Major update, 2.0

MQTT for messaging, control panel in React.js

.gitignore

@@ -0,0 +1,2 @@
+node_modules/
+config.json

README.md

@@ -20,4 +20,4 @@ Koti Home uses Node.js on a server (I use a [DigitalOcean VPS](https://www.digit
 2. Clone this repository, rename ```example_config.json``` to ```config.json``` and change all the credentials, like email and passwords. Also set your local IP address and the remote URL at ```Arduino/KotiServer.ino```.
 3. Upload the ```Arduino/KotiServer.ino``` to Arduino board and set up the ```koti.js``` app on your server. I recommend [PM2](https://github.com/Unitech/pm2).
 4. Buy a huge chair, a desk and a Darth Vader mask. Make a Margarita and control ~~the planet~~ your house.
-Disclaimer: chair, desk, mask and Margarita are sold separately.
+Disclaimer: chair, desk, mask and Margarita are sold separately.

arduino/koti.ino

@@ -0,0 +1,130 @@
+// analog pins
+int tempPin = A5;
+int luxPin = A4;
+
+// digital pins
+int lightPin = 8;
+int motionPin = 5;
+
+// variables
+String inputString = ""; // a string to hold incoming data
+boolean stringComplete = false;
+boolean lightIsON = false;
+long lastMovement;
+
+// setup
+void setup() {
+  pinMode(tempPin, INPUT);
+  pinMode(luxPin, INPUT);
+  pinMode(lightPin, OUTPUT);
+  pinMode(motionPin, INPUT);
+
+//  inputString.reserve(200);
+  Serial.begin(9600);
+}
+
+// main loop
+void loop() {
+
+    Serial.println("");
+    Serial.print("{");
+    Serial.print("\"temp\": ");
+    Serial.print(getTemp());
+    Serial.print(",");
+
+    Serial.print("\"lux\": ");
+    Serial.print(getLux());
+    Serial.print(",");
+
+    Serial.print("\"motion\": ");
+    Serial.print(getMotion());
+    Serial.print(",");
+
+    Serial.print("\"lightIsOn\": ");
+    Serial.print(lightIsON);
+
+    Serial.print("}");
+
+    //Serial.println("");
+
+    if (stringComplete) {
+      action(inputString);
+      // clear the string:
+      inputString = "";
+      stringComplete = false;
+    }
+
+    delay(1000);
+
+}
+
+// take action based on the command from Serialport 
+void action(String str) {
+//  Serial.println(str);
+
+  if (str == "lightSwitch\n") {
+    lightSwitch();
+  } else if (str == "lightOFF\n") {
+
+  }
+
+}
+
+// get and return current temperature
+int getTemp() {
+  float temp;
+  int analogTemp;
+  analogTemp = analogRead(tempPin);
+
+  // Math magic to convert resistance and voltage into temperature,
+  // and then convert  to Celsius
+  temp = log(((10240000/analogTemp) - 10000));
+  temp = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * temp * temp ))* temp );
+  temp = temp - 273.15;
+  return temp;
+}
+
+// get and return current light
+int getLux() {
+  return analogRead(luxPin);
+}
+
+// turn light on/off
+boolean lightSwitch() {
+  if (!lightIsON) {
+    digitalWrite(lightPin, HIGH);
+    lightIsON = true;
+  } else {
+    digitalWrite(lightPin, LOW);
+    lightIsON = false;
+  }
+  return lightIsON;
+}
+
+// get and return motion
+boolean getMotion() {
+   long now = millis() / 1000;
+
+   if (digitalRead(motionPin) == HIGH && (now - lastMovement) > 6) {
+     lastMovement = now;
+     return true;
+   } else {
+     return false;
+   }
+}
+
+// handle the Serialport communication
+void serialEvent() {
+  while (Serial.available()) {
+
+    // get the new byte, then add it to the inputString:
+    char inChar = (char)Serial.read();
+    inputString += inChar;
+
+    // if the incoming character is a newline, set a flag
+    // so the main loop can do something about it:
+    if (inChar == '\n') {
+      stringComplete = true;
+    }
+  }
+}