Automatic turtle / fish feeder V2

thingiverse

This device feeds your puppy when you're on holiday. It's fully automatic and only needs a new load of food every 2 weeks. The MCU is an Arduino Nano, the stepper is a NEMA 17 with a DRV8825 driver, and the display is a Nokia 5510 type. https://www.youtube.com/watch?v=Kb2TypSXILU Custom Section Arduino Code #include #include #include #include Adafruit_PCD8544 display = Adafruit_PCD8544(5, 4, 3); #define key_left 8 #define key_right 6 #define key_centre 7 #define stepper_enable 14 #define stepper_reset 15 #define stepper_sleep 16 #define stepper_step 17 #define stepper_dir 18 //Display int disp = 0; int token = 0; byte temp_intervall = 0; byte intervall = 0; int erstes_intervall = 0; unsigned long timeout = 0; unsigned long periodic_int = 0; int manuStepps = 10; //EEPROM // Address Store // 0 interval in hours // 1 hours until next feeding unsigned long periodic_EEPROM = 3600000; //First EEPROM write after 1 hour of operation byte hours_till_feed = 0; void setup() { display.begin(); display.setContrast(60); delay(100); display.clearDisplay(); display.println("Dave Feeder"); display.display(); delay(1500); pinMode(key_left, INPUT_PULLUP); pinMode(key_right, INPUT_PULLUP); pinMode(key_centre, INPUT_PULLUP); pinMode(stepper_enable, OUTPUT); pinMode(stepper_reset, OUTPUT); pinMode(stepper_sleep, OUTPUT); pinMode(stepper_step, OUTPUT); pinMode(stepper_dir, OUTPUT); digitalWrite(stepper_reset,HIGH); disableStepper(); //EEPROM read intervall = temp_intervall = EEPROM.read(0); timeout = (EEPROM.read(1)*3600000)+millis(); } void loop() { //Which button? if(!token){ if(!digitalRead(key_left)){ disp =key_left; display.clearDisplay(); display.println("Feeding"); display.display(); token = 1; } else if(!digitalRead(key_right)){ disp =key_right; display.clearDisplay(); display.println("Up Run Down"); display.drawLine(0, 11, 84, 11, BLACK); display.println(" "); display.drawLine(18, 0, 18, 11, BLACK); display.drawLine(46, 0, 46, 11, BLACK); display.println("manual"); display.println("Steps"); display.println("run"); display.display(); token = 1; delay(500); } else if(!digitalRead(key_centre)){ disp =key_centre; display.clearDisplay(); display.println("Up OK Down"); display.drawLine(0, 11, 84, 11, BLACK); display.drawLine(25, 0, 25, 11, BLACK); display.drawLine(46, 0, 46, 11, BLACK); display.println(" "); display.println("SetInterval"); display.display(); token = 1; delay(500); } } //Button function execute switch (disp) { //Feeding execution case key_left: if(token){ enableStepper(); delay(20); for(int i = 0 ; i=periodic_EEPROM && intervall) { periodic_EEPROM = millis()+3600000; hours_till_feed = (byte)(((timeout-millis())/3600000)+0.5); EEPROM.write(0,intervall); EEPROM.write(1,hours_till_feed); } } void enableStepper() { digitalWrite(stepper_enable,LOW); digitalWrite(stepper_sleep,HIGH); //digitalWrite(stepper_reset,HIGH); } void disableStepper() { digitalWrite(stepper_enable,HIGH); digitalWrite(stepper_sleep,LOW); //digitalWrite(stepper_reset,LOW); } void stepDelay() { delayMicroseconds(1000); }