farmMinder

#define DEBUG // Comment this out to disable prints and save space
#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <Adafruit_NeoPixel.h>
#include "SparkFunHTU21D.h"

////////////////////
// Blynk Settings //
////////////////////
char BlynkAuth[] = "yourBlynkAuthCodeHere";
char WiFiNetwork[] = "yourSSID";
char WiFiPassword[] = "yourWiFiPassword";
char emailAddress[] = "yourEmail@server";

///////////////////////
// Hardware Settings //
///////////////////////
#define WS2812_PIN 4 // Pin connected to WS2812 LED
#define BUTTON_PIN 0
#define LED_PIN    5
Adafruit_NeoPixel rgb = Adafruit_NeoPixel(1, WS2812_PIN, NEO_GRB + NEO_KHZ800);
#define MOTION_DETECT_PIN 12
#define SNAKE_PIN 5
#define SOIL_PIN A0
HTU21D thSense;

// Virtual pins
#define TEMP V9
#define HUMID V10
#define SOIL V11
#define SOIL_LIMIT V12
#define SNAKE_TEST V13
#define SNAKE_ARM V14

// Globals
uint32_t lastPush = 0;
boolean motion = false;
float tempF = 0;
float humidity = 0;
int soil = 0;
int soilLimit = 0;
uint32_t lastSnake = 0;
boolean snakeArmed = false;
boolean soilAlertSent = false;

BLYNK_READ(TEMP) {
  Blynk.virtualWrite(TEMP, tempF); // Update Blynk virtual value
}

BLYNK_READ(HUMID) {
  Blynk.virtualWrite(HUMID, humidity); // Update Blynk virtual value
}

BLYNK_READ(SOIL) {
  Blynk.virtualWrite(SOIL, soil);
}

BLYNK_READ(SNAKE_ARM) {
  Blynk.virtualWrite(SNAKE_ARM, snakeArmed);
}

BLYNK_WRITE(SNAKE_ARM) {
  snakeArmed = param.asInt();
}

BLYNK_READ(SOIL_LIMIT) {
  Blynk.virtualWrite(SOIL_LIMIT, soilLimit);
}

BLYNK_WRITE(SOIL_LIMIT) {
  soilLimit = param.asInt();
}

BLYNK_WRITE(SNAKE_TEST) {
  digitalWrite(SNAKE_PIN, HIGH);
  delay(500);
  digitalWrite(SNAKE_PIN, LOW);
}

void setup()
{
  // Initialize hardware
#ifdef DEBUG
  Serial.begin(9600); // Serial for debugging
#endif
  rgb.begin(); // RGB LED
  pinMode(SOIL_PIN, INPUT);
  pinMode(MOTION_DETECT_PIN, INPUT);
  pinMode(SNAKE_PIN, OUTPUT);
  digitalWrite(SNAKE_PIN, LOW);
  thSense.begin();
  // Initialize Blynk
  Blynk.begin(BlynkAuth, WiFiNetwork, WiFiPassword);
}

void loop()
{
  // Execute Blynk.run() as often as possible during the loop
  Blynk.run();
  motion = digitalRead(MOTION_DETECT_PIN);
  float tempC = thSense.readTemperature(); // Read from the temperature sensor
  tempF = tempC * 9.0 / 5.0 + 32.0; // Convert to farenheit
  humidity = thSense.readHumidity(); // Read from humidity sensor
  soil = analogRead(A0);

  // See if we need to send an email alert re: soil moisture
  if (soil < soilLimit) {
    if (soilAlertSent == false) { // only send if we haven't already
      Blynk.email(emailAddress, "Low soil moisture.", "Soil moisture has fallen below your chosen threshold.\nThanks,\nfarmMinder");
      soilAlertSent = true;
    }
  }
  else {
    soilAlertSent = false; // reset the alert flag if the soil has been watered
  }

  // See if we need to move the snake
  if (motion && snakeArmed) {
    if (millis() - lastSnake > 10000) { // max out at one snake rattle per 10 seconds
      lastSnake = millis();
      digitalWrite(SNAKE_PIN, HIGH);
      delay(500);
      digitalWrite(SNAKE_PIN, LOW);
    }
  }

  // Force a push if we haven't had one for a minute
  if (millis() - lastPush > 60000 || millis() < lastPush) {
    lastPush = millis();
    Blynk.virtualWrite(TEMP, tempF); // Update Blynk virtual value
    Blynk.virtualWrite(HUMID, humidity); // Update Blynk virtual value
    Blynk.virtualWrite(SOIL, soil);
  }

  // For debugging:
#ifdef DEBUG
  Serial.print(" motion: ");
  Serial.print(motion ? "Yes" : "No ");
  Serial.print(" humidity: ");
  Serial.print(humidity);
  Serial.print(" temp: ");
  Serial.print(tempF);
  Serial.print(" soil: ");
  Serial.print(soil);
  Serial.print(" soilLimit: ");
  Serial.print(soilLimit);
  Serial.print(" soilAlertSent: ");
  Serial.println(soilAlertSent ? "Yes" : "No ");
#endif
}