Build notes for the v4 kit. Pins and parts come from the firmware on the main branch (hub and soil probes 8.5.0.0; Sonoff plugs and control panel 8.3.0.0). Setting up a finished kit instead? Start with the user guide. Power down between changes. A couch already killed a board. Mains wiring must follow your local rules and be done by a licensed electrician where the law requires it.
DSC · SCHEMATICS
Power domains and signal lines.
Low-voltage sense and PWM on one side. Mains appliances only through plugs that switch off when the brain goes quiet. This is a map, not a wiring drawing: the pin tables are on the hub and soil probe build pages.
The wiring drawings are not published. This page is the public map: low-voltage on one side, mains only through Sonoff plugs that boot OFF and each switch themselves off when they have not heard from the brain for their grace time (heater 60 s, heat mat and humidifier 90 s, dehumidifier 240 s).