OpenSprinkler OSPI – Instructions

**NOTE: OSPi does NOT yet work with Raspbian Debian Version 13 “Trixie”, please use Debian Version 12 “Bookworm” **  

OpenSprinkler Pi (Ospi) is an expansion card for the Raspberry Pi (RPI 0; 1 RPi Model A + / B +; RPi 2; RPi 3). It allows RPi to directly access and control the solenoid valves. It optionally comes with a gray case or with a set of laser cut acrylic case parts.

• OSPi Manual Firmware 2.2.1(0) DE
• OSPi Manual Firmware 2.2.1(0) EN
• OSPi Manual Firmware 2.2.1(0) FR
• OSPi Manual Firmware 2.2.1(0) IT
• OSPi Manual Firmware 2.2.1(0) GR
• OpenSprinkler PI2
• Laser cut housing assembly instructions (old housing until 9/2022)
• Instructions for installing OpenSprinkler firmware (English)
• This product requires previous experience with RPi and Linux , as you have to install OSPI software on your own. If you are looking for a watering computer that works out of the box, please purchase the fully assembled and checked one OpenSprinkler 3.0/3.2/AC or DC.
• Link to the OSPi 1.6/2.0 case for 3D printing

Connections, sensors, and valves

a) OSPI 1.5/1.6

b) OSPi 2.0+

When using analog sensors (e.g., the SMT50), you should install pin headers for the analog interfaces (soldering). Then use the OpenSprinklerShop software.

Digital sensors (e.g., the Hunter Rain-Clik) can be connected directly: SN1 or SN2, and GND
Always connect the solenoid valves to COM and the respective station connection

When using more than 8 stations, you should connect both COM connections together.

Notes:

• Always use a 24AC (alternating current) power supply! Never use a DC and definitely not a power supply with a different voltage! e.g., our Standard power supply or a DIN rail power supply.
• If you want to measure the voltage at the station/zone connections, only do so with the solenoid valve connected; otherwise, you will always measure 24VAC, even if the zone is off.
• DO NOT perform current measurements!
• Only use 24VAC solenoid valves with the OSPi.

Software installation:

**NOTE: OSPi does NOT yet work with Raspbian Debian Version 13 “Trixie”, please use Debian Version 12 “Bookworm” **  

Activate via

sudo raspi-config

the I2C bus (3 Interface Options – I4 I2C). Then from the command line:

sudo apt-get install build-essential sudo apt-get install -y libi2c-dev sudo apt-get install -y libgpiod-dev cd ~ git clone https://github.com/OpenSprinkler/OpenSprinkler-Firmware.git cd OpenSprinkler-Firmware sudo ./updater.sh

sudo apt-get install build-essential sudo apt-get install -y libi2c-dev sudo apt-get install -y libgpiod-dev cd ~ git clone https://github.com/OpenSprinklerShop/OpenSprinkler-Firmware.git cd OpenSprinkler-Firmware git fetch --tags git checkout "$(git describe --tags "$(git rev-list --tags --max-count=1)")" sudo ./updater.sh