Download the latest Dartstracker image version 1.0.8880.32583 released 24-04-2024  for the Gen 2 version of the dartstracker based on the OV9732 camera modules here. This image is tested on the RPI-4B 1GB and 4GB 
IMPORTANT : There was an issue with the former 1.0.8878.31444 image of 22-04-2024, please download the latest image again if you've downloaded it before 23-04-2024.

For the former Gen 1 version of the dartstracker based on the OV9726 camera modules download this image.

Instructions
Unzip the dartstracker .img file from the downloaded zip and use a program like Etcher or Win32DiskImager to write the image to the SD-Card. Then put the SD-Card into the Raspberry PI and start it. Use the Dartstrainer app (Settings => Gungnir Dartstracker => Network) to put it on Wifi, or if that fails get the LAN IP address of the RPI from the router. After connecting to the network, start a browser and connect to the admin-site (http://<ip-address>). 

The Gungnir Dartstrainer is the scorekeeping app for the Gungnir Dartstracker that connects to the dartstracker via bluetooth to play all kinds of dartsgames. 
Check the Dartstrainer Feature page for available downloads.