okay so I'm typing this out again, 4 or 5 years ago i was heavily into fpv, I probably spent more than 100hours in simulators bought an enchine or whatever it was called, ( really cheap ) throttle lag and burned all ESC's and replaced one after the other, I was ready to upgrade, bought an HGLRC Sector 5 V3 HD 4S PNP, because it had an air Unit I went with the dji goggles V1, and a TBS Tango 2 which the receiver i put on myself, I was so ready to fly. everything connected went on my first flight, did a little fast pitch or roll and the goggles disconnected for a second and i crashed obviously, tried and tried again. asked around what the issue might be and just couldn't fix it so I quit, I was tired, tired of researching and spending money. Fast Forward to today, I just wanted to get back in again, flashed the drone, upgraded software on goggles and unit connected everything again, in hopes that the issue solved itself.... sadly and i know 4 years is a long time but all my lipos are still good, it's still shitty if not worse, on Liftoff i loose connection to the air unit or it's already distorted from the beginning, (well laggy), and as soon as i try to fly it disconnects, i see the connection go to red, disconnects and then connects again. I'm so close to just buying an avata and selling everything. maybe i am stupid and the antennas are the problem but they come stock on the drone, I just don't understand where the issue is... is it battery spike? If i just connect the googles without flying it i can twist and turn the drone in my hands without any issues but as soon as i try to fly that thing, it basically dies.
#I Quit
3 messages · Page 1 of 1 (latest)
Honestly this sounds much more like a power/brownout issue than a DJI link problem. Since the goggles disconnect only when throttle is applied, the Air Unit is probably losing stable power because of voltage sag or ESC noise.
Most likely causes:
dead/missing low ESR capacitor on the ESC
old LiPos sagging under load
weak/noisy Air Unit power rail
damaged ESC or bad solder joints
I’d first:
Replace/add a 35V 1000uF low ESR capacitor on the XT60 pads
Test with a brand new battery
Check how the Air Unit is powered
Inspect ESC and battery solder joints
The fact that it reconnects after throttle really screams “brownout/reset” behavior. I honestly don’t think the whole setup is dead yet.
I agree with above but also check if the BEC that's running your air unit has the amperage you need. I've had an o4 brown out on my on takeoff for that reason