Herelink Air Unit not Pairing with Ground Unit

[Maxim (Roger Pecina)]

Hey,

So I was trying to pair my air unit to my ground unit for the first time.
I was running 5.22V (checked voltage with multimeter) from the Airbot Cube Carrier Board/PDB (https://www.airbot-systems.com/wp-content/uploads/2019/07/AS-Mini-Carrier-board-Pinout-v1.2.pdf) RC_IN using a servo wire that I split into a positive and ground lead going into the 5-12V Power port while the signal and ground went into the S.bus port… I’m not sure if this caused a short or something by using a common ground…

The LED1 or LED2 lit up briefly while I tried to pair the Ground and Air Unit then nothing. I tried updating the firmware for both the ground and air unit but the air unit is unresponsive and I’m beginning to fear the worse. It was such a low voltage and it didn’t even feed into the S.bus port if you take a look at the connector I made.

Any help or suggestions would be appreciated.

-Roger

[philip]

RCIN is designed for very basic RC Receivers not companion computers like HereLink.
Please give it its own dedicated supply

[philip]

I’ve added a new service bulletin in response to this

SB_0000004Limited power capacity of the RCIN power rail on Pixhawk Autopilots

This bulletin applies to ALL Pixhawk and Pixhawk related hardware including all genuine boards (3DR and CubePilot) as well as all clones and derivatives. DO NOT POWER anything off the RCIN power pin other than a traditional RC Receiver, and do not connect any servos to the RCIN pin, nor to the Receiver itself. Companion Computers like HereLink, Raspberry Pi, Nvidia Jetson etc (and any others) should not be powered from this pin. They should be powered separately from the Autopilot. Failure to…

[Maxim (Roger Pecina)]

So you don’t think I damaged the Air Unit by doing this? Based on this connector I made.
I’ve tried powering on the unit via micro usb and it has been unresponsive. Thoughts?

[philip]

I can’t see how, but try it on external power.
The ideal power source is a 2S battery

[ross99502 (Adam Kayser)]

Hello,

I have a new Herelink that I am trying to pair the Remote with the Air Unit. Every time I put the remote and air unit into pairing mode I get a " Negotiation timed out, try again" message on the remote.

1. The air unit is powered by a 3S battery and only had the antennas connected.
2. Both the remote and the air unit have been updated according to the Herelink User Guide.

I could use some input. Most of my searches have been fruitless so far for a solution.

Thanks,
Adam

[Alvin]

Please open a new topic rather than raising your problem on other’s discussion

For your case, please try to reflash both controller unit and air unit with flasher again.

[ross99502 (Adam Kayser)]

Can do thank you. I have tried to reflash with no success. I will open a new topic and put the details of that in there as well.

[Tom_Lautenbach]

Hi did you come right with this, I am also haveing the same issue, and have rebooted and loaded firmware. still nothing. please help

[FIT_RS (Ian Fairweather)]

Me too…brand new units will not pair.