FPV Combat Gadget

DIY device (gadget) that helps you quickly adjust FPV Combat board settings like player ID, player name, lives, ammo and many more.

This is an alternative to classic way of using OSD menu (and IR remote earlier).
It is a convenient way to adjust settings "on the go", at the field, for everyone.

FPV Combat board shall be flashed with compatible firmware.

Gadget version 0.5.0+ requires FPV Combat version 2.8.0+.

Electronic Components

You'll need to buy some electronic components and 3D print the case, see below.
Soldering skills required.

Picture	Item	Comment	Price (per item)
	XIAO-nRF52840 board	With battery charger	$9.90
	HC-12 network module	433Mhz	$12
	0.96inch display	OLED 128 x 64	$2.4 - $3.8
	KY-040 rotary encoder	Breakout	$1.8
	Adafruit TLV62569 (4711)	Step-down converter 3.4~5.5V to 3.3V	$3.95
	Prototype board	30 x 70 mm, or PCB	$0.8
	LiPo Battery	1S, 100-500mAh, 45 x 25 x 9 mm	$11
	Micro Slide Switch	2 positions, 3 contacts	$0.1
Total	$45

Alternatives

MCU
- XIAO-RP2040 - $5.40 (cheaper, no battery charger)
- XIAO-nRF52840 Sense - $15.99 (more expensive, has IMU that we don't use)
Step-down converter
- LM3671 - $4.95
- TPS62827 - $6.95
- DFR0568 - $2.9
Battery charger (optional, use with MCU w/o built-in battery charger)
- Greluma 6st

Assembly

It is possible to order the gadget either fully assembled, as a kit or just PCB from our shop on Etsy.

Alternatively, you can always order PCB yourself from PCBWay, JLCPCB and alike or use 30x70mm prototype board.

Assembly tips

Once soldered, backs of pins/slots have to be filed out/flattened, otherwise risk of damaging the battery;
Straighten encoder pins and cut them a bit, just a several mm;
Cut a bit of encoder pcb, across mounting holes, otherwise it does not fit;
HC-12 is placed white (flat) side up;
Pull HC-12 antenna a little so it is away from everything to minimise interference.