DJI HD FPV mini OSD

I was lacking voltage OSD information on a small RC plane which had no flightcontroller. So I've forked this project to build a mini OSD based on a voltage devider and a small arduino.

Requirements:

• Arduino Pro Micro
• 2 resistors (22K, 4K7)

Features:

• adds cell and total voltage to OSD
• allows to unlock/arming a Caddx Vista or Airunit via high PWM input once

Setup:

• connect VIN and GND to a 5V source
• connect TXD to Vista RX Pad
• connect PIN10 to any Servo Pin, like Rudder
• connect Voltage Divider on A1 to VBAT
  • A1 - [R1 22K] - GND
  • A1 - [R2 4K7] - VBAT

Usage:

• make sure the arduino is powered up with the vbat (if not, the cell detection might get it wrong and display wacky numbers)
• enable custom OSD on DJI
• Voltage should appear
• give high PWM input to unlock the device to full power