Add WS2812B control, closes #126 (#127)

Author: probonopd

.travis.yml

@@ -28,6 +28,7 @@ install:
   - git clone https://github.com/ayushsharma82/AsyncElegantOTA
   - git clone -o 1c02154 https://github.com/alanswx/ESPAsyncWiFiManager
   - ( git clone -b 6.x https://github.com/bblanchon/ArduinoJson ; cd ArduinoJson ; git reset --hard 3df4efd )
+  - git clone -o 9619fef https://github.com/Makuna/NeoPixelBus # https://github.com/Makuna/NeoPixelBus/issues/275
   - if [[ "$BD" =~ "esp32:esp32:" ]]; then git clone https://github.com/bbx10/Hash_tng ; fi
   - cd -
 

ESP8266WirelessPrintAsync/ESP8266WirelessPrintAsync.ino

@@ -18,6 +18,23 @@
 
 #include "CommandQueue.h"
 
+#include <NeoPixelBus.h>
+
+const uint16_t PixelCount = 20; // this example assumes 4 pixels, making it smaller will cause a failure
+const uint8_t PixelPin = 2;  // make sure to set this to the correct pin, ignored for ESP8266 (there it is GPIO2 = D4)
+#define colorSaturation 255
+RgbColor red(colorSaturation, 0, 0);
+RgbColor green(0, colorSaturation, 0);
+RgbColor blue(0, 0, colorSaturation);
+RgbColor white(colorSaturation);
+RgbColor black(0);
+
+#if defined(ESP8266)
+  NeoPixelBus<NeoGrbFeature, NeoEsp8266Uart1Ws2813Method> strip(PixelCount); // ESP8266 always uses GPIO2 = D4
+#elif defined(ESP32)
+  NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
+#endif
+
 // On ESP8266 use the normal Serial() for now, but name it PrinterSerial for compatibility with ESP32
 // On ESP32, use Serial1 (rather than the normal Serial0 which prints stuff during boot that confuses the printer)
 #ifdef ESP8266
@@ -934,6 +951,18 @@ void ReceiveResponses() {
     serialResponse = "";
     restartSerialTimeout();
   }
+  // this resets all the neopixels to an off state
+  strip.Begin();
+  strip.Show();
+  // strip.SetPixelColor(0, red);
+  // strip.SetPixelColor(1, green);
+  // strip.SetPixelColor(2, blue);
+  // strip.SetPixelColor(3, white);
+  int a;
+  for(a=0; a<PixelCount; a++){
+    strip.SetPixelColor(a, white);
+  }
+  strip.Show(); 
 }