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A basic demo of Web + Arduino control of an Adafruit Neopixel feather shield
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‎examples/Firebase_ESP8266_Neopixel/.gitignore

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.DS_STORE

‎examples/Firebase_ESP8266_Neopixel/Firebase_ESP8266_Neopixel.ino

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//
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// Copyright 2016 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Firebase_ESP8266-Neopixel is a sample that demonstrates how
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// to set pixel data using a firebase stream.
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#include <Firebase.h>
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#include <ArduinoJson.h>
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#include <Adafruit_NeoPixel.h>
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#include "colors_ext.h"
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#define PIN 13
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Adafruit_NeoPixel strip = Adafruit_NeoPixel(32, PIN, NEO_GRB + NEO_KHZ800);
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// TODO: Replace with your own credentials and keep these safe.
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Firebase fbase = Firebase("brilliant-fire-9638.firebaseio.com")
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.auth("llXzJtqwdiHCHw6F6sehQR2EPwbO0YYdhEjPRZxG");
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void setup() {
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Serial.begin(9600);
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strip.begin();
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strip.setBrightness(25); // 0 ... 255
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strip.show(); // Initialize all pixels to 'off'
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colorWipe(&strip, 0xFF0000, 50);
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// connect to wifi.
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WiFi.begin("GoogleGuest", "");
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Serial.print("connecting");
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int count = 0;
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while (WiFi.status() != WL_CONNECTED) {
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// Draw rainbows while connecting
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Serial.print(".");
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if (count < strip.numPixels()){
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strip.setPixelColor(count++, Wheel(&strip, count * 8));
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strip.show();
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}
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delay(20);
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}
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Serial.println();
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Serial.print("connected: ");
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Serial.println(WiFi.localIP());
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// Connected, set the LEDs green
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colorWipe(&strip, 0x00FF00, 50);
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}
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void loop() {
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// Get all entries.
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// TODO: Replace with streaming
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FirebaseGet get = fbase.get("/rgbdata");
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if (get.error()) {
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Serial.println("Firebase get failed");
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Serial.println(get.error().message());
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return;
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}
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// Use dynamic for large JSON objects
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// DynamicJsonBuffer jsonBuffer;
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StaticJsonBuffer<JSON_OBJECT_SIZE(10*4)> jsonBuffer;
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// create an empty object
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String ref = get.json();
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Serial.println(ref);
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JsonObject& pixelJSON = jsonBuffer.parseObject((char*)ref.c_str());
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if(pixelJSON.success()){
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for (int i=0; i < strip.numPixels(); i++) {
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String pixelAddress = "pixel" + String(i);
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String pixelVal = pixelJSON[pixelAddress];
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Serial.println(pixelVal);
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strip.setPixelColor(i, pixelVal.toInt());
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// Don't do this: it will waste tons of memory due to the way that the
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// Arduino JSON library handles elements.
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/*
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int r = (uint32_t) pixelJSON[pixelAddress]["r"];
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int g = (uint32_t) pixelJSON[pixelAddress]["g"];
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int b = (uint32_t) pixelJSON[pixelAddress]["b"];
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Serial.println("Setting [" + String(i) + "] to {" + String(r) + "," + String(g) + "," + String(b) + "}");
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strip.setPixelColor(i, strip.Color(r, g, b));
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*/
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}
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strip.show();
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} else {
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Serial.println("Parse fail.");
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Serial.println(get.json());
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}
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}
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‎examples/Firebase_ESP8266_Neopixel/colors_ext.h

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// The following methods are extracted from the Adafruit Neopixel example, strandtest.
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// https://github.com/adafruit/Adafruit_NeoPixel
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#ifndef COLORS_EXT_H
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#define COLORS_EXT_H
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// Input a value 0 to 255 to get a color value.
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// The colours are a transition r - g - b - back to r.
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uint32_t Wheel(Adafruit_NeoPixel* strip, byte WheelPos) {
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WheelPos = 255 - WheelPos;
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if(WheelPos < 85) {
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return strip->Color(255 - WheelPos * 3, 0, WheelPos * 3);
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}
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if(WheelPos < 170) {
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WheelPos -= 85;
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return strip->Color(0, WheelPos * 3, 255 - WheelPos * 3);
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}
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WheelPos -= 170;
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return strip->Color(WheelPos * 3, 255 - WheelPos * 3, 0);
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}
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// Fill the dots one after the other with a color
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void colorWipe(Adafruit_NeoPixel* strip, uint32_t c, uint8_t wait) {
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for(uint16_t i=0; i<strip->numPixels(); i++) {
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strip->setPixelColor(i, c);
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strip->show();
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delay(wait);
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}
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}
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void rainbow(Adafruit_NeoPixel* strip, uint8_t wait) {
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uint16_t i, j;
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for(j=0; j<256; j++) {
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for(i=0; i<strip->numPixels(); i++) {
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strip->setPixelColor(i, Wheel(strip, (i+j) & 255));
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}
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strip->show();
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delay(wait);
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}
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}
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// Slightly different, this makes the rainbow equally distributed throughout
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void rainbowCycle(Adafruit_NeoPixel* strip, uint8_t wait) {
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uint16_t i, j;
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for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
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for(i=0; i< strip->numPixels(); i++) {
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strip->setPixelColor(i, Wheel(strip, ((i * 256 / strip->numPixels()) + j) & 255));
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}
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strip->show();
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delay(wait);
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}
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}
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//Theatre-style crawling lights.
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void theaterChase(Adafruit_NeoPixel* strip, uint32_t c, uint8_t wait) {
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for (int j=0; j<10; j++) { //do 10 cycles of chasing
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for (int q=0; q < 3; q++) {
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for (int i=0; i < strip->numPixels(); i=i+3) {
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strip->setPixelColor(i+q, c); //turn every third pixel on
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}
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strip->show();
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delay(wait);
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for (int i=0; i < strip->numPixels(); i=i+3) {
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strip->setPixelColor(i+q, 0); //turn every third pixel off
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}
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}
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}
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}
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//Theatre-style crawling lights with rainbow effect
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void theaterChaseRainbow(Adafruit_NeoPixel* strip, uint8_t wait) {
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for (int j=0; j < 256; j++) { // cycle all 256 colors in the wheel
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for (int q=0; q < 3; q++) {
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for (int i=0; i < strip->numPixels(); i=i+3) {
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strip->setPixelColor(i+q, Wheel(strip, (i+j) % 255)); //turn every third pixel on
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}
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strip->show();
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delay(wait);
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for (int i=0; i < strip->numPixels(); i=i+3) {
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strip->setPixelColor(i+q, 0); //turn every third pixel off
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}
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}
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}
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}
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#endif

‎examples/Firebase_ESP8266_Neopixel/web/.gitignore

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bower_components/
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node_modules/

‎examples/Firebase_ESP8266_Neopixel/web/bower.json

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{
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"name": "web",
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"homepage": "https://github.com/gguuss/firebase-arduino",
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"authors": [
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"Gus Class <gguuss@gmail.com>"
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],
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"description": "",
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"main": "",
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"moduleType": [],
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"license": "MIT",
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"private": true,
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"ignore": [
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"**/.*",
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"node_modules",
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"bower_components",
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"test",
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"tests"
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],
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"dependencies": {
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"polymer": "^1.2.0",
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"polymer-color-picker": "^1.0.1"
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}
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}

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