![]() I can’t think of anything equivalent on Raspi. You can put the mcu to sleep most of the time to save power. – For battery powered controllers, the mcu-based circuit is obviously more suitable. Also, you can easily get a small quantity of mcus from retailers, while embedded linux chips are usually only sold in large quantity. As you’ve probably noticed, the OpenSprinkler has a DIY version for anyone who wants to build it from scratch. – Mcu-based circuits are easier to prototype at home. You may have seen those airflight entertainment systems getting stuck on a log-in or boot screen, and requires manual rebooting. – On a related note, if something goes wrong during booting (say the file system crashes or a device fails), Raspi might get stuck. ![]() – Embedded linux is relatively slow to boot up: if you want to restart the controller, a mcu-based one would restart instantly, while it may take 20-30 seconds for Raspi. Here are some differences I can think of: ![]() The content below has been updated and moved to a dedicated product page for OSPi at. As soon as I figured this out, I couldn’t resist ordering a small batch of prototype PCBs right away. At one point I started thinking: wouldn’t it be nice to design an extension board for Raspi, so that it can directly talk to sprinkler valves through the GPIO pins, without an additional layer of microcontorller and Ethernet controller? This has been on my todo list for quite a while, until one day I was playing with Raspi, and I suddenly that the I can actually fit a Raspi inside the existing OpenSprinkler enclosure. There are many good reasons to do so, for example, to enable logging, to customize the default Javascript files, and to allow more advanced features such as weather-based and learning-based control. The idea of OSPi first came when I noticed that several OpenSprinkler users were setting up Raspi to work with OpenSprinkler. I bought a Raspi a few months ago, and have been quite happy with it since then, but I at that point I had not thought about designing an OpenSprinkler extension board for it. Since the beginning of Raspi, there have been many published DIY projects on how to use Raspi for home automation need. A more dedicated webpage will be available soon. This post serves as a quick introduction to the hardware and software setups. Hi, I am glad to announce the arrival of OpenSprinkler Pi ( OSPi) 1.0 - a sprinkler or irrigation extension board for Raspberry Pi that provides direct access and control of sprinkler valves.
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