The RemoteTx ham radio remote control software is easy to set up. The first step is to create a micro sdcard with the RemoteTx Raspberry Pi software on it. This is done by downloading the RTX-04 image file below and then using the Etcher software program to copy the image to a 8Gb or larger micro sdcard.
RTX-04 – RemoteTx micro sdcard image for Raspberry Pi 3B / 3B+ /4B
RTX-04 – Alternate download site
Etcher.io – Etcher micro sdcard imaging software for Mac and Windows.