Address configure error

[whoenig]

1. Crash: When does this happen? Does the log file it points you to contain any additional information?
2. Low-Signal when using multiple radios: I assume each radio is using a different channel? If you use the 2Mbit operation mode, the channels need to be spaced apart by at least 2 MHz.
3. Oscillations: Did you program unique device addresses for each Crazyflie? Did you disable logging (that reduces the radio bandwidth)?

The USB hub should not be a problem in general. It adds some latency, but the bandwidth stays the same.

[ryanwallis]

1. I will be away from the lab for a few weeks so I will update when I can check the log file. The crash was every run.
2. Yes each radio is using different channels, I have also tried different data-rates
3. Yes unique address for each, and yes logging has been disabled
Okay, I see

[Newk]

I'm running into the same issue when calling:

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roslaunch bitcraze_lps_estimator dwm_loc_ekf_multi_hover.launch

Not being able to change the URI adress with the same channel and bandwidth.

Setting the launchfile like this will not work:

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<?xml version="1.0"?>
<launch>
  <arg name="uri0" default="radio://0/1/2M/E7E7E7E7E7"/
  <arg name="uri1" default="radio://0/1/2M/E7E7E7E701"/>

only different channels with the same default URI address (0xE7E7E7E7E7)

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<?xml version="1.0"?>
<launch>
  <arg name="uri0" default="radio://0/1/2M"/
  <arg name="uri1" default="radio://0/124/2M"/>

When changing radio-channels like this tracking becomes more jittery

Can the fix with VICON be applied with LPS aswell?

[whoenig]

Hi,

You can try changing line https://github.com/whoenig/crazyflie_ro ... ie.cpp#L47 from

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success = std::sscanf(link_uri.c_str(), "radio://%d/%d/%d%c/%lx",

to

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success = std::sscanf(link_uri.c_str(), "radio://%d/%d/%d%c/%llx",

and report back here. Which operating system are you using - 32 or 64bit?

As for your channels: not every channel allows good communication. You will need to find channels which do not interfere with other devices using the same 2.4 Ghz band (such as Wifi, bluetooth etc.).

Wolfgang

[Newk]

That did work!
Thank you! I now got it to detect and control 3 drones with LPS on the same channel.. Awesome!

i'm on (L)ubuntu 16.04 32bit

Tomorrow i set up the anchors properly and try to get them flying as stable possible...
I am totally new to ROS and need to figure out what part of code is communicating with other parts.