OpenSprinkler Pi (OSPi) v1.4+ User Manual Contents
Contents
1. to RPi the default user name is pi and password raspberry 2 OSPi Firmwares The default firmware set to run on start up is the OpenSprinkler Unified Firmware It s available at port 8080 Open a browser and type in http ospi_ip 8080 to start using the firmware The two alternative firmwares are the Python Interval Program written by Dan Kimberling and the sprinklers_pi program written by Rich Zimmerman The welcome page see above has instructions on how to install and run these firmwares If you want to write your own firmware use the provided firmwares as examples In addition in the demo folder there is a simple self test program that shows basic solenoid control Technical Details The OSPi v1 4 circuit design consists mainly of a 24V AC to 5V DC switching converter based on LM2596S 5 0 shift register 74HC595D solenoid drivers based on BT1308W triac RTC with battery DS1307 4 channel ADC PCF8591T RPi Pin Uses OSPi v1 4 uses the following GPIO pins on the RPi shaded in red The other pins are free to use The power pins as well as SDA SCL pins can be shared with other devices All 40 pins from RPi are mapped out in the pinout area at the upper left corner of the circuit board The layout of the mapped out pins match the GPIO pins The pins uses by OSPi are marked by a white outline 3 3V from RPi SDA SCL Shift Register CLOCK GND Shift Register OE Shift Register DATA Shift Register LATCH 5V2. DC power to RPi 5V DC power to RPI GND Rain Sensor Relay N 4 v OC E OO Specifications Terms and Conditions Input Voltage DC Output Current Number of Zones AC Output Current Over voltage Protection Over current Protection On board Relay Size Weight 22V AC to 30V AC 500mA 5V to power RPi 8 on the OSPi expandable by linking zone expansion boards 800mA continues 24V AC per zone station 8A impulse inrush 48V bi directional TVS on each zone AC input and rain sensor terminal 2A on AC input 1A on 5V DC 3A 250V AC or 30V DC Though rated at 250V AC it s not recommended for power line voltage due to PCB traces and pinout size 135mm x 100mm x 32mm 5 3 x 4 x 1 26 150g 5 302 w o RPi OpenSprinkler Pi OSPi is an open source project The hardware design and software code are made publicly available under the Creative Commons Attribution ShareAlike CC BY SA 3 0 license The product is open source for educational purpose and to promote innovations The hardware and software are provided as is We Rayshobby LLC are not responsible for any damage or accident that may occur due to hardware or software error or during the assembly use and modification of OSPi Open Source Links OSPi Github Repository OSPi homepage OpenSprinkler
3. OSPi s OUT port to the expansion board s IN port The connector on the cable is polarized with a bump on the top so there is only one way to plug it If you have multiple expansion boards you can daisy chain them in the same way by following the OUT gt IN links When using zone expansion boards the sprinkler valves are Ss wired the same way as before one wire from each valve should come together and go to the COM terminal on the OSPi and the other wire from each valve goes to an individual station terminal Main Controller Zone Expansion Board Extension Cable COM 123 45 67 8 12345 67 8 6 Rain Sensor If you have a rain sensor you can connect it to OSPi v1 4 via the rain sensor terminal The rain sensor has two wires and is essentially a rain activated switch The OSPi software can decide what to do when rain is detected such as turn off stations or ignore rain 7 Analog Digital Converter Advanced Topic OSPi v1 4 has a built in PCF8591T A D D A converter which provides four 8 bit analog inputs and one analog output The analog inputs can be used to read analog sensors such as light temperature soil humidity Details on how to use this converter can be found in this blog post Software Setup 1 OSPi Pre configured SD Image A pre configured SD card image is provided for you to quickly set up software for OSPi e The latest version OSPi SD Card Image 2 with Unified Firmware update 05 31 15
4. OpenSprinkler Pi OSPi v1 4 User Manual Updated May 31 2015 Contents Te gore Tag eT FMCW EINE CO eee E recs pina sleec tease ees EA E EE E EE A AO E E S AANE SOU E E E E De OSG POW OO ODD e E E E E E AE E tacegsacncteensousees 2 AEREO OSP TTT IW P ONDE IVI aa E E N A Wiring sprinkler VA VSS sesat E O ALON EPN ON BOGT T Rie TE O a E E 7 Analog Digital Converter Advanced TOC sss sese SONNE ED e a onautieceoaqdunesenicnceniaauaedsnenssontasdeimaneeessaetuessaacinssaienbasdsatwenadateate B SPV Preconigeured SD MaE E coenen A E E PO PEEN OS ea E S MEIC FIC al DE tA e e A E E E E E E E E RRIPI USC n E eee ee eee eee ere arene eee ee OL eea Terms VOC ON CICLO TNS T opem ource Ba aaa eset acinar T T T acamtm ons eioonecetetons OpenSprinkler Introduction OpenSprinkler Pi OSPi is an open source sprinkler irrigation extension board for the Raspberry Pi It s an easy and low cost solution to transform your Raspberry Pi into a capable sprinkler controller with unlimited number of stations for lawn and plant watering farm irrigation and other similar applications The OSPi v1 4 kit includes the enclosure with a clear acrylic window assembled and tested OSPi circuit board terminal blocks and microSD to SD adapter excluded in the Plus version The built in components include 24V AC to 5V DC switching regulator solenoid drivers rain sensor terminal DS1307 RTC and battery PCF8591T 8 bit A D D A converter 4 input and 1 ou
