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--- en:iot:rgb [2017/09/22 11:44] – Somepub
+++ en:iot:rgb [2020/07/20 12:00] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+<code c>
+#include <Arduino.h>
+#include <ittiot.h>
+#include <Adafruit_NeoPixel.h>
+#define PIN            D2
+// When we setup the NeoPixel library, we tell it how many pixels, and which pin to use to send signals.
+// Note that for older NeoPixel strips you might need to change the third parameter--see the strandtest
+// example for more information on possible values.
+Adafruit_NeoPixel pixels = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);
+// https://stackoverflow.com/questions/9072320/split-string-into-string-array
+String getValue(String data, char separator, int index)
+{
+  int found = 0;
+  int strIndex[] = {0, -1};
+  int maxIndex = data.length()-1;
+  for(int i=0; i<=maxIndex && found<=index; i++)
+  {
+    if(data.charAt(i)==separator || i==maxIndex)
+    {
+        found++;
+        strIndex[0] = strIndex[1]+1;
+        strIndex[1] = (i == maxIndex) ? i+1 : i;
+    }
+  }
+  return found>index ? data.substring(strIndex[0], strIndex[1]) : "";
+}
+// Change RGB LED color
+// mosquitto_pub -u test -P test -t "ITT/IOT/3/rgb" -m "51;255;153"
+void iot_received(String topic, String msg)
+{
+  Serial.print("MSG FROM USER callback, topic: ");
+  Serial.print(topic);
+  Serial.print(" payload: ");
+  Serial.println(msg);
+  String r = getValue(msg,';',0);
+  String g = getValue(msg,';',1);
+  String b = getValue(msg,';',2);
+  Serial.print("R: ");
+  Serial.println(r);
+  Serial.print("G: ");
+  Serial.println(g);
+  Serial.print("B: ");
+  Serial.println(b);
+  pixels.setPixelColor(0, r.toInt(), g.toInt(), b.toInt()); // Moderately bright green color.
+  pixels.show(); // This sends the updated pixel color to the hardware.
+}
+void iot_connected()
+{
+  Serial.println("MQTT connected callback");
+  iot.subscribe("rgb");
+  iot.log("IoT NeoPixel example!");
+}
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println("Booting");
+  iot.printConfig(); // print json config to serial //Peale Serial.begin ja enne iot.setup
+  iot.setup();
+  pixels.begin(); // This initializes the NeoPixel library.
+}
+void loop()
+{
+  iot.handle();
+  delay(200);
+}
+</code>