My New IrrigationController

  • Last summer during vacation, was quite hot at my place. My green grass in the garden became ... brown and yellow - there was nobody to irrigate and was no rain, of course!
    So I made a decision to buy irrigation controller and all that stuff. I wanted to have 7-8 zones, BT or wireless control, temperature and rain based control, RTC, Keypad, etc. The problem was that nobody had it or was to expencive.
    So long story short I came up with idea to build one with all those features i need. Without having experience with uC I start to learn (google and youtube) a bit and build some "prototypes". Than IrrigatonController ver 1.0 was ready (December 2015):0_1462825721811_1.jpg
    Than I found @petewill IrrigationControler at youtube - but it was to hard for me from software (all this MySensors) and hardware side - I thought!
    So I built new one - well it is almost done.
    It is tested and working, few things are still missing like running without HA controller and rain sensor. Anyway I post some pictures and script what I've done. At my place it is working under Domoticz and manual (keypad). Tomorrow final wiring!
    0_1462826941290_IMG_20160509_203348.jpg .

    Any comments are more than welcome, know that script need some more work - but it is just a beginning.

     * The MySensors Arduino library handles the wireless radio link and protocol
     * between your home built sensors/actuators and HA controller of choice.
     * The sensors forms a self healing radio network with optional repeaters. Each
     * repeater and gateway builds a routing tables in EEPROM which keeps track of the
     * network topology allowing messages to be routed to nodes.
     * Created by Henrik Ekblad <>
     * Copyright (C) 2013-2015 Sensnology AB
     * Full contributor list:
     * Documentation:
     * Support Forum:
     * This program is free software; you can redistribute it and/or
     * modify it under the terms of the GNU General Public License
     * version 2 as published by the Free Software Foundation.
     * based on Version 1.0 - Henrik Ekblad
     * Version 2.0 - Marek Dajnowicz
     * Example sketch showing how to control physical relays.
    // Enable debug prints to serial monitor
    #define MY_DEBUG
    #define MY_RF24_CE_PIN A8 // żółty 51
    #define MY_RF24_CS_PIN A9 // pomarańczowy 53
    // Enable and select radio type attached
    #define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    #define MY_NODE_ID 66
    // Enable repeater functionality for this node
    #include <Wire.h>
    #include <Time.h>
    #include <SPI.h>
    #include <MySensor.h>
    #include <LiquidCrystal.h>
    #include <LiquidCrystal_I2C.h>
    #include <DallasTemperature.h>
    #include <OneWire.h>
    #include <DS3232RTC.h>  // A  DS3231/DS3232 library
    #include <Keypad_I2C.h> // Klawiatura na I2c
    #include <Keypad.h> // klawiatura
    #define RELAY_1  2  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
    #define NUMBER_OF_RELAYS 8 // Total number of attached relays
    #define RELAY_ON 1  // GPIO value to write to turn on attached relay
    #define RELAY_OFF 0 // GPIO value to write to turn off attached relay
    #define ONE_WIRE_BUS 22 // Pin where dallase sensor is connected MEGA256
    #define MAX_ATTACHED_DS18B20 16
    #define CHILD_ID_SPRINKLER1 1
    #define CHILD_ID_SPRINKLER2 2
    #define CHILD_ID_SPRINKLER3 3
    #define CHILD_ID_SPRINKLER4 4
    #define CHILD_ID_SPRINKLER5 5
    #define CHILD_ID_SPRINKLER6 6
    #define CHILD_ID_SPRINKLER7 7
    #define CHILD_ID_PUMP 10
    #define CHILD_ID_TEMP 11
    #define CHILD_ID_TEMP2 12
    OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
    DallasTemperature sensors(&oneWire); // Pass the oneWire reference to Dallas Temperature.
    boolean timeReceived = false;
    byte clock[8] = {0x0, 0xe, 0x15, 0x17, 0x11, 0xe, 0x0}; // fetching time indicator
    byte raindrop[8] = {0x4, 0x4, 0xA, 0xA, 0x11, 0xE, 0x0,}; // fetching Valve Data indicator
    LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address to 0x27
    DeviceAddress addrT1 = { 0x28, 0xFF, 0x9F, 0x80, 0x93, 0x15, 0x04, 0xF7 }; //DS18 Dallas temp.
    float T1;
    float lastTemperature[MAX_ATTACHED_DS18B20];
