Modbus binding - multiple serial masters

Add-ons Bindings
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1

Hi,

Because a lot of serial modbus devices I need to split those devices into two chains (using two USB-RS485 converters).

I prepared openhab.cfg containing something like this below but it doesn’t work.

modbus:serial.slave1.connection=/dev/ttyUSB0:19200:8:even:1:rtu
modbus:serial.slave1.id=1
modbus:serial.slave1.start=0
modbus:serial.slave1.length=8
modbus:serial.slave1.type=coil

…

modbus:serial.slave20.connection=/dev/ttyUSB1:19200:8:even:1:rtu
modbus:serial.slave20.id=20
modbus:serial.slave20.start=0
modbus:serial.slave20.length=16
modbus:serial.slave20.type=discrete

Does OpenHAB support such configuration?

If NO may I ask for some direction related to modbus binding source code changes before I will start reinventing a wheel …

BTW, Connecting any modbus device to the same master (e.g. /dev/ttyUSB0) works just fine. Unfortunately pooling such configuration takes plenty of time (approx. 2s for 20 devices).

Best Regards

Peter

2

Hi,
IMHO it should do that but sadly it doesn’t work at the moment, thats because of

https:// github.com/openhab/openhab/issues/626#issuecomment-121939216
(new users can only put one link in the post, but github links count as more than one - obviously)

Note: Jacek has a similar problem: Modbus serial - failed to read
Best