OpenSprinkler
OpenSprinkler builds open-source irrigation controllers with a fully documented local HTTP API and native MQTT support. No cloud account, no subscription: the controller serves its own web UI and Home Assistant drives it directly over the LAN through the OpenSprinkler HACS integration.
Devices in this brand
Irrigation
2 devicesOpenSprinkler 3 (OS 3.4)
The reference open-source sprinkler controller: 8 zones on board, expandable to 72 with zone expanders, built-in Wi-Fi and OLED display, with an optional wired Ethernet module. Home Assistant runs zones, programs, and rain delays over the fully documented local HTTP API, and no cloud account or subscription exists at all.
OpenSprinkler Pi 2.0
A Raspberry Pi extension board that turns the Pi into a full OpenSprinkler controller running the same unified open-source firmware. It uses the Pi's own Ethernet or Wi-Fi, drives 8 zones expandable to 200 with zone expansion boards, and exposes the same local HTTP API Home Assistant uses to run zones and programs. Ideal when you want irrigation on hardware you already rack in the utility room.