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BitcoinTracker.ino
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BitcoinTracker.ino
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#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <algorithm>
#include <string>
#include <MD_MAX72xx.h>
#include <SPI.h>
#include "FastLED.h"
#include <LedControl.h>
#include <ArduinoJson.h>
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
#define NUM_PANELS 4
#define CLK_PIN D5
#define DATA_PIN D7
#define CS_PIN D4
#define CHAR_SPACING 1
#define BUF_SIZE 75
#define NUM_LEDS 30 // # of LEDS in the strip
#define LED_DATA 3 // Output Pin to Data Line on Strip
int SCROLL_SPEED = 10; // Will want to change this for different messages.
int brightness = 0;
int fadeAmount = 5;
unsigned long timestamp=0;
unsigned long interval=80;
const char* ssid = "yourssid";
const char* password = "yourpwd";
double curr_price = -1.0;
unsigned long bufferLong[14] = {0};
unsigned char connectText[] PROGMEM ={"Connecting..."};
unsigned char emptySpace[] PROGMEM = {" "};
unsigned char connectedText[] PROGMEM ={"Connected! "};
unsigned char errorParsing[] PROGMEM ={"Error parsing JSON object."};
unsigned char tickerText[100] ={""};
MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, NUM_PANELS);
CRGB leds[NUM_LEDS];
LedControl lc = LedControl(D7, D5, D4, NUM_PANELS);
DynamicJsonBuffer jsonBuffer;
void loop() {
if (WiFi.status() == WL_CONNECTED) { //Check WiFi connection status
HTTPClient http; //Declare an object of class HTTPClient
http.begin("http://btcprice-lyons.herokuapp.com/ticker"); //Specify request destination
int httpCode = http.GET(); //Send the request
if (httpCode > 0) { //Check the returning code
String responseString = http.getString(); //Get the request response payload
JsonArray& root = jsonBuffer.parseArray(responseString);
// Test if parsing succeeds.
if (!root.success()) {
scrollMessage(errorParsing);
return;
}
//Just hardcode instead of looping for now.
String btcPrice = root[0]["level"];
String sp500level = root[1]["level"];
String sp500valueChange = root[1]["value_change"];
String sp500percentChange = root[1]["percent_change"];
String sp500color = root[1]["color"];
String nasdaqLevel = root[2]["level"];
String nasdaqValueChange = root[2]["value_change"];
String nasdaqPercentChange = root[2]["percent_change"];
String nasdaqColor = root[2]["color"];
String dowLevel = root[3]["level"];
String dowValueChange = root[3]["value_change"];
String dowPercentChange = root[3]["percent_change"];
String dowColor = root[3]["color"];
//S&P500 data parsing
String sp500readout = "S&P 500 FUTURES " + sp500level + " (" + sp500valueChange + " / " + sp500percentChange + ")";
clearBuffer();
for(int i = 0; i < sp500readout.length(); i++) {
tickerText[i] = sp500readout[i];
}
scrollMessage(emptySpace);
scrollMessage(tickerText);
if(sp500color == "red") {
setRed();
} else {
setGreen();
}
//Nasdaq data parsing
String nasdaqReadout = "NASDAQ FUTURES " + nasdaqLevel + " (" + nasdaqValueChange + " / " + nasdaqPercentChange + ")";
clearBuffer();
for(int i = 0; i < nasdaqReadout.length(); i++) {
tickerText[i] = nasdaqReadout[i];
}
scrollMessage(emptySpace);
scrollMessage(tickerText);
if(nasdaqColor == "red") {
setRed();
} else {
setGreen();
}
//Dow data parsing
String dowReadout = "DJI FUTURES " + dowLevel + " (" + dowValueChange + " / " + dowPercentChange + ")";
clearBuffer();
for(int i = 0; i < dowReadout.length(); i++) {
tickerText[i] = dowReadout[i];
}
scrollMessage(emptySpace);
scrollMessage(tickerText);
if(dowColor == "red") {
setRed();
} else {
setGreen();
}
//BTC/USD data parsing
String btcPriceIsolated = btcPrice;
btcPriceIsolated.replace(",", "");
double btcPriceDouble = btcPriceIsolated.toDouble();
String btcPriceReadout = "BTC/USD $" + btcPrice;
clearBuffer();
for(int i = 0; i < btcPriceReadout.length(); i++) {
tickerText[i] = btcPriceReadout[i];
}
scrollMessage(emptySpace);
scrollMessage(tickerText);
//BTC price color change will just refer to changes from last read
if(btcPriceDouble > curr_price) {
setGreen();
} else if (btcPriceDouble < curr_price) {
setRed();
}
curr_price = btcPriceDouble;
}
http.end(); //Close connection
}
}
void clearBuffer() {
for(int i = 0; i < 100; i++) {
tickerText[i] = (char) 0;
}
}
void setup () {
for (int x = 0; x < NUM_PANELS; x++) {
lc.shutdown(x,false); //The MAX72XX is in power-saving mode on startup
lc.setIntensity(x,8); // Set the brightness to default value
lc.clearDisplay(x); // and clear the display
}
FastLED.addLeds<NEOPIXEL, LED_DATA>(leds, NUM_LEDS);
scrollMessage(connectText);
WiFi.begin(ssid, password);
setWhite();
while (WiFi.status() != WL_CONNECTED) {
for(int i = 0; i < NUM_LEDS; i++ ) {
leds[i].setRGB(255, 255, 255); // Set Color HERE!!!
