Merge pull request #4 from MecaHumArduino/uv-sensor

Uv sensor

Author: isbkch

.gitignore

@@ -4,10 +4,4 @@
 .vscode/launch.json
 .vscode/ipch
 .DS_Store
-aws/lambdas/weather-station-writer/.serverless
-aws/cfn-templates/real-time-iot-device-monitoring-with-kinesis.template
-cmake-build-uno/
-cmake-build-debug
-CMakeLists.txt
-CMakeListsPrivate.txt
-.idea
+aws/lambdas/weather-station-writer/.serverless

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "cSpell.words": [
+        "guva"
+    ]
+}

src/main.cpp

@@ -5,29 +5,30 @@
   @version 3.0
 */
 
-#include <Arduino.h>
 #include <DHT.h>
-#include <LiquidCrystal.h>
+#include <Arduino.h>
 #include <ArduinoJson.h> // https://github.com/bblanchon/ArduinoJson (use v6.xx)
+#include <LiquidCrystal.h>
 #include <SoftwareSerial.h>
 
 #define DEBUG true
 
 #define DHT_PIN 4 // pin connected to data pin of DHT11
 #define DHT_TYPE DHT11  // Type of the DHT Sensor, DHT11/DHT22
-
-DHT sensor(DHT_PIN, DHT_TYPE);
+int uvAnalogIn = A0;
 
 // initialize the library with the numbers of the interface pins
 LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
 
+DHT temperatureSensor(DHT_PIN, DHT_TYPE);
+
 // ESP TX => Uno Pin 2
 // ESP RX => Uno Pin 3
 SoftwareSerial wifi(2, 3);
 
 // **************
 String sendDataToWiFiBoard(String command, const int timeout, boolean debug);
-String prepareDataForWiFi(float humidity, float temperature, float heatIndex);
+String prepareDataForWiFi(float humidity, float temperature, float heatIndex, float uvIndex);
 void setup();
 void loop();
 // **************
@@ -39,13 +40,14 @@ void loop();
  * @param heatIndex
  * @return
  */
-String prepareDataForWiFi(float humidity, float temperature, float heatIndex)
+String prepareDataForWiFi(float humidity, float temperature, float heatIndex, float uvIndex)
 {
   StaticJsonDocument<200> doc;
 
   doc["humidity"]    = String(humidity);
   doc["temperature"] = String(temperature);
   doc["heat_index"]  = String(heatIndex);
+  doc["uv_index"]    = String(uvIndex);
 
   char jsonBuffer[512];
   serializeJson(doc, jsonBuffer);
@@ -84,6 +86,9 @@ String sendDataToWiFiBoard(String command, const int timeout, boolean debug)
 }
 
 void setup() {
+  // read from GUVA-S12SD
+  pinMode(uvAnalogIn, INPUT);
+
   Serial.begin(9600);
   wifi.begin(9600);
 
@@ -94,10 +99,10 @@ void setup() {
   lcd.setCursor(0, 0);
 
   // display a welcome message
-  lcd.print("Temp & Humidity");
+  lcd.print("Temp, Humidity");
   // go to second line
   lcd.setCursor(0, 1);
-  lcd.print("Sensor");
+  lcd.print("and UV Sensor");
 
   lcd.blink();
   delay(3000);
@@ -124,30 +129,37 @@ void loop() {
     Serial.println(" endbuffer");
   }
 
-  // read from the digital pin
-  sensor.begin();
-
-  float temperature = sensor.readTemperature(); // return temperature in °C
-  float humidity    = sensor.readHumidity(); // return humidity in %
+  // read from DHT11
+  temperatureSensor.begin();
 
+  float temperature = temperatureSensor.readTemperature(); // return temperature in °C
+  float humidity    = temperatureSensor.readHumidity(); // return humidity in %
   // Compute heat index in Celsius (isFahrenheit = false)
-  float heatIndex   = sensor.computeHeatIndex(temperature, humidity, false);
+  float heatIndex   = temperatureSensor.computeHeatIndex(temperature, humidity, false);
+  float uvIndex     = analogRead(uvAnalogIn);
+
+  // integer index, divide by 100!
+  uvIndex /= 100.0;
 
   // check whether reading was successful or not
   if (temperature == NAN || humidity == NAN) { // NAN means no available data
     lcd.print("Reading failed.");
   } else {
     // display Humidity on the LCD screen
     lcd.setCursor(0, 0);
-    lcd.print("Humidity (%): ");
-    lcd.print(String(humidity));
+    lcd.print("Humidity:");
+    lcd.print(String(int(humidity)) + "%  ");
 
     // display Temperature on the LCD screen
     lcd.setCursor(0, 1);
-    lcd.print("Temp (C): ");
-    lcd.print(String(temperature));
+    lcd.print("Temp:");
+    lcd.print(String(int(temperature)) + "C");
+
+    // display UVIndex on the LCD screen
+    lcd.print(" UV:");
+    lcd.print(String(uvIndex));
 
-    String preparedData = prepareDataForWiFi(humidity, temperature, heatIndex);
+    String preparedData = prepareDataForWiFi(humidity, temperature, heatIndex, uvIndex);
     if (DEBUG == true) {
       Serial.println(preparedData);
     }