Topics created by John Nomikos 0

@John-Nomikos-0

I found this info about DSP UARTs being available for use with external flight controllers starting in SDK 1.1.

https://docs.modalai.com/voxl2-external-flight-controller/#dsp-uarts-via-apps-proc

So I will try upgrading to SDK 1.1, connecting an external flight controller to DSP UART, and then connecting the gimbal to the UART on top of the 5G hat.

I wonder if it will work if my external FCU is on Ardupilot and I'm using mavlink_router instead of voxl-mavlink-server

@wilkinsaf I completely agree. We can compare to a normal USB camera as well to see if the issue is with specifically streaming from the HDMI to USB capture card

@Eric-Katzfey Makes sense to me. Thank you for the info. Threw me off because journalctl was showing most recent logs were from the future.

@John-Nomikos-0

Thank you. OK, here is the big difference that is most likely the reason for your behavior. In your new params you used kp, ki, max_kpe, max_kpi terms set to zero, but old params have nonzero:

<param name="kp" value="130"/> <!-- RPM controller proportional gain --> <param name="ki" value="30"/> <!-- RPM controller proportional gain --> <param name="max_kpe" value="300"/> <!-- maximum proportional erorr term (max is 999) --> <param name="max_kie" value="100"/> <!-- maximum integral error term (max is 999) --> <param name="max_rpm_delta" value="1200"/> <!-- cap for maximum rpm error used in RPM controller -->

Considering that you have not calibrated the ESC for your motor and propeller (meaning that the feed-forward term in the RPM controller is wrong), if you also disable the feedback terms of the RPM controller (kp, ki) then the behavior of the ESC will be completely off from what is desired. Even with incorrect feed forward term (pwm_vs_rpm_curve terms), if feedback terms are enabled, they can compensate, to some degree, but with the feedback terms set to zero, there is no hope for the ESC to turn the motor at the desired speed.

You can keep using the old firmware and params if that works for you, but if you wanted to switch to latest ESC firmware and params, then i suggest trying to use the same non-zero RPM controller params.

Alex

@John-Nomikos-0 No, you will need to ignore that portion of the data in your code making use of the data.

@Eric-Katzfey I did what you suggested and it works! Thank you again!

@Alex-Kushleyev

Confirmed, changing the MODAL_IO_BAUD to 250000 fixed the problem for me. Thank you so much for the help!

@Vinny Ah I did not know that. Thank you for informing me, I will not put PCBs on ESD bags anymore. I don't want to risk breaking any boards

Also, it turns out that the 2023 model of doodle radio has a separate port for power and USB. So we chose to power the doodle separately instead of daisy chaining one port on the VOXL2 to two ports on the doodle.

@Chad-Sweet You are correct. Swapped the IMX214 for a different one and it worked. Thank you for the help!

@wilkinsaf Thanks for the feedback

JK found it

https://forum.modalai.com/post/4746 (with a link to the quectel AT commands)
https://forum.modalai.com/topic/401/lte-modem-works-but-cannot-ping/23

Had to change my search topic to title AND posts