Converting I/O Boxes

[vaughanmcd]

Hi all, I have just recently come over to Home Assistant from Home Seer , Most hardware I was able to bring into HA with out much trouble.
I have 3x custom made I/O interfaces that connected to the network via ethernet. That I need to bring into HA

So now I need help with how to convert these so they will talk to HA, I presume I can use Arduino Home Assistant to reprogram the the mega so the values are published to MQTT?

I need Digital out for the relays
and One Wire DS18S20 for temp sensors
and 3 PWM outputs for RGB device
and Digital Inputs for hardwired sensors

For example one of the I/O interface boxes has 8x relay outputs, 12x digital inputs and a 1x one wire DS18S20 temperature sensor.

Is it passable to code in such a way to have multiple function like this all communicating via MQTT?

Thanks