5. ler com 2 Attach RPi to OSPi OSPi has two support pillars that match the screw holes on RPi First remove the top screws from the support pillars then plug RPi into OSPi through the 2x20 pin headers with SD card slot facing the left and USB and Ethernet jack facing the right Double check the orientation and make sure all pins are aligned The two screw holes should also match the support pillars Insert RPi all the way to the end The USB and Ethernet connector should go through the cutouts on the PCB Finally tighten the two screws 3 Web Connectivity OSPi fits a nano size USB WiFi dongle You can insert the dongle into any of the available RPi USB ports If you prefer wired connection note that there is no special cutout for the Ethernet cable therefore you need to use a Dremel to make a cutout yourself in order to allow Ethernet cable to pass through 4 Wiring Sprinkler Valves To connect a sprinkler valve insert one wire to the COM common terminal and the other wire to any of the station terminals 1 8 The COM terminal has two ports they are internally connected so either port is fine To connect multiple valves one wire from each valve should come together and go to the COM terminal and the other wire from each valve goes to an individual station terminal See the diagram below COM 123 45 67 8 5 Zone Expansion Board To connect a zone expansion board use the extension cable you received to link the
6. o MD5SUM edc2264a267d7330441855bafdb69dea The process to burn the image onto an SD card is the same as burning a Raspbian image Below is a brief summary Detailed instructions can be found on this website e Decompress the image file 7z to your computer e On Windows use the 7 zip software e On Mac use the unarchiver software e Linux has built in support for 72 files e Insert an SD card 4GB or above to your computer Back up any important file on the SD card e f using microSD card you need a microSD to full size SD adapter or USB adapter e On Windows use the Win32Disklmager software e On Mac or Linux use the dd command in a terminal For example sudo dd bs 4M if ospi2new img of dev partition_ to burn TLO e IMPORTANT make sure you have typed in the correct partition name if you accidentally typed in the wrong partition name you may end up wiping out your hard disk Once the SD card is ready pop it into your RPi As WiFi is not configured yet you should first connect RPi directly to your router with a wired Ethernet cable or connect it to a screen and keyboard set the WiFi SSID and password then you can use the wireless connection Next open a browser and type in http ospi_ip where ospi_ip is the RPi s IP address such as http 192 168 x x You should see a welcome page with further instructions If you see this page congratulations the image is successfully burned onto your SD card e To ssh or log in
7. tput fuse per station transient voltage protectior The image on the right below shows the final assembled product sapu sdguedoO To get started you will also need the following which are NOT included in the kit and have to be purchased separately e a Raspberry Pi any revision NOTE OSPi 1 4 only supports RPi 1 A B or RPi 2 e anano size USB WiFi dongle or alternatively a RJ45 Ethernet cable if not using WiFi e a4GBor above microSD card e 24V AC sprinkler transformer output voltage 22V AC 30V AC note that it s AC not DC e 24V AC sprinkler valves note that it s 24V AC valve not DC or latching solenoid valve Hardware Interface The left image marks the connectors and RPi mapped out pins The right image below marks the locations of the USB WiFi dongle SD card and wired Ethernet cable if not using WiFi on the RPi OSPi 1 4 RF Transmitter Zone Expansion Connector COM Rain sensor common wire Stations 1 8 Terminal Hardware Setup 1 Test Power Supply Insert the sprinkler transformer wires into the orange screw terminal then plug it in to the matching terminal on OSPi The green LED should light up indicating power is on See pictures below Warning if the LED doesn t light up please unplug the power immediately Check if there is any visible damage If you have a multimeter check if the fuse is still good If you can t figure out the problem send an email to support opensprink
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