This is a controller from Digital-loggers.com called a PLduino that's Mega 2560 based and comes packaged and ready to code and mount on a din rail.
Credits go to @adam and @kreggly for their awesome assistance in coding IDE and python. I needed to have a backup micro to the Rpi3 in case it died or lost communication. Both micros monitor and control a solar power system in my home overseas. This project is a continuation of a previous project and is still a work in progress.
Digital inputs to monitor state, 6 relays to control fans and reset inverter and Rpi3
The PLduino had 6 built in relays, 8 analog inputs, 8 digital inputs and 8 open collector digital outputs. Other GPIO can be accessed on the board itself, scl and sda are available at the RTC which I will add i2c temperature sensors,
Triggers for now are set to notify if Rpi3 is offline/online, I setup a relay on GPIO 16 and set it to invert, on reboot it will go high every time(nature of the beast) and input to the PLduino. Notification if the inverter is in alarm and needs resetting. Notification if inverter goes offline/online.
(Did you use the Scheduling feature?) NO
Dashboard sharing if you want to view project
More to follow later.