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--- en:iot:examples:rgb [2017/09/22 11:40] – Somepub
+++ en:iot:examples:rgb [Unknown date] (current) – external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-== RGB Example 1 ==
+======  RGB LED example======
+LED RGB module must be connected to controller module or with sensor module.
+{{:en:iot:examples:rgbpicture1.jpg?200|}}
+{{:en:iot:examples:rgbpicture2.jpg?200|}}
+Needed libraries:
+<code>lib_deps = ITTIoT, Adafruit NeoPixel</code>
+The example code above lights the RGB LED
 <code c>
 #include <Arduino.h>
@@ Line 5: / Line 15: @@
 #include <Adafruit_NeoPixel.h>
+#define MODULE_TOPIC "ESP30/rgb"
+#define WIFI_NAME "name"
+#define WIFI_PASSWORD "password"
+//Stating, to which PIN the RGB LED has been connected
 #define PIN            D2
@@ Line 12: / Line 27: @@
 Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);
+// Splitting string into smaller parts, so that the colour code can be set to the RGB LED
 // https://stackoverflow.com/questions/9072320/split-string-into-string-array
 String getValue(String data, char separator, int index)
@@ Line 28: / Line 44: @@
     }
   }
   return found>index ? data.substring(strIndex[0], strIndex[1]) : "";
 }
-// Change RGB LED color
+// Changes the RGB LED color and send this info to the computer over COM port
 // mosquitto_pub -u test -P test -t "ITT/IOT/3/rgb" -m "51;255;153"
 void iot_received(String topic, String msg)
@@ Line 41: / Line 56: @@
   Serial.println(msg);
-  String r = getValue(msg,';',0);
+  if(topic == MODULE_TOPIC)
-  String g = getValue(msg,';',1);
+  {
-  String b = getValue(msg,';',2);
+    // Splitting the RGB values into smaller parts
+    String r = getValue(msg,';',0);
+    String g = getValue(msg,';',1);
+    String b = getValue(msg,';',2);
-  Serial.print("R: ");
+    Serial.print("R: ");
-  Serial.println(r);
+    Serial.println(r);
-  Serial.print("G: ");
+    Serial.print("G: ");
-  Serial.println(g);
+    Serial.println(g);
-  Serial.print("B: ");
+    Serial.print("B: ");
-  Serial.println(b);
+    Serial.println(b);
-  pixels.setPixelColor(0, r.toInt(), g.toInt(), b.toInt()); // Moderately bright green color.
+    // Sending the color code to the RGB LED
+    pixels.setPixelColor(0, r.toInt(), g.toInt(), b.toInt()); // Moderately bright green color. The 0 number addresses the first RGB LED (is the address number)
-  pixels.show(); // This sends the updated pixel color to the hardware.
+    pixels.show(); // This sends the updated pixel color to the hardware.
+  }
 }
+// Subscrining to a MQTT topic, to get the RGB color code for the RGB LED
 void iot_connected()
 {
   Serial.println("MQTT connected callback");
-  iot.subscribe("rgb");
+  iot.subscribe(MODULE_TOPIC);
   iot.log("IoT NeoPixel example!");
 }
+// Setting up some parameters for the ESP microcontroller
 void setup()
 {
-  Serial.begin(115200);
+  Serial.begin(115200); // setting up serial connection parameter
   Serial.println("Booting");
-  iot.printConfig(); // print json config to serial //Peale Serial.begin ja enne iot.setup
+  //iot.setConfig("wname", WIFI_NAME);
+  //iot.setConfig("wpass", WIFI_PASSWORD);
+  iot.printConfig(); // print json config to serial
   iot.setup();
@@ Line 77: / Line 100: @@
 }
+//Main code, which runs in loop
 void loop()
 {
-  iot.handle();
+  iot.handle(); // Calls iot.handle out
-  delay(200);
+  delay(200); // Delay of 200 ms
 }
 </code>

en/iot/examples/rgb.1506080417.txt.gz · Last modified: 2020/07/20 09:00 (external edit)