added water level sensor

Arduino/CanGrow/CanGrow.ino

@@ -7,8 +7,18 @@
  * D0      - MOSFET Fan
  * D1, D2  - I2C
  * D3      - DHT11
- * D4      - MOSFET Pump
+ * D4      - water level Vcc
  * D5      - MOSFET Grow LED, PWM
+ * D6      - MOSFET Pump
+ * A0      - water level
+ * 
+ * 
+ * Water level
+ * ===========
+ * 
+ * 0 - 199   : CRITICAL
+ * 200 - 399 : WARNING
+ * >400      : OK
  * 
  */
 
@@ -19,16 +29,16 @@
 #include <Adafruit_SSD1306.h>
 #include "DHT.h"
 
+uint8_t PINfan = D0;
 uint8_t PINdht = D3;
-uint8_t PINfan = 3;
+uint8_t PINwater = D4;
-uint8_t PINpump = 4;
+uint8_t PINled = D5;
-uint8_t PINled = 5;
+uint8_t PINpump = D6;
+uint8_t PINAwater = A0;
 
 #define WIRE Wire
 #define DHTTYPE DHT11
 
-
-
 Adafruit_SSD1306 display = Adafruit_SSD1306(128, 32, &WIRE);
 // 'CanGrow_Logo', 128x32px
 const unsigned char bmpCanGrow_Logo [] PROGMEM = {
@@ -72,7 +82,6 @@ const unsigned char* bmpallArray[1] = {
   bmpCanGrow_Logo
 };
 
-
 // I2C moisture sensor measurements
 // soil moisture value
 int chirpMoisture; 
@@ -108,26 +117,47 @@ unsigned int readI2CRegister16bit(int addr, int reg) {
 }
 
 void setup() {
+  // setup pins
+  pinMode(PINfan, OUTPUT);
+  pinMode(PINdht, INPUT);
+  pinMode(PINwater, OUTPUT);  
+  pinMode(PINled, OUTPUT);
+  pinMode(PINpump, OUTPUT);
+  
+  // set all OUTPUT to low
+  digitalWrite(PINfan, LOW);
+  digitalWrite(PINwater, LOW);
+  digitalWrite(PINled, LOW);
+  digitalWrite(PINpump, LOW);
+  
+  
+  // initialise Wire for I2C
   Wire.begin();
+  // initialise Serial output
   Serial.begin(115200);
+  // reset chirp
   writeI2CRegister8bit(0x20, 6); //reset
+  // initialise I2C display
   display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // Address 0x3C for 128x32
 
-  pinMode(PINdht, INPUT);
+  // initialise DHT11
   dht.begin();
   
   display.clearDisplay();
   display.display();
 
+  // set display settings
+  display.setTextSize(1);
+  display.setTextColor(SSD1306_WHITE, SSD1306_BLACK);
+  
+  // display Logo
   display.drawBitmap(0, 0, bmpCanGrow_Logo, 128, 32, WHITE);
   display.display();
   delay(2500);
-
+  // clear display
   display.clearDisplay();
   display.display();
   
-  display.setTextSize(1);
-  display.setTextColor(SSD1306_WHITE, SSD1306_BLACK);
 }
 
 void loop() {
@@ -173,8 +203,17 @@ void loop() {
   display.print(dht.readTemperature());
   display.print(", ");
   display.print(dht.readHumidity());
-  //display.println(readI2CRegister16bit(0x20, 0));
+  display.println(readI2CRegister16bit(0x20, 0));
   display.display();
 
-  delay(500);
+
+  digitalWrite(PINwater, HIGH);
+  delay(200);
+  display.print("Water: ");
+  display.println(analogRead(PINAwater));
+  
+  digitalWrite(PINwater, LOW);
+
+  display.display();
+  
 }