leds[i].fadeLightBy(brightness);
}
FastLED.show();
brightness = brightness + fadeAmount;
if(brightness == 0 || brightness == 255) {
fadeAmount = -fadeAmount ;
}
delay(9);
}
scrollMessage(emptySpace);
scrollMessage(connectedText);
delay(3000);
SCROLL_SPEED = 25;
}
void clearMXPanels() {
for (int x = 0; x < NUM_PANELS; x++) {
lc.clearDisplay(x); // and clear the display
}
}
void printText(uint8_t modStart, uint8_t modEnd, char *pMsg) {
uint8_t state = 0;
uint8_t curLen;
uint16_t showLen;
uint8_t cBuf[8];
int16_t col = ((modEnd + 1) * COL_SIZE) - 1;
mx.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::OFF);
do // finite state machine to print the characters in the space available
{
switch(state)
{
case 0: // Load the next character from the font table
// if we reached end of message, reset the message pointer
if (*pMsg == '\0')
{
showLen = col - (modEnd * COL_SIZE); // padding characters
state = 2;
break;
}
// retrieve the next character form the font file
showLen = mx.getChar(*pMsg++, sizeof(cBuf)/sizeof(cBuf[0]), cBuf);
curLen = 0;
state++;
// !! deliberately fall through to next state to start displaying
case 1: // display the next part of the character
mx.setColumn(col--, cBuf[curLen++]);
// done with font character, now display the space between chars
if (curLen == showLen)
{
showLen = CHAR_SPACING;
state = 2;
}
break;
case 2: // initialize state for displaying empty columns
curLen = 0;
state++;
// fall through
case 3: // display inter-character spacing or end of message padding (blank columns)
mx.setColumn(col--, 0);
curLen++;
if (curLen == showLen)
state = 0;
break;
default:
col = -1; // this definitely ends the do loop
}
} while (col >= (modStart * COL_SIZE));
mx.control(modStart, modEnd, MD_MAX72XX::UPDATE, MD_MAX72XX::ON);
}
void setGreen() {
int brightness = 255;
while (brightness > 0) {
for(int i = 0; i < NUM_LEDS; i++ ) {
leds[i].setRGB(0, 255, 0); // Set Color HERE!!!
leds[i].fadeLightBy(brightness);
}
FastLED.show();
brightness = brightness - 25;
delay(20);
}
}
void setWhite() {
for(int i = 0; i < NUM_LEDS; i++ ) {
leds[i].setRGB(255, 255, 255);
}
FastLED.show();
}
void setRed() {
int brightness = 255;
while (brightness > 0) {
for(int i = 0; i < NUM_LEDS; i++ ) {
leds[i].setRGB(255, 0, 0); // Set Color HERE!!!
leds[i].fadeLightBy(brightness);
}
FastLED.show();
brightness = brightness - 25;
delay(20);
}
}
// Scrolling text stuff. Not sure what any of this is but it works.
const unsigned char font5x7 [] PROGMEM = { //Numeric Font Matrix (Arranged as 7x font data + 1x kerning data)
B00000000, //Space (Char 0x20)
B00000000,
B00000000,
B00000000,
B00000000,
B00000000,
B00000000,
3,//cambias el tamaño del espacio entre letras
B01000000, //!
