the tranceivers are simply isolated and powered from bus side. So if there is no power on bus, tranceivers are not on.
Hi guys so I finally got a Mega 2560 and a MCP2515 & MCP2551 combo board. I cannot seem to get it to work with my Garmin GPSMAP742xs. I tried temperature monitor and looking in the NMEA2000 device list on GPSMAP unit. I also tried Actisense and don't pick up anything.I have the libraries set up as per the instructions on Github. I do have both the MCP and Due libraries but I don't think that will make a difference. I then also add the line #define USE_MCP_CAN_CLOCK_SET 8 because my MCP board has a 8mhz crystal.I am adding a rough connection diagram of how I got it wired.Any help appreciated.