gistfile1.txt

#include <FastLED.h>

#define CHECK_TIME 2000
#define PUMP_1 D7
#define PUMP_2 D6
#define PUMP_3 D5
#define PUMP_4 D0
#define LED    D4
#define SOIL_SENSOR_INPUT A0
#define SOIL_SENSOR_1 D2
#define SOIL_SENSOR_2 D3
#define NUM_LEDS 4
#define BRIGHTNESS 32
#define PUMP_ON HIGH
#define PUMP_OFF LOW
#define MOISTURE_LIMIT 300

unsigned int lastMillis = 0;
unsigned int lastSoilMillis = 0;

int pumps = 4;
bool pumpState[] = { LOW, LOW, LOW, LOW };
char pumpPin[] = { PUMP_1, PUMP_2, PUMP_3, PUMP_4 };
int sensors = 2;
char sensorPin[] = { SOIL_SENSOR_1, SOIL_SENSOR_2 };
int soilMoisture[] = { 0, 0 };

CRGB leds[NUM_LEDS];

void setup() {
  Serial.begin(9600); // open serial port, set the baud rate as 9600 bps
  Serial.println("Init");
  pinMode(PUMP_1, OUTPUT);
  pinMode(PUMP_2, OUTPUT);
  pinMode(PUMP_3, OUTPUT);
  pinMode(PUMP_4, OUTPUT);
  pinMode(SOIL_SENSOR_1, OUTPUT);
  pinMode(SOIL_SENSOR_2, OUTPUT);
  // set sensor pins low.
  digitalWrite(SOIL_SENSOR_1, LOW);
  digitalWrite(SOIL_SENSOR_2, LOW);
  for (int i = 0; i < pumps; i++) {
    change_pump_state(i);
  }
  FastLED.addLeds<WS2812B, LED, GRB>(leds, NUM_LEDS);
  FastLED.setBrightness(BRIGHTNESS); 
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CRGB::Black;
  }
  FastLED.show();
  delay(1000); //give it a second
}
void loop() {
  unsigned long currentMillis  = millis();
  
  if (currentMillis - lastSoilMillis > CHECK_TIME) {
    for (int i = 0; i < sensors; i++) {
      soilMoisture[i] = check_soil_moisture(i);
    }
    lastSoilMillis = currentMillis;
  }
  for (int i = 0; i < sensors; i++) {
    if (soilMoisture[i] <= MOISTURE_LIMIT && pumpState[i] == PUMP_OFF) {
      change_pump_state(i);
    }
    if (soilMoisture[i]  > MOISTURE_LIMIT && pumpState[i] == PUMP_ON) {
      change_pump_state(i);
    }
  }
  FastLED.show();
}

int check_soil_moisture(int sensor) {
  digitalWrite(sensorPin[sensor], HIGH);
  delay(20); //let the thing power on
  int value = analogRead(SOIL_SENSOR_INPUT);
  digitalWrite(sensorPin[sensor], LOW);
  delay(20   ); //let the thing clear
  return value;
}

void change_pump_state(int pump) {
  pumpState[pump] = !pumpState[pump];
  digitalWrite(pumpPin[pump], pumpState[pump]);
  if (pumpState[pump] == PUMP_ON) {
    leds[pump] = CRGB::White;
  } else {
    leds[pump] = CRGB::Red;
  }
  FastLED.show();
}