RS485 CAN HAT for Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH,Allow Long-Distance Communication via RS485/CAN Function Onboard CAN Controller MCP2515 via SPI Interface Transceiver SN65HVD230

easy to install and setup using the Openplotter OS. worked easily with a Raymarine Axiom 7 chart plotter, allowing me to get GPS to the Pi from the Axiom and AIS from the Pi to the Axiom. great value for money

Helped me reverse engineering proprietary B j1939 pgn's.Step one to making pure freedom from gasoline :)Just use the linux kernel CAN. The library almost immediately made my eyes rot out.

This made getting a CANbus connection to a tool head very easy.

The product works for CAN bus, but the directions provided from the manufacturer are slightly wrong. They set up the Raspberry Pi CAN interface with a clock speed of 8 MHz, but the crystal provided on the board was 12 MHz. With out the correct clock speed the actual baud rates are not produced accurately. When editing the /boot/config.txt file be sure to make the clock value match the crystal (long tin can on one end of the board) match.

This hat was easy to add to the variety of the Pis I have (4B and ZeroW) and it works like a charm. My only complaints are that the male pin headers on the hat get bent easily when compared to a Raspberry Pi's and that the female pin headers can be a pain to mate. The documentation is actually quite good and even provides some ways to debug