Quantity   Component name
2 × JH-D400X-R4 Joystick https://www.ebay.com/itm/4-axis-Joystick-Potentiometer-Button-Controller-Fit-For-JH-D400X-R4-10K-4D-Wire/152653379606?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
1 × SAMD21 Breakout Board https://www.tindie.com/products/AP_tech/samd21-breakout-board/
1 × DC-DC Step-Down Buck Converter https://www.ebay.com/itm/3-40V-DC-DC-Step-Down-Buck-Converter-Inverter-Power-Module-Voltage-Regulator-/272685424222?hash=item3f7d515e5e
1 × XBee pro https://eu.mouser.com/ProductDetail/digi-international/xbp24cauit-001/?qs=%2fPVulymFwT1oQlHUwvmBKA%3d%3d&countrycode=US¤cycode=USD