1
Views: 39

Re: inquiries about some matrices in the firmware

Hi,
Have you had a look at the papers linked in the kalman filter? As far as I understand, this filter is an implementation from the referenced paper.
by arnaud
Wed May 02, 2018 8:42 am
Forum: Developer Discussions
Topic: Kalman filter position update requirement
Replies: 3
Views: 79

Re: Kalman filter position update requirement

I am still curious about what was the problem, what did you change to get things to work well?

For the second question I am not sure to understand, maybe you could elaborate a bit.
by arnaud
Wed May 02, 2018 8:23 am
Forum: Loco Positioning System
Topic: LPS Node Config/Crazyflie Config
Replies: 7
Views: 146

Re: LPS Node Config/Crazyflie Config

It looks like your anchor are in TDoA mode (mode LED OFF, RX enable), but there is no anchor with Id 0 powered. TDoA requires at least the anchor with ID 0 to be powered in order to synchronized the anchor system. When you plug the anchor while pressing the DFU button, can you see the anchors appear...
by arnaud
Wed May 02, 2018 8:15 am
Forum: Developer discussions
Topic: Control Commands and Logging in the same python script
Replies: 2
Views: 59

Re: Control Commands and Logging in the same python script

You can setup log block callbacks and control the Crazyflie in a loop, the callbacks will be called when a log packet arrives. An example of that can be found in the autonomous sequence example, if you uncomment the start_position_printing line a log block is created and started, then the crazyflie ...
by arnaud
Mon Apr 30, 2018 12:01 pm
Forum: Bitcraze
Topic: Hello to everyone, and some elementary question of crazyflie.
Replies: 3
Views: 112

Re: Hello to everyone, and some elementary question of crazyflie.

For A.1: You need to use the tool that fits your purpose. If you want to implement some kind of autonomous behavior [python -> firmware] makes sense since you can use python for quick prototyping and then implement autonomous behavior in the Crazyflie directly. If having the computer in the loop is ...
by arnaud
Mon Apr 30, 2018 11:10 am
Forum: Developer Discussions
Topic: state space of Crazyflie 2.0
Replies: 2
Views: 76

Re: state space of Crazyflie 2.0

Hi, I am not sure to understand your question, this looks like the Kalman filter Crazyflie is running, what do you mean by correct? Are you suspecting something is wrong? As a side note, when copy-pasting code you can put it in code-block in the forum this way the code does not take so much space an...
by arnaud
Mon Apr 30, 2018 10:50 am
Forum: Loco Positioning System
Topic: Tdoa Communication Data
Replies: 1
Views: 64

Re: Tdoa Communication Data

These variables are defined in the TDoA implementation of the Crazyflie: https://github.com/bitcraze/crazyflie-firmware/blob/master/src/deck/drivers/src/lpsTdoaTag.c#L419 You can look through the code and add more log variable if you need more information about the state of the system. The TDoA prot...
by arnaud
Mon Apr 30, 2018 10:43 am
Forum: Loco Positioning System
Topic: LPS Node Config/Crazyflie Config
Replies: 7
Views: 146

Re: LPS Node Config/Crazyflie Config

What is the state of the anchors when you power them up, what LED are lit-up or blinking? You should always be able to flash the firmware to the nodes and configure them with USB. To start the anchors in DFU (programming) mode you should press the DFU button while inserting the USB port. Have you ev...