The firmware is completely open source Arduino code, and is hosted on github.
The kit doesn’t come with a 24V transformer, so I salvaged one from one of my DewBees. You can see in the photo below that the rightmost 4 triacs are all askew due to my messy rework: I inadvertently soldered 4 of the triacs on the main controller board backwards, and had to clip the leads and solder them onto the top of the PCB in order to reverse the connections. It took me about 3.5 hours to assemble both the main board and extension board, and one hour of that was spent undoing a careless error on my part. The step-by-step assembly instructions are very clearly written, with lots of photos, and easy enough for even a noob to follow. Ray’s Hobby has great documentation on their website.
The components were also bagged in separate groups, which made finding the parts easier: The kit came nicely packaged, with bubble wrap protecting all of the delicate parts: Shipping was very fast, and I received a box a few days after I placed the order. Pre-assembled SMT boards are also available at higher cost. Since I needed 14 channels, I ordered a DIY OpenSprinkler 1.4u kit ($89.99) and an extension board ($25.99). completely solid state, using 8 triacs instead of relays.8 channels, extensible in increments of 8 channels with extension boards.web-browser-based interface + direct HTTP interface for writing your own scripts.ATMega 328 MCU, 16×2 monochrome LCD, Ethernet, and onboard USBtinyISP.open source hardware and Arduino-compatible firmware.OpenSprinkler is an Arduino-compatible system with: As soon as I saw it, I knew that I shouldn’t bother reinventing the wheel. The control aspect seemed relatively easy to handle, but then I started thinking about how much work the web interface would entail.īefore starting on my own DIY sprinkler, I decided to search for existing open source sprinklers and happened upon Ray’s Hobby’s OpenSprinkler. The RPi doesn’t have enough GPIO pins to handle my 14 channels + an LCD display, but I figured that I could cook something up with I2C. One thing I’ve found with Arduino is that it’s easy to run low on memory when implementing web interfaces on it. The RPi seemed perfect for the task, with its built in Internet connectivity, SD card, and tons of RAM. An Internet-connected sprinkler with a web browser interface immediately came to mind.
I recently started playing with my Raspberry Pi, and was looking for a project to do with it, as a way to learn the ropes. In addition, I thought it would be cool to be able to control it from the Internet, so I could change the settings if necessary, when away from the house. automatic clock setting after power outage.non-volatile program storage, so no reprogramming needed after long power outages.It was high time for a replacement, but I couldn’t find anything that met my all of requirements at the hardware store: Another irritant is that they use a 9v battery backup which doesn’t last very long, so every time we have a long power outage, I’ve had to spend 1/2 hour reprogramming them. Not only were they a pain in the ass to program, but for the past year, they’ve been flaky, watering on the wrong days. I’m sure that they were fancy high-end stuff when they were purchased, but they look like they’re over 20 years old. In the front yard alone, there are 14 channels, which have been controlled by two very old Irri-Trol DewBee 7-channel units. My house has a crazy amount of sprinklers.
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