In this fork, the YASDI serial driver has been modified so that the DE / RE signal for RS485 communication is output to a GPIO pin of a Raspberry Pi.
This should enable RS485 communication, using a cheap RS485 module.
This repository is fork of a mirror for the SDK sources provided by SMA found in the sdk directory of this repository to make things more convenient, which is not actively developed.
Clone the repo and run the build_raspi.sh script. All going well, it should grab the dependencies, build the software, and configure the UART port. You will need to specify the GPIO port you wish to use for the DE / RE signal. GPIO18 is located conveniently below the UART pins.
sudo ./build_raspi.sh 18
Tested working on RaspiOS Bullseye, on a Pi Zero 1.3.