OpenSprinkler Pro

OpenSprinkler Pro is the new complete solution for smart irrigation control based on the powerful OpenSprinkler Upgrade Board. Thanks to the new housing, the previous upgrade board becomes a fully-fledged, ready-to-use irrigation controller for indoor and protected outdoor areas. The OpenSprinkler Pro combines state-of-the-art hardware with the proven OpenSprinkler firmware and offers flexible, web-based control for gardens, lawns, raised beds, greenhouses, and professional irrigation systems.

At its heart, a modern ESP32-C5 operates, which depending on the firmware variant supports WiFi 6, BLE, Zigbee (for Ethernet variant, as hub/client) as well as Matter (experimental). This makes the OpenSprinkler Pro not only a classic irrigation controller, but also a future-proof platform for connected garden and smart home applications. Control is conveniently via the web interface, the OpenSprinkler app, or directly on the device via OLED display and 3 buttons.

Hardware variants

The OpenSprinkler Pro is available in three hardware variants – suitable for every application area:

• AC – for standard irrigation valves with 24 V AC (the most common variant)
• DC – for DC valves (9–24 V DC), e.g. in 12 V systems or when operated via battery/solar, but also compatible with 24VAC solenoid valves!
• Latch – for latch valves (impulse solenoid valves), which only require a short current pulse to open and close. Ideal for particularly energy-saving installations, e.g. with battery or solar operation.  (9V impulse coils)

Function description

1. Control irrigation intelligently
The OpenSprinkler Pro controls 8 irrigation zones by default and can be expanded up to 72 zones via expander. Schedules, start times, run times, sequential groups, and parallel operation can be flexibly configured.

2. Weather-based adjustment
Irrigation can be automatically adjusted based on weather data. Supported are, among others, Zimmerman, ETo, as well as manual percentage adjustment. Additionally, rain, temperature, and other weather restrictions can be set to save water and supply plants as needed.

3. Sensor integration
Two sensor inputs allow connection of rain sensors, soil moisture sensors, flow sensors, or program switches. Furthermore, the platform also supports BLE sensors, MQTT sensors, remote sensors, as well as RS485/Modbus sensors (via adapter)

4. Flow and error monitoring
With a connected flow sensor, the OpenSprinkler Pro detects unusual conditions such as no flow, pipe break, undercurrent, or overcurrent. This allows defects, cable problems, or leaks to be detected early.

5. App, web, and remote access
The complete operation is carried out locally in the browser or via OpenSprinklerASB App on smartphone, tablet, and desktop. For the OpenSprinkler Pro, the OpenSprinklerASB App is recommended – it supports all Pro functions such as BLE sensors, Zigbee, and advanced statistics. Secure remote access without complicated port forwarding is also possible via OpenThings Cloud (OTC).

6. Smart home and cloud integration
The OpenSprinkler Pro supports MQTT, email notifications, IFTTT, InfluxDB, and – depending on the variant – ESP RainMaker, Zigbee (only with Ethernet), or Matter (experimental). This makes it easy to integrate irrigation into existing smart home and monitoring systems.

7. OTA updates and modern firmware platform
Firmware updates can be conveniently installed over the air via the web interface. The ESP32-C5 platform offers high performance, 8 MB PSRAM, 16 MB flash, and modern security and network features.

8. 100% compatible
Whether zone expander, Analog Sensor Board, RS485 interface, or network adapter (W5500) – everything also fits the OpenSprinkler Pro. The API is also fully compatible and significantly expanded.

OpenSprinkler Pro vs. OpenSprinkler 3.4 – Comparison

💡 A notice: The OpenSprinkler Pro is available in three hardware variants: AC (24 V alternating current), DC (direct current) and Latch (pulse solenoid valves). The OpenSprinkler 3.4 is only offered in the AC and DC variants – a latch variant does not exist for the 3.4.

In short

The OpenSprinkler Pro is the consistent further development into a finished, powerful irrigation controller in a housing – with state-of-the-art wireless technology, flexible sensors, intelligent weather control, three hardware variants (AC, DC, Latch), and extensive integration options for demanding private and semi-professional applications.

All versions in a big comparison →

OpenSprinkler Pro FAQ  

New features

Here are some screenshots of the new features:

New menu items:

ESP32 mode switching

HTTPS certificate

New statistics function

Sensor editor with automatic diagnosis

Edit Zigbee sensor

Edit BLE sensor

Fahrenheit / Celsius conversion – temperature and soil moisture in one diagram

Notifications