In the middle are options like this, which handle the CAN interface and are controlled via SPI (such as from an Arduino or Raspberry Pi).

An Arduino can interface with them but the code is a bit tricky and to get a webpage of it starts costing alot. You can get a standalone server here but I have no idea how well they work.

While a Raspberry Pi is a full-fledged computer that can do more complex things than an Arduino microcontroller, it's not the best choice for every project.

The “N” in CAN stands for network, after all. The trick is to create a device ID for each desired CANSerial interface, which is done in his library using the usual Arduino setup step.

But what if you could combine the two systems for your project-building needs? So, here are five cool ideas you can bring to life by combining your Arduino microcontroller with a Raspberry Pi SBC.

It’s a small PCB with an onboard CAN interface from an ESP32-S3 and a car-friendly power supply circuit, and perhaps most importantly, it has an auto-shutdown feature to prevent battery drain.