Add delay between Polls for devices in Modbus RTU

Hi Phil
It’s games changer for specially when you add slave mode in ignition.
Could I know the price?
Does your serial lib work in ARM like raspberry PI?

Tentatively, $400.

It should. It is in the list:

Note that this is the same library that IA switched to in the midst of v8.0, and made part of the platform before v8.1 came out. I'll be leveraging that when I release support for v8.1.

I test that lib and it works.
Can we have separate timeout setting for each ID on the same serial link?
Can we access setting via opc ua? Like timeout and dynamicly change it?

No, the timeout is per-link. Sorry. But the minimum time between requests is per-unit.

No, the architecture requires the settings be in place at device startup, so they are part of the settings record.

Does this RS-485 Mode new feature solve this issue in v8.1.25 rc1?

Added an "RS-485 mode" setting to Modbus RTU driver.

No, just turns on “RS-485 Mode” on the underlying serial library, which I think just enables tx/rcv on the RTS pin.