Prawnbot

Prawnbot.ino

bool debug = FALSE;
bool disableMotor = FALSE;

bool motorJammed = FALSE;
int motorPin = D5;
int switchPin = D2;
int ledPin = D7;
int dispense(String command);
int dispenseTimeout = 2000;
int debounce = 50;
long dispenseStartTime;

#pragma GCC diagnostic ignored "-Wunused-variable"

void setup() {
    Spark.function("Dispense", dispense);
    pinMode(switchPin, INPUT_PULLUP);
    pinMode(motorPin, OUTPUT);
    pinMode(ledPin, OUTPUT);
    
    if(!debug) {
        while (digitalRead(switchPin)==HIGH) {
            dispenseStartTime = millis();
            advanceMotor(millis(), debounce);
            if (millis() > dispenseStartTime + dispenseTimeout) {
                jam();
                break;
            };
        };
        if (!disableMotor) digitalWrite(motorPin, LOW);
    };
}

void loop() {
    digitalWrite(ledPin, digitalRead(switchPin));
}

int dispense(String command) {
    if (!motorJammed) {
        if(!debug) {
            dispenseStartTime = millis();
            while (digitalRead(switchPin)==LOW){ // initial movement to get past switch point
                advanceMotor(millis(), debounce);
                if (millis() > dispenseStartTime + dispenseTimeout) {
                    jam();
                    return 1;
                    break;
                };
            };
            while (digitalRead(switchPin)==HIGH){ // Moving motor to end point
                advanceMotor(millis(), debounce);
                if (millis() > dispenseStartTime + dispenseTimeout) {
                    jam();
                    return 1;
                    break;
                };
            };
            if (!disableMotor) digitalWrite(motorPin, LOW);
        };
        Spark.publish("doggies_fed","fed");
        return 1;
    }
}

void advanceMotor(long startTime, int runTime) {
    while (millis() < startTime + runTime) if (!disableMotor) digitalWrite(motorPin, HIGH);
}

void jam() {
    if (!disableMotor) digitalWrite(motorPin, LOW);
    Spark.publish("doggies_fed","jam");
    motorJammed = TRUE;
}

Cat feeder for Spark Core. Triggered/notifications via IFTTT.