Hi. Same problem to power the herelink but also having some problem to power my gopro gimbal. I want to use only one battery to power the whole drone. I am bit confused. Can I power the herelink and gimbal in this way -----> The drone battery will be connected to pixhawk cube orange power bridge mini (input) and the output of power bridge mini to my PDB (power distribution board). The other port of power bridge mini will be connected to pixhawk cube orange power pins to power the pixhawk cube orange. In this way, the pixhawk cube orange and Power distribution board will get power. After that I need to utilize four positive pins and four negative pins to power my 4 drone’s esc as I am making a quadcopter. The left over pins on the power distribution board will be utilized to give power to the herelink system and the gimbal but there the problem will be that the power distribution board will have so much power, so to reduce the power to 12 volt, we can use bec ( battery eliminator circuit) or a voltage regulator to reduce the power. In this way one battery can be used to power the herelink, pixhawk cube orange, gimbal and power distribution board ( the esc ). Am I correct ?
[quote=“Biswajeet, post:13, topic:2691, full:true”]
Hi. Same problem to power the herelink but also having some problem to power my gopro gimbal. I want to use only one battery to power the whole drone. I am bit confused. Can I power the herelink and gimbal in this way -----> The drone battery will be connected to pixhawk cube orange power bridge mini (input) and the output of power bridge mini to my PDB (power distribution board). The other port of power bridge mini will be connected to pixhawk cube orange power pins to power the pixhawk cube orange. In this way, the pixhawk cube orange and Power distribution board will get power. After that I need to utilize four positive pins and four negative pins to power my 4 drone’s esc as I am making a quadcopter. The left over pins on the power distribution board will be utilized to give power to the herelink system and the gimbal but there the problem will be that the power distribution board will have so much power, so to reduce the power to 12 volt, we can use bec ( battery eliminator circuit) or a voltage regulator to reduce the power. In this way one battery can be used to power the herelink, pixhawk cube orange, gimbal and power distribution board ( the esc ). Am I correct ?
Hi. Same problem to power the herelink but also having some problem to power my gopro gimbal. I want to use only one battery to power the whole drone. I am bit confused. Can I power the herelink and gimbal in this way -----> The drone battery will be connected to pixhawk cube orange power bridge mini (input) and the output of power bridge mini to my PDB (power distribution board). The other port of power bridge mini will be connected to pixhawk cube orange power pins to power the pixhawk cube orange. In this way, the pixhawk cube orange and Power distribution board will get power. After that I need to utilize four positive pins and four negative pins to power my 4 drone’s esc as I am making a quadcopter. The left over pins on the power distribution board will be utilized to give power to the herelink system and the gimbal but there the problem will be that the power distribution board will have so much power, so to reduce the power to 12 volt, we can use bec ( battery eliminator circuit) or a voltage regulator to reduce the power. In this way one battery can be used to power the herelink, pixhawk cube orange, gimbal and power distribution board ( the esc ). Am I correct ?
I really didn’t think I’d end up here, geez, okay, I have two herelink systems that I’m working with.
Using a Standard AC/DC Adapter 12v 3.33A power supply on my test bench with Pixhawk cube black, everything works every time I boot it up.
But when attempting to boot the same herelink air module in UAS using a 12v 5A UBEC I only get telemetry, but here is the weird thing, I can re plugin power from the output of the UBEC to the herelink Note: while the UBEC is already powered up, and video comes right up consistently, it’s only when I boot the system as a whole using a 6S 25000 MAH lipo, or Large DC bench power supply.
Things I’ve tried so far:
0 confirm my HDMI source is good.
1 try different HDMI Cable. or a known working one from my test bench.
2 change herelink air module, Does same thing.
3 measure monitor and record voltage power on spikes and monitor current inline. all seems fine when monitoring the current before and after adding a cap on the output of the UBEC I noticed the herelink drawing only 200mah vs the 300 without cap, not sure this is consistent though as only one test was preformed.
4 try using a different voltage 7.4v, 9v, 12v.
5 try using a different UBEC.
6 use Stock antennas without extensions.
7 add a capacitor to the output of the UBEC
8 while system is on, I try and re plug the HDMI connection.
Hope this helps you help me help others
Thanks,
I think one problem is the right timing of the HDMI signal and HereLink startup as well as the communication with the app. I have noticed that the video transmission is not starting reliable if the video source is started to late after the booting of the HereLink or if it is stopped and started again. It might also be a problem of QGC because it eventually starts again after restarting the app.
Are you powering the GoPro from the same battery as the HereLink?
