Input & outputmodules & arduino

[bartmarchand]

Hello,

Is there any information about connection inputmodules and outputmodules to an arduino?

I want to replace the controller but need to keep the input and outputmodules.

The idea was to program a modbus to ihc converter (or mqtt or another protocol). The modbus part of the arduino is easy, the ihc not.

[niklascp]

Hi, have a look at https://www.dingus.dk/arduinoihc/

[bartmarchand]

Yes, I know the work of Dingus.

He's creating Arduino input and output modules.

I want to do the opposite, controlling the output modules with an arduino.

[Jonas Tehler]

The communication protocol is the same. You could use the code from ArduinoIHC. IHCInput to listen to input modules and IHCOutput to talk to output modules. I think the only problem is that the IHCInput class only listens to the first 8 bits since it is designed to emulate an output module with just 8 outputs. Change that to 16 bits and it should work as a controller. I'm trying to do the same thing as you and I have a working prototype for listening to my input modules and will start working on output modules next. 

[bartmarchand]

I've succesfully created a modbus to IHC output converter, with the Basicoutput example.

Now I want to do the same for the input module, with the Basicinput example. The Basicinput code is loaded into an arduino, dataline from the input module connected to the arduino.

I get no readings from it when I change an input on the inputmodule.

Any tips? I think I'm doing something wrong. I'm sure the inputmodule works.

[Lars Jacobsen]

You Can check by connecting input module directly to output module without anything between. Them it should work just as a releay

[bartmarchand]

So strange:

IHC inputmodule connected to IHC outputmodule: OK

Arduino BasicOutput connected to IHC outputmodule: OK

Arduino BasicOutput connected to Arduino BasicInput: OK

IHC inputmodule connected to Arduino Basicinput: NOK

I'm lost...

[bartmarchand]

I did some scope measurements, signal is exactly the same.

[Marius K. Bjerregaard]

.