Over Thanksgiving break, I was able to rewrite the firmware with a new library. I ended up using the bcm2835 library after finding out that it still worked on the RPi 4, as it includes both GPIO and SPI functionality.
Vikram and I tested the board with the firmware. After working through some bugs, we are very confident in both the piece detection and legality checking aspects of the project. We also observed that the legality latency is very fast.
I also implemented a function to convert the last played legal move into standard algebraic notation (the most common format of notation). Ryan and I finalized the methods for sending this notation to the website.
After this week, I am back on schedule. I am confident that we will be able to finish integration next week.
