SIP Irrigation Control is a free open-source Raspberry Pi irrigation controller. See features, hardware options, licensing, and how it compares.
SIP (Sustainable Irrigation Platform) is a free, open-source irrigation controller application written in Python that runs on a Raspberry Pi, letting DIY users build their own smart sprinkler, drip, or hydroponic watering system.
The project is maintained by a developer known as Dan-in-CA and distributed on GitHub under a GNU GPL license, with documentation hosted on GitHub Pages and community discussion in a dedicated project forum.
Unlike commercial smart irrigation controllers sold as sealed hardware products, SIP is software-first: users supply their own Raspberry Pi and choose from several supported interface boards to connect to physical irrigation valves.
The core of SIP is a web-based control interface built with JavaScript and jQuery, giving users a responsive dashboard for scheduling and monitoring irrigation zones from any browser on their network, including phones and tablets.
Hardware flexibility is a major strength: SIP supports basic relay boards for AC or DC device control, branded OpenSprinkler.com interface boards, and TIAO Smart Sprinkler Pi controllers including 16-station variants, giving users a range of budget and feature options.
A plugin architecture lets the community extend SIP's functionality without touching the core codebase, and built-in Node-RED support enables graphical, flow-based automation alongside HTTP and MQTT connectivity for integration with home automation or IoT systems.
SIP is completely free and open source; there is no license fee, subscription, or paid tier for the software itself.
Actual project cost comes from hardware: users need a Raspberry Pi (typically 35 to 75 dollars) plus an interface board such as a relay board, an OpenSprinkler.com board, or a TIAO Smart Sprinkler Pi controller, along with a weatherproof enclosure for outdoor installation.
Because there is no commercial vendor behind SIP, there are no support contracts or paid upgrade tiers; all support is community-driven through the project's GitHub issues and forum.
SIP, or Sustainable Irrigation Platform, is a free open-source Python application that turns a Raspberry Pi into a customizable irrigation controller for sprinklers, drip systems, and hydroponics.
Yes. The SIP software is free and open source under a GNU GPL license. Users only pay for the Raspberry Pi and interface hardware they choose to use.
You need a Raspberry Pi plus an interface board, such as a basic relay board, an OpenSprinkler.com board, or a TIAO Smart Sprinkler Pi controller, to connect the software to physical irrigation valves.
No dedicated mobile app is documented. SIP is controlled through a responsive web-based interface accessible from any mobile or desktop browser.
Yes. SIP supports a plugin architecture for adding functionality without modifying the core code, and it integrates with Node-RED for custom automation flows.
SIP is maintained by an independent open-source developer known as Dan-in-CA, with the project hosted on GitHub and GitHub Pages.
SIP is distributed under the GNU GPL open-source license.
SIP is primarily designed for hobbyist, residential, and small-scale garden or hydroponic use rather than large commercial agricultural operations.