B01000000,
B01000000,
B01000000,
B01000000,
B00000000,
B01000000,
2,
B10100000, //"
B10100000,
B10100000,
B00000000,
B00000000,
B00000000,
B00000000,
4,
B01010000, //#
B01010000,
B11111000,
B01010000,
B11111000,
B01010000,
B01010000,
6,
B00100000, //$
B01111000,
B10100000,
B01110000,
B00101000,
B11110000,
B00100000,
6,
B11000000, //%
B11001000,
B00010000,
B00100000,
B01000000,
B10011000,
B00011000,
6,
B01100000, //&
B10010000,
B10100000,
B01000000,
B10101000,
B10010000,
B01101000,
6,
B11000000, //'
B01000000,
B10000000,
B00000000,
B00000000,
B00000000,
B00000000,
3,
B00100000, //(
B01000000,
B10000000,
B10000000,
B10000000,
B01000000,
B00100000,
4,
B10000000, //)
B01000000,
B00100000,
B00100000,
B00100000,
B01000000,
B10000000,
4,
B00000000, //*
B00100000,
B10101000,
B01110000,
B10101000,
B00100000,
B00000000,
6,
B00000000, //+
B00100000,
B00100000,
B11111000,
B00100000,
B00100000,
B00000000,
6,
B00000000, //,
B00000000,
B00000000,
B00000000,
B11000000,
B01000000,
B10000000,
3,
B00000000, //-
B00000000,
B11111000,
B00000000,
B00000000,
B00000000,
B00000000,
6,
B00000000, //.
B00000000,
B00000000,
B00000000,
B00000000,
B11000000,
B11000000,
3,
B00000000, ///
B00001000,
B00010000,
B00100000,
B01000000,
B10000000,
B00000000,
6,
B01110000, //0
B10001000,
B10011000,
B10101000,
B11001000,
B10001000,
B01110000,
6,
B01000000, //1
B11000000,
B01000000,
B01000000,
B01000000,
B01000000,
B11100000,
4,
B01110000, //2
B10001000,
B00001000,
B00010000,
B00100000,
B01000000,
B11111000,
6,
B11111000, //3
B00010000,
B00100000,
B00010000,
B00001000,
B10001000,
B01110000,
6,
B00010000, //4
B00110000,
B01010000,
B10010000,
B11111000,
B00010000,
B00010000,
6,
B11111000, //5
B10000000,
B11110000,
B00001000,
B00001000,
B10001000,
B01110000,
6,
B00110000, //6
B01000000,
B10000000,
B11110000,
B10001000,
B10001000,
B01110000,
6,
B11111000, //7
B10001000,
B00001000,
B00010000,
B00100000,
B00100000,
B00100000,
6,
B01110000, //8
B10001000,
B10001000,
B01110000,
B10001000,
B10001000,
B01110000,
6,
B01110000, //9
B10001000,
B10001000,
B01111000,
B00001000,
B00010000,
B01100000,
6,
B00000000, //:
B11000000,
B11000000,
B00000000,
B11000000,
B11000000,
B00000000,
3,
B00000000, //;
B11000000,
B11000000,
B00000000,
B11000000,
B01000000,
B10000000,
3,
B00010000, //<
B00100000,
B01000000,
B10000000,
B01000000,
B00100000,
B00010000,
5,
B00000000, //=
B00000000,
B11111000,
B00000000,
B11111000,
B00000000,
B00000000,
6,
B10000000, //>
B01000000,
B00100000,
B00010000,
B00100000,
B01000000,
B10000000,
5,
B01110000, //?
