#expresslrs

ExpressLRS Squeezes Kilometers Out: Four open-source ELRS receivers, an SX1280 LoRa radio, and one 50-ohm trace: the RF design tricks that keep a 1-watt link locked kilometers out.

DIY 1S FPV Quadcopter: A 1S quad that flies 34 minutes and 5 km, and the copper battery tray that made it possible. The voltage-sag fix works on your robot too.