Jul 23, 2023 · OpenSprinkler is an open-source Internet web-based sprinkler timer / controller built upon the Arduino platform. Features of the app include: * Easy to understand device status. * Quick program modification. * Launch ad-hoc or defined programs instantly. * Manual mode for convenient testing. Apr 14, 2022 · Its simple, after speaking with DAB , the pump regulates pressure in the line as the solenoids are opened by open sprinkler controller than pushes water to the desired zone. Once the zone solenoid turns off the water pressure in the line signals the pump to turn off. There is a delay of 10 sec which is standard from the manufacture and can be ... If you don’t fill the event name or you use the wrong event name, you won’t receive notification. – Go to your webhooks documentation link to find the IFTTT token. Then put it in OpenSprinkler settings …May 16, 2020 · OpenSprinkler › Forums › Hardware Questions › Recommended flow meter This topic has 5 replies, 4 voices, and was last updated 3 years, 3 months ago by Ray . Viewing 6 posts - 1 through 6 (of 6 total)Check the program’s interval time — it should not be zero. If you just want the program to run once during a day, you can use a large interval (such as 23 hours). As long as the end time minus the start time is less than the interval time, the program will run only once (at the start time). From firmware 2.1.2, the settings for each program ...Once we have the code, we can use OpenSprinkler to simulate the code, thus be able to control remote devices. Heads-up: the following steps require a small amount of soldering. The estimate time for modification is 15 to 20 minutes. Step 1: Decode Remote Power Sockets. Take out the RFToy, plug in a 433MHz receiver (making sure the VCC and …Mar 25, 2021 · Part 2: Add OpenSprinkler Integration. Navigate to Configuration > Integrations > Add Integration. Search for OpenSprinkler. Next, add your OpenSprinkler IP address, login password, and controller name. MAC address can be left blank. Then, click Submit. Assign it to an area like your garage and click Finish. Announcements, questions, and suggestions about the OpenSprinkler Unified firmware. Questions about hardware troubles and hardware design. Explore alternative firmware solutions and software extensions developed by the community. Make comments, suggestions, or request new features. OpenSprinkler › Forums › Hardware Questions › OpenSprinkler This forum has 295 topics, 1,274 replies, and was last updated 1 day, 2 hours ago by kakas . Viewing 26 topics - 1 through 25 (of 295 total) May 20, 2020 · I have created two prototype board variants from Opensprinkler in Kicad. The first one based on the TTGO V2.1 1.6 (ESP32 Lora Board) and the second a dual board that can accommodate an esp32-wroom or an ESP-12E (ESP8266) plus a lora E22-900M3DS-SX1262 module.The solution is to connect one solenoid wire to two station ports (i.e. dedicating two ports for one zone). For example, assume on the OpenSprinkler device, station port 1 is master 1, port 2 is master 2, port 3 is ‘Zone1_primary’, and port 4 is ‘Zone1_secondary’. The solenoid wire of zone 1 is connected simultaneously to port 3 …1) the clock on the controller’s display is frozen at a time earlier in the day. 2) none of the 3 buttons on the controller do anything. 3) the Ethernet module’s internal red LED is still on, and the 2 LEDs on the RJ45 jack seem to reflect normal network activity. 4) the controller still responds to pings. 5) if the controller was in the ...Announcing OpenSprinkler Firmware 2.2.0(1) December 30, 2022 Announcing OpenGarage Firmware 1.2.0 October 7, 2022 Learning Electronics — I/O expander options October 10, 2021Having bought my OpenSprinkler I first tried to connect it via WiFi by buying the successor of the recommended WiFi Router, a TP-LINK TL-WR802N. As the controller is located under the surface about 20m away from our house it didn't get a connection. So I thought about PowerLine and bought an AVM FRITZ!Powerline 510E SetA mobile interface for the OpenSprinkler irrigation device. Designed to allow manual control, program management (preview, add, edit, and delete), initiation of a run-once program, viewing graphical and tabulated representations of log data, viewing device status, adjusting rain delay, and changing of OpenSprinkler settings.Apr 29, 2018 · I recently installed OpenSprinkler and set it up for the Zimmerman algo. I saw a similar effect where the length of watering is reduced. My solution was to lengthen the run times for the stations, which makes the reduced run times a bit longer. Seems to be working OK for now. May 17, 2018 at 7:17 am #50026. Jul 25, 2018 · Weather adjustment methods rely on online weather data, those