Sorry, I did not see your reply, so I was thinking it could not be done.
Here is what I wane do:
I wane use the UniPi also as a feeding computer, that can control the amount plant nutrients, in our greenhouse.
I wane control 5 peristaltic pumps with 12v Steppermotors, 1 big peristaltic pump, that pumps 5 ~ 900 ml/min water, and 4 small peristaltic pumps 0 ~ 25 ml/min, that add the nutrients to the water (I need to ad 0.25 to 3ml/L of different type of nutrients), where they get mixed and then distributed by hoses and controlled solenoid valves to the plants.
I would like use this board to drive the stepper motors, as it is a very affordable solution.
And it comes whit this software to control the stepper controller, but it I think that software is not easily gone work whit UniPi.
With most other solution is also using a Windows driver, so I am up for any other controller solution, if you have any affordable recommendations, I only need to control the rpm's, the 4 small pumps uses 0.75A and the big one 1.8A with both in a 12 or 24V current version.
Is there a way to this with MERVIS, or one with one of the other software solutions supported by UniPi?
For information, here is what I also wane do with the UniPi for determining the best software solution:
I also wane measure the soil moister content whit this sensor, to adjust the amount of watering.
(there is also a RS485 version for if I wane use L503 Neuron, and the maker is also thinking/developing a 1wire version)
Next, to that, I wane control some relays, led drivers and a fan, both with 0~10V, and 1wire U1WTVS and a temp sensor for the water temperature.
I also wane make a weekly feeding schedule, where the amount and/or type of nutrients gets auto adjusted as the vegetables grow.