Search found 8 matches

by john5648
Fri Jul 30, 2021 9:59 am
Forum: Loco Positioning System
Topic: How can i get the position of the tag ?
Replies: 2
Views: 9521

Re: How can i get the position of the tag ?

Hi You can find position of crazyflie from example code https://github.com/bitcraze/crazyflie-lib-python/blob/fbc491c811127785d3318e0ec45e264c055c1ca3/examples/autonomousSequence.py line 110 is the function that saves position of crazyflie to variable x, y, and z. position of crazyflie is coming fro...
by john5648
Fri Jan 22, 2021 9:34 am
Forum: Loco Positioning System
Topic: [SOLVED]TDOA2 positioning error in high altitude
Replies: 3
Views: 9838

Re: TDOA2 positioning error in high altitude

Hi kristoffer Thanks for the reply Yes i am using flow deck v2. I also checked the ranging std of flow deck and as you can see below flow deck has really good performance. flow deck std.png This is the picture of how i settled anchors configuration of anchor.png below anchors has height of 0.7m~1.19...
by john5648
Fri Jan 22, 2021 7:30 am
Forum: Loco Positioning System
Topic: [SOLVED]TDOA2 positioning error in high altitude
Replies: 3
Views: 9838

[SOLVED]TDOA2 positioning error in high altitude

Hi i have problem with drone being unstable in high altitude(1.5m and 2m). In video i send certain coordinate point using send_position_setpoint command to make it hover. (https://youtu.be/3zIm3GidDUo) I installed LPS using 8 anchors with 8m x 8m space, and anchor height being 0.7m and 2m. I guessed...
by john5648
Thu Jan 07, 2021 5:27 am
Forum: Loco Positioning System
Topic: LPS Node as Tag and Anchor
Replies: 12
Views: 6472

Re: LPS Node as Tag and Anchor

hi i'm trying to do 4 flying drones localize their position with TDOA2, then switches to anchor and ranges 1 drone on ground using TWR, and repeat these steps. TWR algorithm is inter-drone ranging code and i used this source https://github.com/bitcraze/crazyflie-firmware/pull/580 . i made mode switc...
by john5648
Mon Dec 28, 2020 1:14 pm
Forum: Loco Positioning System
Topic: ranging between crazyflies
Replies: 3
Views: 1565

Re: ranging between crazyflies

Hi, Mathilda Thanks for sharing the code. I have read your reply the day you posted but I was already using inter-drone twr ranging code of this: https://github.com/bitcraze/crazyflie-firmware/pull/580 What i'm trying to do is opposite as yours, making drone working as tag and anchor. Also, using TD...
by john5648
Sat Dec 12, 2020 4:33 am
Forum: Bitcraze
Topic: AntenaDelay
Replies: 11
Views: 6218

Re: AntenaDelay

Hi
thanks for the reply

I changed ANTENNNA_OFFSET to 155.5 and it worked
ranging error dropped to 10cm below

For people who wants to change ANTENNA_OFFSET,
increase ANTENNA_OFFSET to decrease ranging distance, and
decrease ANTENNA_OFFSET to increase ranging distance
by john5648
Tue Dec 08, 2020 9:16 am
Forum: Bitcraze
Topic: AntenaDelay
Replies: 11
Views: 6218

Re: AntenaDelay

Hi I just tested a TWR ranging accuracy between one node and one crazyflie. The ranging data was from LoPoTab0 - ranging.distance0. untitled.png The data showed ranging error of over 300mm. Is this also a problem of antenna delay? If it is, is there some kind of criterion which value should I fit in...
by john5648
Mon Nov 30, 2020 9:27 am
Forum: Loco Positioning System
Topic: ranging between crazyflies
Replies: 3
Views: 1565

ranging between crazyflies

hello i want crazyflie to range other crazyflie using TWR. I found TWR code in crazyfile-firmware https://github.com/bitcraze/crazyflie-firmware/blob/8c925aa7abd79ac05ef7d94b98bfacd4e37441fd/src/deck/drivers/src/lpsTwrTag.c but still i have no idea how to start It would be appreciated if somebody co...