B10001000,
B00001000,
B00010000,
B00100000,
B00000000,
B00100000,
6,
B01110000, //@
B10001000,
B00001000,
B01101000,
B10101000,
B10101000,
B01110000,
6,
B01110000, //A
B10001000,
B10001000,
B10001000,
B11111000,
B10001000,
B10001000,
6,
B11110000, //B
B10001000,
B10001000,
B11110000,
B10001000,
B10001000,
B11110000,
6,
B01110000, //C
B10001000,
B10000000,
B10000000,
B10000000,
B10001000,
B01110000,
6,
B11100000, //D
B10010000,
B10001000,
B10001000,
B10001000,
B10010000,
B11100000,
6,
B11111000, //E
B10000000,
B10000000,
B11110000,
B10000000,
B10000000,
B11111000,
6,
B11111000, //F
B10000000,
B10000000,
B11110000,
B10000000,
B10000000,
B10000000,
6,
B01110000, //G
B10001000,
B10000000,
B10111000,
B10001000,
B10001000,
B01111000,
6,
B10001000, //H
B10001000,
B10001000,
B11111000,
B10001000,
B10001000,
B10001000,
6,
B11100000, //I
B01000000,
B01000000,
B01000000,
B01000000,
B01000000,
B11100000,
4,
B00111000, //J
B00010000,
B00010000,
B00010000,
B00010000,
B10010000,
B01100000,
6,
B10001000, //K
B10010000,
B10100000,
B11000000,
B10100000,
B10010000,
B10001000,
6,
B10000000, //L
B10000000,
B10000000,
B10000000,
B10000000,
B10000000,
B11111000,
6,
B10001000, //M
B11011000,
B10101000,
B10101000,
B10001000,
B10001000,
B10001000,
6,
B10001000, //N
B10001000,
B11001000,
B10101000,
B10011000,
B10001000,
B10001000,
6,
B01110000, //O
B10001000,
B10001000,
B10001000,
B10001000,
B10001000,
B01110000,
6,
B11110000, //P
B10001000,
B10001000,
B11110000,
B10000000,
B10000000,
B10000000,
6,
B01110000, //Q
B10001000,
B10001000,
B10001000,
B10101000,
B10010000,
B01101000,
6,
B11110000, //R
B10001000,
B10001000,
B11110000,
B10100000,
B10010000,
B10001000,
6,
B01111000, //S
B10000000,
B10000000,
B01110000,
B00001000,
B00001000,
B11110000,
6,
B11111000, //T
B00100000,
B00100000,
B00100000,
B00100000,
B00100000,
B00100000,
6,
B10001000, //U
B10001000,
B10001000,
B10001000,
B10001000,
B10001000,
B01110000,
6,
B10001000, //V
B10001000,
B10001000,
B10001000,
B10001000,
B01010000,
B00100000,
6,
B10001000, //W
B10001000,
B10001000,
B10101000,
B10101000,
B10101000,
B01010000,
6,
B10001000, //X
B10001000,
B01010000,
B00100000,
B01010000,
B10001000,
B10001000,
6,
B10001000, //Y
B10001000,
B10001000,
B01010000,
B00100000,
B00100000,
B00100000,
6,
B11111000, //Z
B00001000,
B00010000,
B00100000,
B01000000,
B10000000,
B11111000,
6,
B11100000, //[
B10000000,
B10000000,
B10000000,
B10000000,
B10000000,
B11100000,
4,
B00000000, //(Backward Slash)
B10000000,
B01000000,
B00100000,
B00010000,
B00001000,
B00000000,
6,
B11100000, //]
B00100000,
B00100000,
B00100000,
B00100000,
B00100000,
B11100000,
4,
B00100000, //^
B01010000,
B10001000,
B00000000,
B00000000,
B00000000,
B00000000,
6,
B00000000, //_
B00000000,
B00000000,
B00000000,
B00000000,
B00000000,
B11111000,
6,
B10000000, //`
B01000000,
B00100000,
B00000000,
B00000000,
B00000000,
B00000000,
4,
B00000000, //a
B00000000,
B01110000,
B00001000,
B01111000,
B10001000,
B01111000,
6,
B10000000, //b
B10000000,
B10110000,
B11001000,
B10001000,
B10001000,
B11110000,
6,
B00000000, //c
B00000000,
B01110000,
B10001000,
B10000000,
B10001000,
B01110000,
6,
B00001000, //d
B00001000,
B01101000,
B10011000,
B10001000,
B10001000,
B01111000,
6,
B00000000, //e
B00000000,
B01110000,
B10001000,
B11111000,
B10000000,
B01110000,
6,
B00110000, //f
B01001000,
B01000000,
B11100000,
B01000000,
B01000000,
B01000000,
6,
B00000000, //g
B01111000,
B10001000,
B10001000,
B01111000,
B00001000,
B01110000,
6,
B10000000, //h
B10000000,
B10110000,
B11001000,
B10001000,
B10001000,
B10001000,
6,
B01000000, //i
B00000000,
B11000000,
B01000000,
B01000000,
B01000000,
B11100000,
4,
B00010000, //j
B00000000,
B00110000,
B00010000,
B00010000,
B10010000,
B01100000,
5,
B10000000, //k
B10000000,
B10010000,
B10100000,
B11000000,
B10100000,
B10010000,
5,
B11000000, //l
B01000000,
B01000000,
B01000000,
B01000000,
B01000000,
B11100000,
4,
B00000000, //m
B00000000,
B11010000,
B10101000,
B10101000,
B10001000,
B10001000,
6,
B00000000, //n
B00000000,
B10110000,
B11001000,
B10001000,