DIVIMATH HDZero Freestyle V2 - Help and Troubleshooting; FAQ; Troubleshooting

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Help and Troubleshooting
FAQ
1
Facebook Group and
Discord Server?
www.facebook.com/groups/HDZero
https://discord.gg/JPesSHpmCU
2
Does VRX have low
voltage alarm?
VRX does not have a low voltage alarm. We recommend using an in-line
battery alarm (not included) between the battery and DC cable
3
How does VRX power
cable work?
DC cable has an integrated DC regulator which converts from 3S-6S to fixed
7.8V output. (Manual says 3S-4S)
It is very important to unplug the DC cable from battery after flight.
Otherwise, DC cable will suck up battery power and cause permanent damage
to the battery.
Troubleshooting
1
Video feed is working
but no OSD
(a) VTX/VRX Firmware mismatch: Update both VTX and VRX from the
same firmware release.
(b) Wire connection: TX and RX of FC board should be connected with
RX and TX pads of VTX respectively.
(c) Betaflight setting: Instruction on Page 18.
(d) Try another UART port of FC (avoid to use soft-serial and SA ports).
2
No Blue LED on VTX
Blue LED works as the following way:
(1) Flashing at 1HZ periodically if VTX heat protect.
(2) Flashing at 2HZ periodically if VTX is on pit mode.
(3) Flashing at 4HZ periodically if VTX is on 0mW.
(4) Flashing 4 times if MSP connection is established with FC after VTX
is powered up.
(5) Going off if the camera is not detected.
If a camera is attached, and get NO blue LED, please:
(a) Check if MIPI cable is secured on both end of camera and VTX, and
check if cable itself is fine.
(b) Carefully check VTX MIPI connector if there is any bent pin.
(c) If it is Foxeer Digisight camera, make sure it is NOT on analog
mode.
- Digisight goes to analog when pressing left for 3 sec.
- Use stick commands blindly or disconnect mipi and use external.
joystick.
- Joystick does not work in digital mode. Must use stick commands
(Thr mid, yaw right) to enter cam menu (BF OSD disappears).
3
Snow noise even in
short distance
(a) Add a big capacitor (350+ uF 50V) in parallel to battery leads to
smooth the power supply of the whole aircraft.
(b) Move Radio RX and its antenna away from VTX.
(c) Do not place VTX next to ESC board.
(d) Try another pigtail (if there is).