are independent of your rain sensor, which is your local sensor that does NOT depend on online weather data. If you want to only use rain sensor, please select ‘Manual’ as adjustment method, and configure your sensor as Rain sensor and use that. August 8, 2018 at 12:25 …Open Sprinkler is a free, open source, self hosted, browser based controller for your sprinkler system, and it can run through a Raspberry Pi. It has a simp...Posts. As I understand things, WeatherUnderground has been bought out by IBM and is now a fee-based-only service. Since that happened, I know of several weather-data providers who have taken their data off WeatherUnderground and no longer provide data to that service. In order to keep OpenSprinkler completely open-source, perhaps a …OpenSprinkler is a device that replaces your outdated sprinkler controller and lets you create custom programs and use weather-driven algorithms. You can access and control …Announcing OpenSprinkler Firmware 2.2.0(1) December 30, 2022 Announcing OpenGarage Firmware 1.2.0 October 7, 2022 Learning Electronics — I/O expander options October 10, 2021A quick note that our Black Friday / Cyber Monday sales are on now: all OpenSprinkler products are shown in discounted prices right now, and the deal only lasts till Monday Nov 28. This is the only time of the year that we offer discounted pricing, so if you are interested in buying OpenSprinkler, grasp this chance and don’t let it slip away ...Keymaster. Announcing OpenSprinkler Unified Firmware 2.1.9. First of all, apologies for taking so long to release this firmware. Several technical issues occurred during the last couple of weeks that slowed down the progress. Good thing is that they have been ironed out so today we are ready to release the new firmware 2.1.9.Mar 24, 2021 · Insert each wire and tighten them down with a small screwdriver. The red zone cables should be inserted into the corresponding zones (Zone 1 on the old system goes into #1 on OpenSprinkler). The black P/MV cable is your pump/master valve. Plug this into an available zone (either 7 or 8).Mar 24, 2021 · Unscrew each of them first. Insert each wire and tighten them down with a small screwdriver. The red zone cables should be inserted into the corresponding zones (Zone 1 on the old system goes into #1 on OpenSprinkler). The black P/MV cable is your pump/master valve. Plug this into an available zone (either 7 or 8). service: opensprinkler.set_water_level data: entity_id: sensor.opensprinkler_water_level water_level: 50 Set Rain Delay Example This sets the rain delay of the controller to 6 hours, i.e. all stations will stop and programs will not run until the rain delay time is over.OpenSprinkler Bee. An open-source controller for battery-operated / latching sprinkler valves. The standalone version is powered by AA batteries and controlled remotely via RF. The shield version plugs directly into a standard Arduino . ESPToy. An open-source gadget for the ESP8266 WiFi module. Built-in ATmega644, USB, color LED, thermistor ...Announcing OpenSprinkler Firmware 2.2.0(1) December 30, 2022 Announcing OpenGarage Firmware 1.2.0 October 7, 2022 Learning Electronics — I/O expander options October 10, 2021PCA9555 and PCA9535 both have 16 I/O pins, and both use Totem-poll output, so they can both sink and source a large amount of current. They are used in the current OpenSprinkler 3.2 controller and zone expanders. The only difference between the two is that PCA9555 has built-in pull-up resistor while PCA9535 does not.Oct 10, 2021 · PCA9555 and PCA9535 both have 16 I/O pins, and both use Totem-poll output, so they can both sink and source a large amount of current. They are used in the current OpenSprinkler 3.2 controller and zone expanders. The only difference between the two is that PCA9555 has built-in pull-up resistor while PCA9535 does not. The marking may differ somehow depending on the manufacturer, but in general the marking is not the full part number because there is not enough space to put the entire part number. Many rectifier diodes are interchangeable. For example, D1 on OSPi is a standard rectifier with a minimum of 100V reverse voltage stand.Sep 30, 2014 · Announcing OpenSprinkler Firmware 2.1.0 (Major Upgrade) →. We’ve just released a new OpenSprinkler Firmware Update program, with a video tutorial to walk you through the steps of how to upgrade your firmware. Hopefully this will make it easy for users to transition to the upcoming Firmware 2.1.0, which has a number of significant new ...If you don’t fill the event name or you use the wrong event name, you won’t receive notification. – Go to your webhooks documentation link to find the IFTTT token. Then put it in OpenSprinkler settings …Keymaster. OpenSprinkler is currently designed to work with 24V AC valves only. It’s probably quite difficult to power these valves with battery / solar panel. Technically you need an inverter that converts DC to AC, but I’ve seen discussions that these AC valves can run on DC voltage (al beit less efficient / draws more energy than running ...Apr 29, 2018 · I recently installed OpenSprinkler and set it up for the Zimmerman algo. I saw a similar effect where the length of watering is reduced. My solution was to lengthen the run times for the stations, which makes the reduced run times a bit longer. Seems to be working OK for now. May 17, 2018 at 7:17 am #50026. Address OpenThings 5 Valley Lane Amherst, MA 01002 Email General Inquiry: [email protected] Orders: [email protected] Sales and Distribution: [email protected] Technical Support: support.opensprinkler.com NOTE: if you are seeking support for an existing product purchase from us, please submit a support ticket …For OpenSprinkler 3.x only — one major step forward is the support of OpenThings Cloud (OTC) token, which allows remote access via the OTC cloud server. This eliminates the need for settings up port forwarding, which has been a pain for manual users. OTC has been enabled for our OpenGarage product for a while, and it seems to …Because very few users take advantage of the relay, and it’s kind of expensive, we’ve made the decision to remove the relay from all OpenSprinkler hardware (including OS, OSPi, and OSBo). Also, due to a recent supply chain problem of ATmega644, it turns out that buying ATmega644 ends up costing more than ATmega1284, that’s why …Meet your New Sprinkler System. OpenSprinkler will improve your lawn, garden, or farm irrigation. Create custom programs and use our automatic weather-driven algorithms. …Getting started. Note: All of these screenshots are from examples within the library. In Node-RED, click the menu on the top-right, then Import -> Examples -> node-red-contrib-sprinkler. Create a sequence of zone timer nodes. Here, each timer duration is set to 3s . To create the sequence, you'll need to define a program configuration.OpenSprinkler hat eine Leistungsaufnahme von ungefähr 2,2W = ca 0,1A. Ein Rain-Bild Magnetventil hat einen maximalen Strom von 0,3A. D.h bei 4 Magnetventilen GLEICHZEITIG haben Sie 4x 0,3A + 0,1A = 1,3 A Einschaltstrom, das nächstgrößere Netzteil mit 1,5A sollte genommen werden.The time is calculated using two pieces of information: the NTP time (which is UTC+0 time) and the time zone (this is obtained from the opensprinkler weather server, which calculates your time zone using your location). If you export your configurations to a .json file, and open the file, there is a variable called “tz”, which is the time zone.Jul 10, 2023 · Introduction to OpenSprinkler Firmware 2.2.0 video on YouTube, I doubt it will fulfill my requirements: I have about 8 sprinkler zones plus 9 water dripping zones (patches and hedges). The water dripping zones only require about 1 bar water pressure. My water pump has 4.8 bar – and takes about 900 W and is noisy while running.OpenSprinkler › Forums › OpenSprinkler Mobile and Web App. This forum has 347 topics, 2,144 replies, and was last updated 1 day, 6 hours ago by Ray. Viewing 26 topics - 1 through 25 (of 347 total) 1 2 3 ...Sep 30, 2014 · Announcing OpenSprinkler Firmware 2.1.0 (Major Upgrade) →. We’ve just released a new OpenSprinkler Firmware Update program, with a video tutorial to walk you through the steps of how to upgrade your firmware. Hopefully this will make it easy for users to transition to the upcoming Firmware 2.1.0, which has a number of significant new ...Sep 22, 2019 · Hi there, got your your OpenSprinkler 2 days ago and trying to get all setup done since then. Wifi setup working perfectly. Remote access is the one I struggle with. Went through your topics about port forwarding etc. On my Netgear router, I changed the following Static Leases MAC Address Hostname IP Address Client LeaseRFToy is an Arduino-compatible gadget for interfacing with radio frequency (RF) modules. It can be used as a standalone gadget, or in conjunction with OpenSprinkler (including DC / AC / Pi) to decode and simulate RF signals on RF remote power sockets. This allows OpenSprinkler to switch not only sprinkler valves, but general devices such as lights, …OpenSprinkler would have to be mapped to an external IP with Duckdns or something similar. The external address and port would then be mapped to the skill along with the MD5 password. Because of the required mapping, this would never be a skill approvable by Amazon for publication. clicking button B1. Also, the OpenSprinkler mobile app can automatically scan your local network to discover OpenSprinkler’s IP address. For example, your OpenSprinkler’s IP address might be 192.168.1.22. Next, either use the mobile app, or open a browser and type in the IP address (e.g. 192.168.1.22). The OpenSprinkler web interface allows you to program water schedules and monitor station status through the web. Compared to traditional sprinkler timers, which limit you to a few buttons, dials, and a small screen, the web provides a much more intuitive user interface. You can access the controller using any device that has a built-in web ...Jul 25, 2018 · Weather adjustment methods rely on online weather data, those are independent of your rain sensor, which is your local sensor that does NOT depend on online weather data. If you want to only use rain sensor, please select ‘Manual’ as adjustment method, and configure your sensor as Rain sensor and use that. August 8, 2018 at 12:25 …Troubleshooting and Technical help. OpenSprinkler 3.x Firmware Update Guide. View all 7. Weather and Integrations 6. Using Weather Adjustments. The Interactions between Rain Delay, Rain Sensor, and Weather Algorithm. Creating an IFTTT Applet to receive OpenSprinkler notifications. Using OpenSprinkler with Amazon Echo or Google Home …Zimmerman uses 3 pieces of data: Mean humidity ( defined as (min+max)/2 ), mean temp, and precipitation. They are weighted in the following manner: 30 – mean humidity. (mean temp – 70)*4. Precipitation * 200. Those are all divided by 100 and added together, then 100 is added for a scale, which is then bound to 0 to 200.The OpenSprinkler web interface allows you to program water schedules and monitor station status through the web. Compared to traditional sprinkler timers, which limit you …Aug 6, 2023 · Welcome to the OpenSprinkler application. This app only works with the OpenSprinkler controller which must be installed and setup on your home network. Purchase OpenSprinkler. OpenSprinkler.com Login. Add Controller.Apr 28, 2014 · OpenSprinkler (Arduino-based) This is the story of how learning Arduino inspired me to invent the OpenSprinkler — an open-source, web-based sprinkler controller. I’ve had a passion for making electronic circuits since I was a kid, spending hours looking at schematics and building simple circuits like a single-transistor radio, an electronic cricket, …May 17, 2019 · Step 2: Attach OpenSprinkler to the wall, and re-inser t the wires: Refer to the Hardware Interface diagram and Zone Wire Connection diagrams on the previous pages. All terminal blocks on OpenSprinkler can be unplugged for easy wiring. To unplug, firmly grab both ends of the terminal block, wiggle, and pull it out.According to information from Victoria Gardner, Weather Underground the gateway for obtaining keys on the new API for PWS non-commercial users is planned to open on February 15, 2019. All current WU API keys that are linked to a PWS will stay open through Friday, March 1, 2019. Links to documentation and details about data can be …About. A mobile interface for the OpenSprinkler irrigation device. Designed to allow manual control, program management (preview, add, edit, and delete), initiation of a run-once program, viewing graphical and tabulated representations of log data, viewing device status, adjusting rain delay, and changing of OpenSprinkler settings.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.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 … The OpenSprinkler web interface allows you to program water schedules and monitor station status through the web. Compared to traditional sprinkler timers, which limit you to a few buttons, dials, and a small screen, the web provides a much more intuitive user interface. You can access the controller using any device that has a built-in web ... · Keymaster. 1. yes, it should work with OpenSprinkler. The output of this soil clik sensor is a relay which is a dry contact type. 2. no, this soil sensor is not a dry contact type, it requires an additional microcontroller to ‘interpret’ the result of the soil moisture value. It cannot be used directly with OpenSprinkler.RFToy is an Arduino-compatible gadget for interfacing with radio frequency (RF) modules. It can be used as a standalone gadget, or in conjunction with OpenSprinkler (including DC / AC / Pi) to decode and simulate RF signals on RF remote power sockets. This allows OpenSprinkler to switch not only sprinkler valves, but general devices such as lights, …March 16, 2015 at 9:41 pm #36045. Ray. Keymaster. The ‘parallel stations’ are mainly intended for non-sprinkler stations — now that OpenSprinkler supports radio frequency (RF) stations (such as remote power sockets), you can use it to switch landscape lights, or other general-purpose powerline devices with OpenSprinkler.Both weather sources, Weather Underground and WeeWX provide acceptable weather data for the OpenSprinkler Weather Service. Hosting an own weather server isn’t always needed. At least for Netatmo Personal Weather Stations cloud services like Meteoware can be used to fill the missing link between Netatmo and Weather …OpenSprinkler Pi (OSPi) is an open-source sprinkler / irrigation extension board for Raspberry Pi (RPi). It is based on the design of OpenSprinkler, but its ‘brain’ is an RPi instead of an AVR microcontroller. The idea of OSPi first came when I noticed that many users were setting up RPi to work with OpenSprinkler. OpenSprinkler is designed to be easy to install and use, and is compatible with a wide range of sprinkler valve systems. Ray: tell me more about opensprinkler. ChatGPT: OpenSprinkler is a sprinkler controller that allows users to automate their irrigation systems and customize watering schedules through a web interface or a smartphone app. Posts. As I understand things, WeatherUnderground has been bought out by IBM and is now a fee-based-only service. Since that happened, I know of several weather-data providers who have taken their data off WeatherUnderground and no longer provide data to that service. In order to keep OpenSprinkler completely open-source, perhaps a …Zimmerman uses 3 pieces of data: Mean humidity ( defined as (min+max)/2 ), mean temp, and precipitation. They are weighted in the following manner: 30 – mean humidity. (mean temp – 70)*4. Precipitation * 200. Those are all divided by 100 and added together, then 100 is added for a scale, which is then bound to 0 to 200. Step 2: Attach OpenSprinkler to the wall, and re-inser t the wires: Refer to the Hardware Interface diagram and Zone Wire Connection diagrams on the previous pages. All terminal blocks on OpenSprinkler can be unplugged for easy wiring. To unplug, firmly grab both ends of the terminal block, wiggle, and pull it out. OpenSprinkler Pi (OSPi) is an open-source sprinkler / irrigation extension board for Raspberry Pi (RPi). It is based on the design of OpenSprinkler, but its ‘brain’ is an RPi instead of an AVR microcontroller. The idea of OSPi first came when I noticed that many users were setting up RPi to work with OpenSprinkler.OpenSprinkler is an open-source Internet web-based sprinkler timer / controller built upon the Arduino platform. Features of the app include: * Easy to understand device status. * Quick program modification. * Launch ad-hoc or defined programs instantly. * Manual mode for convenient testing. * Multi-device support.24VAC/500mA sprinkler transformer for OpenSprinkler AC and OpenSprinkler Pi. Please note that this plug is only for 110~120v U.S. outlets. Due to the low current rating (500mA), it is NOT suitable to run more than 2 valves at the same time (i.e. concurrent/simultaneous zones). If you need to run more zones at the same time, please find a 24VAC … OpenSprinkler is an open-source web-based sprinkler controller / irrigation timer built upon open-source hardware and software. It works with standard 24V AC sprinkler valves commonly found in household watering and irrigation systems. You may be planning to buy a conventional sprinkler timer, but chances are that these systems provide a ... Rain gauge is currently not supported: at least not supported if you want to use it to stop watering when a certain amount of rain is received. Technically rain gauge works like a flow sensor — the reed switch internally turns on and off repeatedly to indicate the rate at which rain is accumulated. You can use rain gauge in the sense that you ...RFToy is an Arduino-compatible gadget for interfacing with radio frequency (RF) modules. It can be used as a standalone gadget, or in conjunction with OpenSprinkler (including DC / AC / Pi) to decode and simulate RF signals on RF remote power sockets. This allows OpenSprinkler to switch not only sprinkler valves, but general devices such as lights, …Posts. I’ve created an alternative control software module to control the Raspberry Pi OpenSprinkler system. It’s entirely self contained and doesn’t require python, a web server, or any other heavy software to operate. It can also be compiled to run on the Atmel AVR / Arduino platforms, so theoretically it should run on the AVR ...Jul 25, 2018 · Weather adjustment methods rely on online weather data, those are independent of your rain sensor, which is your local sensor that does NOT depend on online weather data. If you want to only use rain sensor, please select ‘Manual’ as adjustment method, and configure your sensor as Rain sensor and use that. August 8, 2018 at 12:25 pm #51635. May 17, 2019 · Step 2: Attach OpenSprinkler to the wall, and re-inser t the wires: Refer to the Hardware Interface diagram and Zone Wire Connection diagrams on the previous pages. All terminal blocks on OpenSprinkler can be unplugged for easy wiring. To unplug, firmly grab both ends of the terminal block, wiggle, and pull it out. OpenSprinkler is designed to be easy to install and use, and is compatible with a wide range of sprinkler valve systems. Ray: tell me more about opensprinkler. ChatGPT: OpenSprinkler is a sprinkler controller that allows users to automate their irrigation systems and customize watering schedules through a web interface or a smartphone app. May 17, 2019 · Step 2: Attach OpenSprinkler to the wall, and re-inser t the wires: Refer to the Hardware Interface diagram and Zone Wire Connection diagrams on the previous pages. All terminal blocks on OpenSprinkler can be unplugged for easy wiring. To unplug, firmly grab both ends of the terminal block, wiggle, and pull it out.
Keymaster. Announcing OpenSprinkler Unified Firmware 2.1.9. First of all, apologies for taking so long to release this firmware. Several technical issues occurred during the last couple of weeks that slowed down the progress. Good thing is that they have been ironed out so today we are ready to release the new firmware 2.1.9.. Lampionsbet
One thing you can check is the wire resistance. Use an online calculator to compute the wire resistance, such as this one: keep in mind that you need to input the round-trip distance. Typical sprinkler valves draw about 200 to 300mA holding current, and if the voltage drops below 18V AC they are unlikely to stay on.Announcing OpenSprinkler Firmware 2.2.0(1) December 30, 2022 Announcing OpenGarage Firmware 1.2.0 October 7, 2022 Learning Electronics — I/O expander options October 10, 2021Jun 16, 2015 · The MAJOR reasons I bought an OpenSprinkler are the option to use my own WU weather station for input with the Zimmerman Method, the web interface, and the security of NOT having a device depending on the cloud like the Rachio and Blossom controllers. I assumed the Zimmerman method was based on scientific study of irrigation using past and ... I have an old Orbit 12 zone B-Hyve sprinkler controller, but its WiFi module broke. All I had to do was to create a cable to connect the Pi Zero to the header on the power board of the Orbit. This way, the whole Orbit control module is substituted by the OpenSprinkler Pi. Please, see the wiring diagram attached as an Excel spreadsheet.Sale! ESPToy v2. $ 12.99 9.99. ESPToy is a WiFi development board for ESP8266. Version 2.0 has on-board Neopixel color LED, mini buzzer, button, light sensor, LiPo battery jack and charging chip. It has built-in CH340 USB-serial and auto-reset circuit. It’s pre-flashed with a demo software written in Arduino with ESP8266 core.Nov 29, 2012 · Participant. The combination of Raspberry Pi and OpenSprinkler seems to be working quite well. I posted the steps I used to get the pi and OpenSprinkler working together on my blog. At this point the Pi serves the JaveScript files and icons for the UI and handles logging of irrigation events. Dec 13, 2017 · With OpenGarage, you can monitor the door status, close or open it from anywhere, check history, get notifications, and even delegate it to auto-close the door with the automation feature. OpenGarage is an open-source, universal garage door opener. It has built-in WiFi and cloud support. The hardware is based on the ESP8266 WiFi chip. Feb 22, 2020 · Open Sprinkler is a free, open source, self hosted, browser based controller for your sprinkler system, and it can run through a Raspberry Pi. It has a simp... Troubleshooting and Technical help. OpenSprinkler 3.x Firmware Update Guide. View all 7. Weather and Integrations 6. Using Weather Adjustments. The Interactions between Rain Delay, Rain Sensor, and Weather Algorithm. Creating an IFTTT Applet to receive OpenSprinkler notifications. Using OpenSprinkler with Amazon Echo or Google Home …One thing you can check is the wire resistance. Use an online calculator to compute the wire resistance, such as this one: keep in mind that you need to input the round-trip distance. Typical sprinkler valves draw about 200 to 300mA holding current, and if the voltage drops below 18V AC they are unlikely to stay on.OpenSprinkler Pi (OSPi) is an open-source sprinkler / irrigation extension board for the Raspberry Pi. It is an easy and low-cost solution to transform a Raspberry Pi into a …OpenSprinkler Pi (OSPi) is an open-source sprinkler / irrigation extension board for Raspberry Pi (RPi). It is based on the design of OpenSprinkler, but its ‘brain’ is an RPi instead of an AVR microcontroller. The idea of OSPi first came when I noticed that many users were setting up RPi to work with OpenSprinkler..