VOXL m500 Reference Drone

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  Occasional instability and crashes (possible positioning error)
  • Umut John  

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  Still need some troubleshooting on the logs I've posted if anyone in the team have some time. Cheers to all!
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  Resetting ssh password
  • Dean Hart  

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  Seems to be an issue with QGC itself. The latest v4.2.3 I’m running is where it’s failing. If I revert back to the latest 4.1.* (4.1.7) it works.
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  m500 Motor Hot and Vibration
  • yu zhang  

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  @Adrian-Hidalgo All right, thanks. I will check them step by step, and hope it will be solved soon
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  Auto-Exposure Issue with Tracking Camera
  • Michael Hinckley  

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  Hi Alex, We were using: voxl-send-command tracking set_exp_gain <exposure> <gain> However, it seems that we were not setting the auto exposure mode to "off" before sending the commands.
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  How to unplug the MCBL-00007?
  • DarkKnightCH  

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  @DarkKnightCH Use a flat tipped screwdriver or similar device to slowly pry it out. Take your time working both sides of the the Hirose connector. Take care as the pins can get bent if too much force is applied
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  PX4 disconnected from UART & QGC cannot connected to modalAI
  • DarkKnightCH  

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  @Chad-Sweet Yeah. I tried the following command voxl-configure-opkg and opkg update and then try to restart the voxl-vision-px4 and it seems nothing helps. Since I can connect to voxl through wifi and adb, I have no idea why voxl will broken since I treat it very carefully. Indeed sometimes this QGC disconnection issue happens randomly. Could I mail back the Flight Core and VOXL to you and would you mind helping me check what is the issue?
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  voxl-camera-server.conf tracking camera settings not applying
  • jonathankampia  

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  Hi Jonathan, The underlying pipelines for the CV sensors are all delicately built and only support very specific resolutions. I'll update our documentation to better reflect this, but in general: The stereo pipeline can only do 30hz(for now, we're working on this) since it's very custom and the tracking camera can do 30,60,90, and 120hz. The hires camera is more standard and has more robust pipelines implemented to support more standard video stream configurations. As for the manual exposure/gain, have you set the auto exposure mode to "off", if not you're just setting up the starting point for the camera and the AE library will still perform it's usual duties. If you're still having issues after this let me know and we can dig through more of what you're seeing.
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  How to integrate the external vision(Mocap) pose into M500 correctly?
  • DarkKnightCH  

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  I think you'll need to create a new service that behaves like voxl-qvio-server ? That might be the easiest if you want to drop it. Maybe try copying qvio-server and modifying to publish mocap data?
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  Landing gears for VOXL m500
  • Ashish Chittimilla  

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  That was actually a very good question. Any recommendations?
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  Pre-arm check failed
  • yu zhang  

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  @modaltb I see. It's good to know the story If 22027 is the default one, it will be all right. To be honest, I didn't touch the CBRK_IO_SAFETY before, and it's a bit weird why it was automatically modified for some reason. Actually, I was trying to refresh a re-compiled 1.11.3-0.2.3 with my modification (increasing GPS log rate). So, I guess it might reset the value to 0 by PX4 default. Anyways, thanks so much!
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  This topic is deleted!
  • 張為超  

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  Question about voxl-dfs-server.conf and voxl-tflite-server.conf
  • yu zhang  

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  @Alex-Gardner All right, thanks so much for that
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  GPS sampling rate is limited
  • yu zhang  

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  @stevet All right, thanks so much for that, and I will have a try about it then
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  The angle of the tracking camera mount on m500
  • yu zhang  

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  @Alex-Gardner All right, thanks so much for double-checking
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  Limted flight speed in mission and position modes
  • yu zhang  

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  Hi @Chad-Sweet thanks for that, and it seems it could work by setting a higher value of the maximum speed in QGC. I will test it again to see if it could work to achieve a fast speed in the mission mode
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  VOXL streaming has at least 2-3s delay for default 640x480 using hires
  • yu zhang  

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  Hi @張為超 All right, thanks so much for that, and I will then have a look at it
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  Controlling a servo with VOXL
  • vmassague  

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  Yes, chr is an issue most likely. Take a look at how uint8 from a binary representation is sent here : https://gitlab.com/voxl-public/voxl-sdk/core-libs/libapq8096-io/-/blob/master/lib/python/voxl_i2c_apm_v1.py#L48 you can do something similar (also example for hex). The data type needs to be some sort of an int. #values of configuration registers CTRLA (address 0x00) and CTRLB (address 0x01) CTRLA = np.uint8(int('0b01011000',2)) #offset calib every 128 conv, volt=Sense+; so sampling takes about 35ms (for both voltage and current together) CTRLB = np.uint8(int('0b00000100',2)) #addresses of registers for reading data REG_VRAW = int('0x1E',16) REG_IRAW = int('0x14',16) #write configuration to both LTC2946 devices p.slave_config(ID0) p.write(0,8,CTRLA) p.write(1,8,CTRLB) ... p.slave_config(ID0) vraw_batt = p.read(REG_VRAW,8,2) iraw_batt = p.read(REG_IRAW,8,2)
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  How to use voxl-logger to sample hires camera?
  • Matthew Howlett  

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  +1 for this functionality if possible. Would it be possible to merge the color branch into dev/master for the next release? If speed is a problem I think it would be acceptable to limit this to lower resolutions as a starting point
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  m500 enabling RTK GPS
  • yu zhang  

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  @Eric-Katzfey Thanks so much for double-checking! The used RTK is F9P (u-blox F9) based, so I think the Holybro one should also work for PX4 unit. I will double-check with the team in Holybro if everything is good for the replacement then.
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  Radio frequency regulatory information of m500
  m500 wifi documentation frequency japan • • garcia-g  

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