    int numSensors = 0;
    MyMessage msgValve1(CHILD_ID_SPRINKLER1, V_LIGHT);
    MyMessage msgValve2(CHILD_ID_SPRINKLER2, V_LIGHT);
    MyMessage msgValve3(CHILD_ID_SPRINKLER3, V_LIGHT);
    MyMessage msgValve4(CHILD_ID_SPRINKLER4, V_LIGHT);
    MyMessage msgValve5(CHILD_ID_SPRINKLER5, V_LIGHT);
    MyMessage msgValve6(CHILD_ID_SPRINKLER6, V_LIGHT);
    MyMessage msgValve7(CHILD_ID_SPRINKLER7, V_LIGHT);
    MyMessage msgPump(CHILD_ID_PUMP, V_LIGHT);
    MyMessage msgT1(CHILD_ID_TEMP, V_TEMP);
    MyMessage msgT2(CHILD_ID_TEMP2, V_TEMP);
    /**** Kepad settings */
    const byte ROWS = 4;
    const byte COLS = 4;
    char keys[ROWS][COLS] = {
      {'1', '2', '3', 'A'},
      {'4', '5', '6', 'B'},
      {'7', '8', '9', 'C'},
      {'*', '0', '#', 'D'}
    byte rowPins[ROWS] = {47, 45, 43, 41};
    byte colPins[COLS] = {39, 37, 35, 33};
    int i2caddress = 0x20;
    Keypad_I2C kpd = Keypad_I2C( makeKeymap(keys), rowPins, colPins, ROWS, COLS, i2caddress );
    bool state;
    // system messages
    const char *string_table[] =
      "     WELCOME! =)", 			// 0
      "DOMOTICZ TIME", 				// 1
      "WATERING",  					// 2
      "    SYSTEM CHECK  ",			// 3
      "  STARTING UP THE",			// 4
      "  WATERING SYSTEM", 			// 5
      "    Popmp is ON ", 		    // 6
      "      MySensors",		   	// 7
      "   Watering System",	      	// 8
      "   Please wait !!"	        // 9
    const char *string_table2[] = {
      "Strefa 1", "Strefa 2", "Strefa 3", "Strefa 4", "Strefa 5", "Strefa 6", "Strefa 7", "Pompa zasilająca" // ZONE 1...2...
    const unsigned long tUpdate = 60000; // update interval for temp sensors
    unsigned long t0;
    void setup()
      for (int sensor = 1, pin = RELAY_1; sensor <= NUMBER_OF_RELAYS; sensor++, pin++)
        pinMode(pin, OUTPUT); // Then set relay pins in output mode
        digitalWrite(pin, RELAY_OFF); // set all relays OFF
        saveState(sensor, state); // save data at startup.
      kpd.begin();  //keypad
      sensors.begin(); //dallas temp
      sensors.setResolution(addrT1, TEMPERATURE_PRECISION);
      lcd.begin(20, 4); //(20 characters and 4 line display)
      lcd.createChar(0, clock);
      lcd.createChar(1, raindrop);
      lcd.setCursor(0, 1);
      lcd.setCursor(0, 3);
      for (int i = 0; i < 20; i++) {
      lcd.setCursor(0, 1);
      (lcd.setCursor(0, 3));
      for (int M = 1; M >= 0; M--) // countdown
        lcd.setCursor(10, 3);
      lcd.home ();
    void presentation()
      // Send the sketch version information to the gateway and Controller
      sendSketchInfo("Watering", "2.0");
      for (int sensor = 1, pin = RELAY_1; sensor <= NUMBER_OF_RELAYS; sensor++, pin++) {
        // Register all sensors to gw (they will be created as child devices)
        present(sensor, S_LIGHT, string_table2[sensor - 1]); // use CHILD ID names from table
      present(CHILD_ID_TEMP, S_TEMP,"Dallas");
      present(CHILD_ID_TEMP2, S_TEMP,"RTC Temp");
    void loop()
      domoticztime(); // to PRINT the time from conroller
      keypad(); // READING KEYPAD
      if ((millis() - t0) > tUpdate) ServerUpdate();
    void ServerUpdate() 
      T1 = sensors.getTempC(addrT1);
      send(msgT1.set(T1 , 1));
      int t= RTC.temperature()/4;
      lcd.setCursor(11, 2);
      lcd.setCursor(11, 3);
      t0 = millis();
    void domoticztime()
      lcd.setCursor(0, 2);
     // lcd.print(string_table[1]);
      //lcd.setCursor(2, 2);
      lcd.setCursor(1, 2);
      int min = minute();
      if (min < 10) lcd.print("0");
      lcd.setCursor(0, 3);
    void keypad()
      char key = kpd.getKey(); delay(50);
      if (key == '*') ALL_OFF();
      if (key == '#') WRONG();
      if (key == '1') ZONE_1();
      if (key == '2') ZONE_2();
      if (key == '3') ZONE_3();
      if (key == '4') ZONE_4();
      if (key == '5') ZONE_5();
      if (key == '6') ZONE_6();
      if (key == '7') ZONE_7();
      if (key == '8') WRONG();
      if (key == '9') WRONG();
      if (key == '0') WRONG();
      if (key == 'D') DEBUG();
    void DEBUG()
    {for (int sensor = 1, pin = RELAY_1; sensor <= NUMBER_OF_RELAYS; sensor++, pin++)
        state = loadState(sensor);
        Serial.print("sensor: ");
        Serial.print("  /  stan:  ");
      for (int sensor = 1, pin = RELAY_1; sensor <= NUMBER_OF_RELAYS; sensor++, pin++)
