24V AC valves usually come with just two wires colored in the same way (because AC voltage has no polarity). Latching solenoid valves usually come with a special plug, and the two wires are usually colored differently because the solenoid has polarity. Is there any easy way to tell latching solenoid valves from 24V AC valves? Yes. The OSBee Arduino library has one example of using the Arduino Ethernet shield with OSBee shield to create a web interface for sprinkler control. While OSBee shield itself does not have built-in wireless modules, you can stack it with other Arduino shields, such as RF, WiFi, Ethernet shields, to provide web connectivity. The other OpenSprinkler products, such as OpenSprinkler 2.1s, DIY 2.1u, OSPi 1.4, OSBo 1.0, are all designed for 24V AC sprinkler valves, which operate on 24V AC and require a power adapter / transformer. So it’s very efficient and suitable for battery-operated controllers. These valves internally use a latching solenoid, which only draws power when you open or close the valve, and does not draw power if it remains in the same state. How is the OpenSprinkler Bee (OSBee) different from the other OpenSprinkler products? The main difference is that OSBee is designed to work with battery-operated sprinkler valves. So to use the shield, you will need to provide an existing Arduino board. So what is this Arduino shield version, and how is this different from other OpenSprinkler prodcuts that we carry? Well, an Arduino shield is a circuit board that you plug into an existing Arduino - it does not have a microcontroller chip itself, but contains additional circuitry that extends the basic functionality of an Arduino. While that’s still in the development stage, today I am glad to announce that an Arduino shield version of OpenSprinkler Bee is completed and immediately available for purchase at the Rayshobby Shop. Two months ago, I wrote a blog post about the preview of OpenSprinkler Bee, which is an open-source arduino-based controller for battery-operated sprinkler valves. Update: check out our new standalone OpenSprinkler Bee (OSBee) 2.0 with built-in WiFi and OLED display.
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