Hi Ben,
It looks more like a "black box" (recorder, data logger). HW: One PC (mini-ITX, SSD 240Gb), 32AI (4/20mA, +status AI), 59 electrical parameters from the power meter. Recording time every 1 second. SW: debian9, pwrrt (v5.6), +mysql (DB on 90 days, can be expanded up to 2 years), WiFi, 3G, out to Modbus/TCP (129 registers) and gate on out to cloud. Looks like a metal cabinet with one light bulb. Integrated UPS (10 hours of battery life). Used on a physical test facility.
Ben, thanks for your video (tutorial No10)! All your videos are a big help!!
Special thanks for the guidance "Guide on how to create a debian packaged for a project".
/Sergey