        digitalWrite(pin, RELAY_OFF);
        saveState(sensor, state);
      lcd.setCursor(0, 1);
      lcd.print(" TURN ALL ZONES OFF");
      Serial.println(" turn ALL OFF");
      send(msgValve1.set(0) );delay(100);
      send(msgValve2.set(0) );delay(100);
      send(msgValve3.set(0) );delay(100);
      send(msgValve4.set(0) );delay(100);
      send(msgValve5.set(0) );delay(100);
      send(msgValve6.set(0) );delay(100);
      send(msgValve7.set(0) ); 
      send(msgValve1.set(0), true); delay(100);
      send(msgValve2.set(0), true);delay(100);
      send(msgValve3.set(0), true);delay(100);
      send(msgValve4.set(0), true);delay(100);
      send(msgValve5.set(0), true);delay(100);
      send(msgValve6.set(0), true);delay(100);
      send(msgValve7.set(0), true); 
    void ZONE_1()
    { // zone 1, pin 2
      byte pin=RELAY_1;
      state = loadState(CHILD_ID_SPRINKLER1);
      digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);
      saveState(CHILD_ID_SPRINKLER1, state);
      lcd.setCursor(0, 1);
      if (state == 1)
        lcd.setCursor(0, 1);
        lcd.print(" ");
      send(msgValve1.set(state ? false : true), true);
    void ZONE_2()
      byte pin=RELAY_1+1;
      state = loadState(CHILD_ID_SPRINKLER2);
      digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);
      saveState(CHILD_ID_SPRINKLER2, state);
     if (state == 1)
        lcd.setCursor(1, 1);
        lcd.print(" ");
      send(msgValve2.set(state ? false : true), true);
    void ZONE_3()
    byte pin=RELAY_1+2;
      state = loadState(CHILD_ID_SPRINKLER3);
      digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);
      saveState(CHILD_ID_SPRINKLER3, state);
      if (state == 1)
        lcd.setCursor(2, 1);
        lcd.print(" ");
      send(msgValve3.set(state ? false : true), true);
    void ZONE_4() 
    byte pin=RELAY_1+3;
      state = loadState(CHILD_ID_SPRINKLER4);
      digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);
      saveState(CHILD_ID_SPRINKLER4, state);
      if (state == 1)
        lcd.setCursor(3, 1);
        lcd.print(" ");
      send(msgValve4.set(state ? false : true), true);
    void ZONE_5()
    byte pin=RELAY_1+4;
      state = loadState(CHILD_ID_SPRINKLER5);
      digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);
      saveState(CHILD_ID_SPRINKLER5, state);
      if (state == 1)
        lcd.setCursor(4, 1);
        lcd.print(" ");
      send(msgValve5.set(state ? false : true), true);
    void ZONE_6()
    byte pin=RELAY_1+5;
      state = loadState(CHILD_ID_SPRINKLER6);
      digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);
      saveState(CHILD_ID_SPRINKLER6, state);
      if (state == 1)
        lcd.setCursor(5, 1);
        lcd.print(" ");
      send(msgValve6.set(state ? false : true), true);
    void ZONE_7()
    byte pin=RELAY_1+6;
      state = loadState(CHILD_ID_SPRINKLER7);
      digitalWrite(pin, state ? RELAY_ON : RELAY_OFF);
      saveState(CHILD_ID_SPRINKLER7, state);
      if (state == 1)
        lcd.setCursor(6, 1);
        lcd.print(" ");
      send(msgValve7.set(state ? false : true), true);
    void WRONG() {}
    void receive(const MyMessage &message) {
      byte zone;
      if (message.isAck()) {
        Serial.println("This is an ack from gateway");
      // We only expect one type of message from controller. But we better check anyway.
      if (message.type == V_LIGHT) {
        // Change relay state
        digitalWrite(message.sensor - 1 + RELAY_1, message.getBool() ? RELAY_ON : RELAY_OFF);
        zone = message.sensor; // less typing :)
        // Store state in eeprom
        saveState(message.sensor, message.getBool());
        // representing active zones at LCD
        if (message.getBool() == RELAY_ON) // checking new state of relay
          Serial.print("Watering ZONE: "); Serial.println(zone);
          lcd.setCursor(0, 0);
          lcd.print("Watering ZONE: ");
          lcd.setCursor(zone - 1, 1);
        if (message.getBool() == RELAY_OFF) // checking new state of relay
          lcd.setCursor(zone - 1, 1);
          lcd.print(" ");
           // Write some debug info
        Serial.print("Incoming change for ZONE:");
        Serial.print(", New status: ");


