Jarkko Sonninen

Try looking kernel messages and use ioreg-command.

Try also ioreg -l and try to find the device to see what driver it is using instead. If you use the debug version of the driver, you should see...

Would you tell the needed changes (or add a github pull request) ?

Never heard of such thing. I'll check it

Currently no, but you are free to write a component.

The protocol allows fetching a range of registers. For simplicity that is not implemented in this client. It shouldn't be that slow. Can you measure the RS-485 signal in any...

Yes, the delay could be on any phase; in Raspberry sending, Tracer responding or Raspberry receiving. There might be buffering somewhere. In the pymodbus client there is the method: ```...

If you use the modified Exar kernel module, it always puts the device into RS485 mode.

I have no idea about OS X kernel debugging. All I can find is this document https://developer.apple.com/library/mac/documentation/Darwin/Conceptual/KEXTConcept/KEXTConceptDebugger/debug_tutorial.html and it would require two machines. First step would be trying to reproduce...

I just applied the openwrt change. We'll see if there are older kernel users