Build notes for the v4 kit. Pins and parts come from the firmware on the main branch (train 8.2.0.0). Setting up a finished kit instead? Start with the user guide. Power down between changes. A couch already killed a board. Australian mains work needs 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. Buy new or salvage. Hard bench. The unplug test is not optional.
Hub
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.