feat:encoder with existing lib (#2)

Co-authored-by: Clement <c.boesmier@aptatio.com>
Reviewed-on: #2

lib/Encoder/examples/TwoKnobs/TwoKnobs.pde

@@ -0,0 +1,46 @@
+/* Encoder Library - TwoKnobs Example
+ * http://www.pjrc.com/teensy/td_libs_Encoder.html
+ *
+ * This example code is in the public domain.
+ */
+
+#include <Encoder.h>
+
+// Change these pin numbers to the pins connected to your encoder.
+//   Best Performance: both pins have interrupt capability
+//   Good Performance: only the first pin has interrupt capability
+//   Low Performance:  neither pin has interrupt capability
+Encoder knobLeft(5, 6);
+Encoder knobRight(7, 8);
+//   avoid using pins with LEDs attached
+
+void setup() {
+  Serial.begin(9600);
+  Serial.println("TwoKnobs Encoder Test:");
+}
+
+long positionLeft  = -999;
+long positionRight = -999;
+
+void loop() {
+  long newLeft, newRight;
+  newLeft = knobLeft.read();
+  newRight = knobRight.read();
+  if (newLeft != positionLeft || newRight != positionRight) {
+    Serial.print("Left = ");
+    Serial.print(newLeft);
+    Serial.print(", Right = ");
+    Serial.print(newRight);
+    Serial.println();
+    positionLeft = newLeft;
+    positionRight = newRight;
+  }
+  // if a character is sent from the serial monitor,
+  // reset both back to zero.
+  if (Serial.available()) {
+    Serial.read();
+    Serial.println("Reset both knobs to zero");
+    knobLeft.write(0);
+    knobRight.write(0);
+  }
+}