see the video
credits:
Bazooka Antenna: http://muck-solutions.com/?p=1324
Raspberry pi: https://www.amazon.de/Raspberry-1373331-Pi-Modell-Mainboard/dp/B07BDR5PDW/ref=sr_1_3?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=3ARR7T8X5MSVU&keywords=raspberry+pi+3+b%2B&qid=1554751837&s=gateway&sprefix=raspberry%2Caps%2C194&sr=8-3
power supply: USB from 12v 5A https://www.amazon.de/Ben-gi-Stromversorgung-Converter-einstellbar-Step-down-Brett/dp/B07PKVBWC8/ref=sr_1_21?__mk_de_DE=%C3%85M%C3%85%C5%BD%C3%95%C3%91&keywords=usb+power+supply+5a&qid=1554751950&s=gateway&sr=8-21
Openplotter Software: http://sailoog.com/
the Moitessier HAT from Sailoog:https://shop.sailoog.com/openplotter/4-moitessier-hat.html
180.- Euros approx.