2022 system

Dragonlink Slim

https://www.getfpv.com/dragonlink-433mhz-v3-advanced-slim-complete-system-w-wifi-bluetooth.html

$336 USD

• Mavlink passthough → can replace an xbee?

• bidirectional

• compatible with current systems → uses PPM, PWM, sbus

• needs external power source

• 433mhz

• typical range 60+km supposedly

  • require testing, but 99% confident range will be at least 3km

• includes receiver

• the most “industry standard”

TBS Crossfire

https://www.getfpv.com/tbs-crossfire-tx-long-range-r-c-link.html

$209 USD

• drops in to transmitter (JR module)

• cheaper

• needs external power source

• limited telemetry

• 900mhz

• no rated distance but should be good for 5+ km

• most popular “hobby-grade” choice

SIYI FM30

~$75 CAD

• straight drop-in

• no external power source needed

• mavlink passthrough

• probably the sketchiest option (least well known)

• 2.4ghz

• rated by manufacturers for 30+km

  • Personally tested to 2km (where it then failesafed) but there was 2.4ghz interference between transmitter and drone

• Have one on-hand, can lend as needed

ExpressLRS

~150CAD

• drops in to transmitter

• cheaper-er

• no telemetry

• external power supply

• can buy for 2.4ghz or 915mhz

• newest product (open source, may require more work to get working)

• supposedly tested for 30+km