I’m using a small imbedded computer like raspberry pi called a humming board, It does in fact start then moment pause then restart and change its HDMI output resolution at each start, Oh I need to update my last post yes I’ve attempted to restart QGC and the remote controller independently and together with UAS together and are having the same results with no video,
It’s just so weird that the test bench works powering everything as a whole pretty much the same.
I’m going to test powering on the system as a whole again with UAS without HDMI plugged in, then once the HDMI source has fully booted and is set on its output I will plug it in and see.
I am noticing that the LED1 is alternating orange and green when HDMI is plugged in, and solid orange when disconnected, but despite that when it’s plugged in I still don’t get a live feed.
Okay, interesting, the following did not work:
Powered system on as whole without HDMI plugged into the herelink air module, and waited to connect an HDMI source until it was ready 1920x1080p 30fps, plugging in the HDMI source made no change to the solid orange LED1, I even restarted the QGC app but still nothing, while everything was still on I restarted the HDMI source with a negative result, I tried re plugging the HDMI source many times and waited, nothing, I then re plugged power between the here link and the UBEC and it came right up. same as before without having to restart the QGC app. and when it works it’s great stable video and telemetry link, I can move cables around nothing I can see or do to make it fail without taking a hammer to it,
I thank you for your support and effort hextd.
Update: my last test was not exactly accurate, So I’m attempting to recreate the issue on my test bench once again,
So the bootup resolutions are the same they don’t change, the first 1-30 seconds are only showing a logo 1920x1080p 60 fps solid logo, then once the program finally starts it re initializes to live camera view, which is the same 1920x1080p 60 fps my Samsung TV shows Note: if no cameras are connected to the Humming board camera, only the logo will remain on screen. so… my first retest on the bench had cameras where the test I did with the unmanned system had no cameras.
Continuing to test…
So I found that booting the herelink without an HDMI source on test bench waiting to plug in the source to herelink after had waiting some a few seconds time, my source is still in the booting process just before the HDMI restarts cameras initializes, Note: the logo did not show but only source was detected showing only a black screen, but when the live image from the cameras starts it shows the live feed coming from the cameras and it’s working normal. remembering my test with the UAS I didn’t have the cameras connected and was expecting to see a logo, but the difference was it said no input signal detected on the UAS.
Now, knowing this I disconnected the cameras from my test bench, and booted without HDMI source connected to herelink, then when I connected the source expecting a logo I got a black screen, I then unplugged the HDMI from the Humming board and plugged it directly into my Samsung tv and instead of showing the logo it actually made the entire screen turn black as if it was off, but the TV was not off just sort of stuck in a weird state, and! even after I unplugged the HDMI cable from the TV it remained visually as if it was off crazy right? it’s until I press source about five times does it get out of that state.
I do know that I can have everything on my test bench connected prior to powering on and see the logo as normal, with or without cameras connected, If I plug in source late to the herelink when the orange LED1 light comes on with or without cameras connected it shows black screen instead of logo, but once cameras begin steam or when the output restarts it beings working, but this really isn’t an issue as the video is always being detected as normal when plugged in from start.
Is there a difference in the wiring between the flight controller and the computer in both setups? Are you sending data (mavlink messages) from the computer to the flight controller?
Okay so it happens when the Herelink is connected to the cube via telemetry 2 port, but strange because telemetry is working fine when it’s connected, but video does not work, If I unplug telemetry it works every time 
There are many differences but unplugging things one at a time lead me to the telemetry,
the UAS is using CAN GPS here3 and orange cube.
My test bench is using here2 GPS I2C and black cube, I did set the orange cube up along side the black cube, but never thought to test the HDMI part of the herelink as I thought it was independent.
My video steam settings are enabled, just not sure why it works only without telemetry of herelink connected
@philip thoughts?
Okay I figured it out!
It’s a setting called MAV_MODE, it was default set to onboard, instead of normal which when set correctly allows the video stream to work normal.
Great, I think this might be a very useful information for other users!
@Baptiste.K, could that be related to our problem?
Herelink video stops because of companion computer? - HereLink - Cubepilot
Can you explain more? Where is this setting at?
Does MAV_MODE refer to this enum?
https://mavlink.io/en/messages/common.html#MAV_MODE
I see…I was assuming Ardupilot.
Hi and thanks for the heads up !
I was waiting for more information on this MAV_MODE params, but it seems particular to PX4 if i’m not mistaken… Is there an equivalent in arducopter ?
Ok, sorry, I did too.
As far as I understand it this setting defines the set of messages and rates send via mavlink on the specific port (which is the port connected to the computer I guess?).
We need now to look into the differences in messages between the two settings.
Lol… PX4… ah… 
So does this imply that turning the MAVLINK_MODE_1 setting off will fix the hdmi issue?
I would say it is possible that the messages which are send when having activated the mode are connected to at least one of the HDMI issues.