non blocking led animation

hoverserial.ino

@@ -28,7 +28,7 @@ Nunchuk nchuk(Wire2);
 
 // ########################## DEFINES ##########################
 #define LED_BUILTIN PC13
-#define TIME_SEND 20            // [ms] poolling time interval
+#define TIME_SEND 100           // [ms] time interval
 #define HOVER_SERIAL_BAUD 38400 // [-] Baud rate for HoverSerial (used to communicate with the hoverboard)
 #define START_FRAME 0xAAAA      // [-] Start frme definition for reliable serial communication
 #define SCREEN_WIDTH 128        // OLED display width, in pixels
@@ -109,7 +109,8 @@ void setup()
   Serial1.begin(HOVER_SERIAL_BAUD);
 
   strip.begin(); // INITIALIZE NeoPixel strip object
-  strip.show();  // Turn OFF all pixels ASAP
+  strip.clear();
+  strip.show();            // Turn OFF all pixels ASAP
   strip.setBrightness(50); // Set BRIGHTNESS to about 1/5 (max = 255)
 
   while (!Serial)
@@ -280,13 +281,29 @@ void Nunchuk_control()
 // ########################## LOOP ##########################
 
 unsigned long iTimeSend = 0;
+int idx_led = 0;
 
 void loop()
 {
   unsigned long timeNow = millis();
+
   // Blink the LED
   digitalWrite(LED_BUILTIN, (timeNow % 2000) < 1000);
   Receive();
   Nunchuk_control();
-  Serial.println(timeNow);
+
+  if (iTimeSend > timeNow)
+    return;
+  iTimeSend = timeNow + TIME_SEND;
+  strip.clear();
+  strip.setPixelColor(idx_led, strip.Color(128, 0, 0));
+  if (idx_led < strip.numPixels() -1 )
+  {
+    idx_led++;
+  }
+  else
+  {
+    idx_led = 0;
+  }
+  strip.show();
 }