Search found 10 matches

by ranjeetkumar
Fri Mar 29, 2019 11:00 am
Forum: Autonomous flight
Topic: Autonomous flight without using any external position system
Replies: 5
Views: 663

Re: Autonomous flight without using any external position system

As far as orientatoin is conerned, internal controller of the crazyflie is being used, i am just giving 'twist.angular.x' and 'twist.angular.y' as ''0". Controller is taking care of making the orientation "0". but, I am not using the internal position controller, i have written pid controller to con...
by ranjeetkumar
Fri Mar 29, 2019 9:51 am
Forum: Autonomous flight
Topic: Autonomous flight without using any external position system
Replies: 5
Views: 663

Re: Autonomous flight without using any external position system

From your description it seems that you do not have a controller problem but more likely a sensor/estimation problem. The existing PID controller in the Crazyflie ca do a decent job at keeping a heigh setpoint giving good quality height estimate, this can be seen when using the z-ranger or flow dec...
by ranjeetkumar
Thu Mar 28, 2019 11:15 am
Forum: Autonomous flight
Topic: Autonomous flight without using any external position system
Replies: 5
Views: 663

Autonomous flight without using any external position system

Hi all, I gone through sensor filtering and study of the data and now i could get position of the crazyflie 2.0 without using any external positioning system. I am using pressure, acceleration (in vertical direction), as a feedback i see average error of 20cm. I am using averaging filter to filter p...
by ranjeetkumar
Mon Mar 25, 2019 11:24 am
Forum: General discussions
Topic: Crazyflie Research package for sale
Replies: 2
Views: 395

Re: Crazyflie Research package for sale

This is a repost - I didn’t have notifications turned on so I missed a lot of PMs. We purchased the following drones and accessories directly from Bitcraze in May 2018 for a research proof of concept project. We have pivoted our business model and no longer need them. We barely used the drones (a f...
by ranjeetkumar
Mon Mar 25, 2019 7:51 am
Forum: Bitcraze
Topic: Pressure sensor on crazyflie 2.0
Replies: 8
Views: 812

Re: Pressure sensor on crazyflie 2.0

You can use the Crazyflie client to look at the log toc, in the client you can click on "view/tabs/Log TOC". The pressure is available in the variable "baro.pressure". Thank you for you useful reply, i used the baro.pressure and it worked in logging the variable. One thing I would like to mention t...
by ranjeetkumar
Wed Mar 20, 2019 12:06 pm
Forum: General discussions
Topic: Synchronize Multiple Log Blocks
Replies: 5
Views: 1052

Re: Synchronize Multiple Log Blocks

Hi, I noticed the size of single log block is limited to 28 bytes, which can only contain about 4-6 float variables. Well, in my application, I have to log about 20 variables at the same time. I tried to split them into 5-6 groups and build corresponding log blocks. I used the interface to write th...
by ranjeetkumar
Wed Mar 20, 2019 11:40 am
Forum: Bitcraze
Topic: Pressure sensor on crazyflie 2.0
Replies: 8
Views: 812

Re: Pressure sensor on crazyflie 2.0

The ROS Crazyflie driver has a way to setup log blocks in the launch file, see existing lauch files for example of how this is achieve: https://github.com/whoenig/crazyflie_ros/blob/master/crazyflie_demo/launch/hover.launch#L16-L20. The log will be published as a ros topic. Since, i wanted to get t...
by ranjeetkumar
Wed Mar 20, 2019 5:04 am
Forum: Bitcraze
Topic: Pressure sensor on crazyflie 2.0
Replies: 8
Views: 812

Re: Pressure sensor on crazyflie 2.0

Hi, You can use the log subsystem to acquire the pressure sensor value at any rate up to 100Hz. If you are using the client you can setup a new log block in "settings/logging configuration" and if you are using the python lib there is a couple of example in the example folder showing how to use the...
by ranjeetkumar
Wed Mar 20, 2019 4:41 am
Forum: Bitcraze
Topic: Pressure sensor on crazyflie 2.0
Replies: 8
Views: 812

Re: Pressure sensor on crazyflie 2.0

Thank you very much for providing the information, can you tell me how to achieve the same if I am using ROS with crazyflie?
by ranjeetkumar
Mon Mar 18, 2019 6:56 am
Forum: Bitcraze
Topic: Pressure sensor on crazyflie 2.0
Replies: 8
Views: 812

Pressure sensor on crazyflie 2.0

Crazyflie published pressure sensor data at 10 Hz, as far as the hardware used as barometer (LPS25H) can publish data to a maximum frequency of 25 Hz, how to increase the frequency of publishing? Is it possible, if yes then how and what can be the maximum limit of publishing? :roll: