![]() Fortunately we have mapped all available pins to the OSBo’s pinout area. Because the BeagleBone Black is placed facing down, it’s not easy to directly access these pins. They are useful for extending the functionality of OSBo. ![]() The BeagleBone Black has a large number of GPIO pins. For instructions on how to connect OSBo to zone expansion boards, please check the online user manual. The number of stations has no software limit - you can go up to a large number of stations, limited only by your SD card size. There is a built-in shift register connector which allows it to be linked to zone expansion boards to enable more stations. The OSBo board itself controls 8 stations. The Beagle is directly plugged into the pin headers, and secured via three support pillars and screws. Connection from Beagle to OSBo is done through on-board 2×10 pin headers. It can provide regulated 5V power to BeagleBone Black with up to 750mA output current, which is sufficient to drive the BeagleBone Black with a USB WiFi dongle. OSBo makes use of four GPIO pins to send control signals to the shift register, two I2C pins (SDA, SCL) to interface with the RTC, and two additional pins to interface with rain sensor and the mini-relay. The mini-relay’s contact rating is 120VAC/2A). In addition, it includes a rain sensor port, per-station bidirectional TVS (transient voltage suppressor), and a 5V mini-relay for general-purpose switching (such as switching garage doors etc. The circuit of OSBo consists of a 24VAC to 5VDC switching converter, a shift register, triacs, DS1307 RTC, CR1220 backup battery, and zone expansion connector. You can also make use of the digital/analog pins of the BeagleBone Black to interface with external sensors and actuators. OSBo is expandable - by linking OpenSprinkler Zone Expansion Boards, you can extend to an unlimited number of stations. By stacking a BeagleBone Black on top of OSBo, you instantly have a low-cost, web-connected sprinkler controller. OSBo makes use of BeagleBone’s GPIO pins to directly control sprinkler valves. ![]() It is based on the design of OpenSprinkler, but its ‘brain’ is a BeagleBone instead of an AVR microcontroller. ![]() OpenSprinkler Beagle (OSBo) is an open-source sprinkler / irrigation extension board for the BeagleBone Black. To receive updates, you can sign up to the Rayshobby RSS Feed, Google+, Twitter, or OpenSprinkler Email List.OSBo software setup is easy: download the pre-configured SD card image for OSBo, burn it to a microSD card, pop it in to your BeagleBone Black, and you are ready to go! The microSD card image contains Dan’s interval_program, Samer’s mobile web app, and the Google Calendar-based scheduling program.Search ‘opensprinkler’ in iOS App Store, Android Play Store, or Windows Phone Store, then install the app. OpenSprinkler new mobile app is now available on all platforms.Please check the OSBo v1.1 User Manual for instructions.OpenSprinkler Beagle v1.1 is now available at Rayshobby Shop. OpenSprinkler Beagle (OSBo) An Open-Source Sprinkler Extension Board for BeagleBone Black ![]()
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