There aren't very many interesting can pids on the high speed (2-wire) can bus in my Cadillac. For example if I capture frames while using a tech2 to look at tpms data, nothing looks like tpms data. Since the tech2 has both 1 and 2 wire can interfaces I want to start looking at the low speed single wire bus. (Maybe it's just that a "little battery" car first sold in 2008 does things on the low speed bus that newer EVs do on a/the high-speed bus?) My assumption is that the MCP2515 doesn't care about the physical layer as long as the speed is set correctly so my initial thought was to just back a 2-wire transceiver chip up to a single wire one, e.g. the MCP2515 and MC33897. But a friend pointed me at a block post where this guy is using a 2-wire sparcfun shield to snoop a single wire bus: https://blog.mikejmcguire.com/2017/02/20/eavesdropping-on-the-single-wire-ca... He basically just ties can L to ground and can H to the bus. I also found a copy of the can single wire spec (J2411-2000) and it seems 2-wire is 2V differential and single wire is 0-4V so I guess I see how this might possibly work (depending on how the bus i/o pins are designed). Anyway, is it safe for me to do this with one of the SN65HVD233D transceivers used in the ovms V3 module? Craig