Description

New Product Alert! The OpenSprinkler Sensor Expander is our upcoming new product that adds 16 channels of analog sensor inputs to your OpenSprinkler v3 controller. It allows OpenSprinkler to interface with a wide variety of external sensors (e.g. temperature, soil moisture, humidity, light, water level) and automatically adjust your programmed water times based on real-world conditions. For additional details, read the full Product Announcement here.

⚠️ Important Pre-Order Information

We are currently taking pre-orders. Shipping is expected to begin in late July 2026.

Order Separately Notice: if you plan to pre-order the Sensor Expander, please place it as a separate order from other in-stock items (such as the OpenSprinkler main controller or Zone Expanders). Any order containing a mix of pre-order and in-stock items will be held until the entire shipment is ready. Thank you for your understanding!

Key Features:

• 16-channel analog inputs, implemented using four ADS1115 high-precision ADCs.
• Dual Voltage Support: the board provides both 5V and 3.3V to support a wide range of sensors.
• Easy Expansion: Plugs directly into OpenSprinkler’s Zone Expander connector, and works either standalone or alongside your existing Zone Expanders.
• On-board 1-Wire Master Controller: for future support of 1-Wire sensors (e.g. DS18B20 temperature probe).

Compatibility:

• Compatible with OpenSprinkler v3 family: v3.0-v3.4.
• Requires Firmware 2.2.1(5) (to be released soon)
• NOT compatible with OpenSprinkler v2.3 and OSPi. However, recent versions of OSPi (v1.5 and v2.0) feature two on-board ADS1115 chips, providing 8 channels of analog inputs out of the box when updated to firmware 2.2.1(5).

For additional details, read the full Product Announcement here.