CHEERLIGHTS!
For those that don’t know about cheerlights -
CheerLights is an ioBridge Labs project that allows people's lights all across the world to synchronize, stay linked based on social networking trends. It's a way to connect physical things with social networking experiences and spread cheer at the same time.
Cheerlights is used alot around the holidays - I first knew about this 3 or 4 years ago, and it was around Christmas Time - the idea is neat, you post on twitter with a hash tag with “Cheerlights” and a color.
The colors that can be used: “red”, “green”, “blue”, “cyan”, “white”, “warmwhite”, “purple”, “magenta”, “yellow”, “orange”, “pink” and “oldlace” (a type of warmwhite)
of course not all devices can display all colors. or all shades of color. Warm White and White look pretty much the same with my Neopixels.
There a lot of different devices and things that are all using cheerlights. But this is the 1st I’ve seen someone take a ethernet shield, and neopixles -
I based my sketch from this:
and this:
Bkonosky is using something called a Shiftbrite LED, I’ve not heard of these, and it looks like they have been retired from sales, but here is the page I found.
N0hio - (Ham Radio guy) - Is using Neopixles, but he is controlling the Arduino over serial with a Raspberry PI and python script.
For those that don’t know what Neopixels are, NeoPixel is an Adafruit product brand. and are digitally controlled RGB Leds - the Uno can control about 30 or so before you need to use a larger power supply, thou that does depend on how bright you make them, and if they are all turned on at the same time.
Neopixels use 3 wires (4 if you have more then one pixel) They have a 5v VCC, Ground, Data IN and Data Out, if you only have one Pixel you only need 3 wires, nice!
The LEDs have a WS2811 or WS2812 chip built into them - and if you search eBay for WS2812 you’ll find a lot of them cheap from China - You will also find some of the Adafruit products, they are reasonably priced for the most part.
I paid just under 9 dollars for my strip of 30 LEDs.
My code can be found here:
#include <SPI.h>
#include <Ethernet.h>
#include <Adafruit_NeoPixel.h>
// Local Network Settings
byte mac[] = { 0xD4, 0x28, 0xB2, 0xFF, 0x4C, 0x84 }; // Must be unique on local network
#define thingSpeakInterval 16000 // Time interval in milliseconds to get data from ThingSpeak (number of seconds * 1000 = interval)
// Variable Setup
long lastConnectionTime = 0;
String lastCommandString = "black";
boolean lastConnected = false;
int failedCounter = 0;
Adafruit_NeoPixel strip = Adafruit_NeoPixel(10, 6, NEO_GRB + NEO_KHZ800);
// Initialize Arduino Ethernet Client
EthernetClient client;
void setup() {
delay(100);
// Setup Serial
Serial.begin(9600);
delay(100);
Serial.flush();
delay(100);
strip.begin();
strip.show();
// Start Ethernet on Arduino
startEthernet();
}
void loop() {
// Process CheerLights Commands
if(client.available() > 0)
{
delay(100);
Serial.println(client.available());
String response;
char charIn;
do {
charIn = client.read(); // read a char from the buffer
response += charIn; // append that char to the string response
} while (client.available() > 0);
Serial.println(response.length());
Serial.println(response);
if (response.indexOf("white") > 0 || response.indexOf("warmwhite") > 0 || response.indexOf("oldlace") > 0)
{
lastCommandString = "white";
colorWipe(strip.Color(255,255,255),50);
}
else if (response.indexOf("black") > 0 || response.indexOf("off") > 0)
{
lastCommandString = "black";
colorWipe(strip.Color(0,0,0),50);
}
else if (response.indexOf("red") > 0)
{
lastCommandString = "red";
colorWipe(strip.Color(255,0,0),50);
}
else if (response.indexOf("green") > 0)
{
lastCommandString = "green";
colorWipe(strip.Color(0, 255, 0), 50);
}
else if (response.indexOf("blue") > 0)
{
lastCommandString = "blue";
colorWipe(strip.Color(0,0,255),50);
}
else if (response.indexOf("cyan") > 0)
{
lastCommandString = "cyan";
colorWipe(strip.Color(0,255,255),50);
}
else if (response.indexOf("magenta") > 0)
{
lastCommandString = "magenta";
colorWipe(strip.Color(255,0,255),50);
}
else if (response.indexOf("yellow") > 0)
{
lastCommandString = "yellow";
colorWipe(strip.Color(255,255,0),50);
}
else if (response.indexOf("purple") > 0)
{
lastCommandString = "purple";
colorWipe(strip.Color(102,51,204),50);
}
else if (response.indexOf("orange") > 0)
{
lastCommandString = "orange";
colorWipe(strip.Color(255,153,0),50);
}
else if (response.indexOf("pink") > 0)
{
lastCommandString = "pink";
colorWipe(strip.Color(255,53,153),50);
}
/*else if (response.indexOf("warmwhite") > 0)
{
lastCommandString = "warmwhite";
fadeToColor(lastCommand,WARMWHITE,stepdelay);
for (int i = 0; i < 3; i++) {
lastCommand[i] = WARMWHITE[i];
}
}
else if (response.indexOf("black") > 0)
{
lastCommandString = "black";
fadeToColor(lastCommand,BLACK,stepdelay);
for (int i = 0; i < 3; i++) {
lastCommand[i] = BLACK[i];
}
}*/
else
{
lastCommandString = "(no match)";
}
// Echo command
delay(200);
Serial.print("CheerLight Command Received: ");
Serial.println(lastCommandString);
delay(200);
}
// Disconnect from ThingSpeak
if (!client.connected() && lastConnected)
{
Serial.println("...disconnected");
client.stop();
}
// Subscribe to ThingSpeak Channel and Field
if(!client.connected() && (millis() - lastConnectionTime > thingSpeakInterval))
{
subscribeToThingSpeak();
}
// Check if Arduino Ethernet needs to be restarted
if (failedCounter > 3 ) {startEthernet();}
lastConnected = client.connected();
delay(100);
} // End loop
void subscribeToThingSpeak()
{
if (client.connect("api.thingspeak.com", 80))
{
Serial.println("Connecting to ThingSpeak...");
failedCounter = 0;
Serial.println("Sending Request");
client.println("GET /channels/1417/field/1/last.txt HTTP/1.0");
client.println();
lastConnectionTime = millis();
}
else
{
failedCounter++;
Serial.println("Connection to ThingSpeak Failed ("+String(failedCounter, DEC)+")");
Serial.println();
lastConnectionTime = millis();
}
}
void startEthernet()
{
client.stop();
Serial.println("Connecting Arduino to network...");
Serial.println();
delay(1000);
// Connect to network amd obtain an IP address using DHCP
if (Ethernet.begin(mac) == 0)
{
Serial.println("DHCP Failed, reset Arduino to try again");
Serial.println();
}
else
{
Serial.println("Arduino connected to network using DHCP");
Serial.println();
}
delay(1000);
}
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<strip.numPixels(); i++) {
strip.setPixelColor(i, c);
strip.show();
delay(wait);
}
}
I’ll have a video of the Neopixels Cheerlights in action posted shortly.
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