I am unabel to get the main battery voltage reading to show on the OSD in the goggles.  Vertical and Horizontal horizons are working; has anyone seen this?  All stick movements are properly recognized by quad.

Ocusync Air Unit - V01.00.0700
Goggles RE - V01.00.0700
Betaflight - 10.4.1
Firmware - BTFL 3.5.2 (Target: REVO)
On an F4 FC - https://www.getfpv.com/f4-advanced-flight-controller.html

Wiring (from air unit)
Red : +PDB
Black : -PDB
Brown : GND (see below for FC board)
Yellow : SBUS/RX1
White : TX3
Grazy : RX3

Setup:
Ports - USB VCP On, 115200
UART3 On, 115200, SmartPort Auto

Configuration:
TELEMETRY, OSD both on

Any suggestions are welcomed; any other questions I will gladly provide more information.

Thank you in advance,
John

Solution : in "Power and Battery" set the voltage meter source to "Onboard ADC".  Cell count and voltage are incorrect, that's up next

My drone was already set to "Onboard ADC". What else should i try?

I have been messing with this for a couple of days now. Watched a couple of youtube videos and still no luck. Could using the wrong Uart on the flight controller cause this?

AEFPV Posted at 6-29 15:27
I have been messing with this for a couple of days now. Watched a couple of youtube videos and still no luck. Could using the wrong Uart on the flight controller cause this?

I am using a Aikon F4 Flight Board.

Here's the link to my board:
https://www.getfpv.com/aikon-f4-flight-controller-bf-w-osd.html?utm_source=google&utm_medium=cpc&adpos=&scid=scplp8810&sc_intid=8810&gclid=CjwKCAjwi_b3BRAGEiwAemPNU6PsPW6i_V3_m4e_EczQ_XiiwJQscO98Ooh87446JiGx6HEGOx7sIxoCGUAQAvD_BwE

The reading of my battery shows N/A anybody knows how to fix it?