Implements CAN V2.0B at up to 1 Mb/s
SPI Interface up to 10 MHz
Standard (11 bit) and extended (29 bit) data and remote frames
Two receive buffers with prioritized message storage
Industrial standard 9 pin sub-D connector
Two LED indicators
When you use more than two CAN Bus Shield in one net, you should think about the impedance. You can just cut P1 in the PCB with a knife, or just remove R3 on the PCB.
The pin FREE is available for the other usages.
SPI_CS pin of V1.2 is default to D9. If you want to change it to D10.
Be careful with the box cutter, it’s easy to hurt yourself or the PCBA.
The SPI pins (SCK, MISO, MOSI) is default to the ICSP pins. But for some Boards, maybe the SPI pins is at D11~D13, if so you need to change something in the PCBA. Take a look that the back of the PCBA, there’re three pads, MOSI, MISO and SCK, they are default to A. You can change them to B if needed.
For Arduino UNO, Arduino Mega, Arduino Leonardo and any others AVR based Arduino boards, default is working.
Be careful when you are going to change SPI pins, it’s easy to hear yourself or the PCBA.