  • Hero Member


    What have you used on the hardware side ?

    The OpenSprinkler project is interresting as it is designed to run on arduino with some interresting logic such as EvapoTranspiration or the "Mr Zimmermann" method.

    It would be interresting to have it running on your domotiz platform and connect the remotes valves through mysensors 😉

    //and maintaining grass is more a problem than a solution, too many time and water wasted on it... (not talking of polluants...)

  • @epierre
    Hi there!

    Hardware (main):
    Adruino MEGA256 - Nano and ProMini was to small with memory.
    DS3231 - for RTC and temperature inside the box
    LCD 4x20 I2C
    Power supply 12V & 5V 2A each - part is from my "old" external HDD
    NRF24L01+PA+LNA + Socket Adapter plate Board f 8Pin NRF24L01+
    Keypad 4x4
    DS18 for temp - had DHT11 but mixed + & - and got burned down 😉
    5V 8-Channel Relay Module With Optocoupler Low Level Triger
    24V Transformer with DIN mounting

    The most expensive single part was the BOX 🙂

    I've visited before OpenSprinkler and this is a pretty nice project!

  • Hardware Contributor

    @marekd Great project and thx for the share! Are you sure you can't squeeze the sketch into a Nano or ProMini by using PROGMEM and F-macro? I did it like that in this example.

  • @m26872
    You can squeeze, but I wanted to have more options and not to be limited by memory - anyway at this stage of developing. Because normally you have only one sprinkler controller you can use better uC - I did this way. Playing with more advance programming for memory optimization - is not for me (at this stage of my knowledge) - but thanks for this hint , I might use it in future.

    I was reading your post about 2AA battery node... this is my let's say next step to make.

  • Hero Member

    @marekd said:

    You can squeeze, but I wanted to have more options and not to be limited by memory - anyway at this stage of developing. Because normally you have only one sprinkler controller you can use better uC - I did this way. Playing with more advance programming for memory optimization - is not for me (at this stage of my knowledge) - but thanks for this hint , I might use it in future.

    I was reading your post about 2AA battery node... this is my let's say next step to make.

    on the OsPi hardware, both Arduino/PI (depending on installation) are powered from 24V AC for the sprinkler valves

  • @epierre
    could you explain? I did't understand our thoughts.

  • Hero Member

    @mareked you could power everything only from the 24V AC as they do !

  • @epierre I never thought about it - but you are right! Got some LM7805 and Graetz bride (or 1N4004's)... must think about. I could save some space and additional power supply.
    Thank YOU!

  • @epierre said:

    @mareked you could power everything only from the 24V AC as they do !

    but going form ~22V DC to 5V makes a lot lot lot of heat! any idea how to avoid this issue?

  • Hero Member

    check ospi they have published their BOM

  • @epierre
    power supply unit with LM2596 is rather complicated to build and needs parts which I don't have. I could, of course, buy step down module for around 1-2$. Maybe I'll come back to this solution after this watering season - now is is to late for this. Thanks anyway!

  • Finally I launched my Irrigation System, there are some small bugs in the code, but can live with it - for now. Have plans how to rebuild this in winter time to be more robust and to look better.
    Runs under Domoticz and manually with keypad.
    For now it looks like this:

  • @epierre
    Started to play with LM2596, I've got sth. like this:

    Added diode bridge between transformer and this converter. But my concern is that I've some big voltage peaks the the output of it. It happens when I'm opening/closing valves (AC solenoids) connected to this transformer.
    Set this converter to 12V DC but my readings are sometimes around 20V DC and I am affraid that I could destroy by Arduino.
    Do you (anyone) have any suggestion ?

  • @marekd

    Just wondering, could you not set your zones up as an array. This would reduce the size a little and should also free up memory for variables.

  • @gbgent_nc
    Yes I could and did already because have to use ProMini [my MEGA2560 was killed 😉 ].
    Anyway plan is now to use 2xProMini., one for LCD, Keyboard, relays and second for temperature x2, water meter, rain sensor and relay for pump.

  • @marekd could you give us a link to your walves.

  • @fets
    Manufacturer is RAIN S.p.a Italy,
    Model I use is RN150.
    Got them from Leroy Merlin, price was around 11 EUR.

  • @marekd thanks

  • @marekd Great controller! For the keypad: I see from the code that you use the I2C code. How did you connect your keypad? Did you use a I2C extension chip? And, which keypad_i2c library do you use? I found multiple on the net.