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 · BUILD
Pick a path. Build one hub.
Four device roles: the hub, the soil probes, the DSC-Control panel and the Sonoff plugs. Build pages exist for the hub and the soil probes; the panel and the plugs are covered on the flashing page. Build order: hub, then probes, then flash everything, then the unplug test (a check that each plug switches itself off when the brain goes quiet; it is not optional). Buy new or salvage. Hard bench.
ESP32 hub build
Headless ESP32: sensors, fans, lamps.
Probe node
RS485 soil probe, repeat per pot.
Dumpster path
Salvage by role.
Flash + first boot
USB once, then over the air.
Schematics
Power domains and signal lines.
Firmware notes
What changed.