Error on Display, "Error Loading Data" (code below)

[idonthaveklutch]

/*******************************************************************
A project to display crypto currency prices using an ESP8266

Main Hardware:
- NodeMCU Development Board (Any ESP8266 dev board will work)
- OLED I2C Display (SH1106)

Written by Brian Lough
https://www.youtube.com/channel/UCezJOfu7OtqGzd5xrP3q6WA

*******************************************************************/

// ----------------------------
// Standard Libraries - Already Installed if you have ESP8266 set up
// ----------------------------

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <Wire.h>

// ----------------------------
// Additional Libraries - each one of these will need to be installed.
// ----------------------------

#include <CoinMarketCapApi.h>
// For Integrating with the CoinMarketCap.com API
// Available on the library manager (Search for "CoinMarket")
// https://github.com/witnessmenow/arduino-coinmarketcap-api

#include "SH1106.h"
// The driver for the OLED display
// Available on the library manager (Search for "esp8266 oled driver")
// https://github.com/squix78/esp8266-oled-ssd1306

#include <ArduinoJson.h>
// !! NOTE !!: When installing this select an older version than V6 from the drop down
// Required by the CoinMarketCapApi Library for parsing the response
// Available on the library manager (Search for "arduino json")
//https://github.com/bblanchon/ArduinoJson

// ----------------------------
// Configurations - Update these
// ----------------------------

char ssid[] = "Jon's Wi-Fi Network"; // your network SSID (name)
char password[] = "Ruuskahouse1"; // your network key

// Pins based on your wiring
#define SCL_PIN 14
#define SDA_PIN 0

// CoinMarketCap's limit is "no more than 10 per minute"
// Make sure to factor in if you are requesting more than one coin.
// We'll request a new value just before we change the screen so it's the most up to date
unsigned long screenChangeDelay = 10000; // Every 10 seconds

// Have tested up to 10, can probably do more
#define MAX_HOLDINGS 10

#define CURRENCY "usd" //See CoinMarketCap.com for currency options (usd, gbp etc)
#define CURRENCY_SYMBOL "$" // Euro doesn't seem to work, $ and £ do

// You also need to add your crypto currecnies in the setup function

// ----------------------------
// End of area you need to change
// ----------------------------

WiFiClientSecure client;
CoinMarketCapApi api(client);

SH1106 display(0x3c, SDA_PIN, SCL_PIN);

unsigned long screenChangeDue;

struct Holding {
String tickerId;
float amount;
bool inUse;
CMCTickerResponse lastResponse;
};

Holding holdings[MAX_HOLDINGS];

int currentIndex = -1;
String ipAddressString;

void addNewHolding(String tickerId, float amount = 0) {
int index = getNextFreeHoldingIndex();
if (index > -1) {
holdings[index].tickerId = tickerId;
holdings[index].amount = amount;
holdings[index].inUse = true;
}
}

void setup() {

Serial.begin(115200);

// ----------------------------
// Holdings - Add your currencies here
// ----------------------------
// Go to the currencies coinmarketcap.com page
// and take the tickerId from the URL (use bitcoin or ethereum as an example)

addNewHolding("bitcoin");
addNewHolding("dogecoin");
addNewHolding("ripple");

// ----------------------------
// Everything below can be thinkered with if you want but should work as is!
// ----------------------------

// Initialising the display
display.init();
display.setTextAlignment(TEXT_ALIGN_CENTER);
display.setFont(ArialMT_Plain_16);
display.drawString(64, 0, F("HODL Display"));
display.setFont(ArialMT_Plain_10);
display.drawString(64, 18, F("By Brian Lough"));
display.display();

// Set WiFi to station mode and disconnect from an AP if it was Previously
// connected
WiFi.mode(WIFI_STA);
WiFi.disconnect();
delay(100);

// Attempt to connect to Wifi network:
Serial.print("Connecting Wifi: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
delay(500);
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
IPAddress ip = WiFi.localIP();
Serial.println(ip);
ipAddressString = ip.toString();
}

int getNextFreeHoldingIndex() {
for (int i = 0; i < MAX_HOLDINGS; i++) {
if (!holdings[i].inUse) {
return i;
}
}

return -1;
}

int getNextIndex() {
for (int i = currentIndex + 1; i < MAX_HOLDINGS; i++) {
if (holdings[i].inUse) {
return i;
}
}

for (int j = 0; j <= currentIndex; j++) {
if (holdings[j].inUse) {
return j;
}
}

return -1;
}

void displayHolding(int index) {

CMCTickerResponse response = holdings[index].lastResponse;

display.clear();

display.setTextAlignment(TEXT_ALIGN_CENTER);
display.setFont(ArialMT_Plain_16);
display.drawString(64, 0, response.symbol);
display.setFont(ArialMT_Plain_24);
double price = response.price_currency;
if (price == 0) {
price = response.price_usd;
}
display.drawString(64, 20, formatCurrency(price));
display.setFont(ArialMT_Plain_16);
// display.setTextAlignment(TEXT_ALIGN_CENTER);
// display.drawString(64, 48, " 1h:" + String(response.percent_change_1h) + "%");
display.setTextAlignment(TEXT_ALIGN_CENTER);
display.drawString(64, 48, "24h: " + String(response.percent_change_24h) + "%");

display.display();
}

void displayMessage(String message){
display.clear();
display.setFont(ArialMT_Plain_10);
display.setTextAlignment(TEXT_ALIGN_LEFT);
display.drawStringMaxWidth(0, 0, 128, message);
display.display();
}

String formatCurrency(float price) {
String formattedCurrency = CURRENCY_SYMBOL;
int pointsAfterDecimal = 6;
if (price > 100) {
pointsAfterDecimal = 2;
} else if (price > 1) {
pointsAfterDecimal = 4;
}
formattedCurrency.concat(String(price, pointsAfterDecimal));
return formattedCurrency;
}

bool loadDataForHolding(int index) {
int nextIndex = getNextIndex();
if (nextIndex > -1 ) {
holdings[index].lastResponse = api.GetTickerInfo(holdings[index].tickerId, CURRENCY);
return holdings[index].lastResponse.error == "";
}

return false;
}

void loop() {
unsigned long timeNow = millis();
if ((timeNow > screenChangeDue)) {
currentIndex = getNextIndex();
if (currentIndex > -1) {
if (loadDataForHolding(currentIndex)) {
displayHolding(currentIndex);
} else {
displayMessage(F("Error loading data."));
}
} else {
displayMessage(F("No funds to display. Edit the setup to add them"));
}
screenChangeDue = timeNow + screenChangeDelay;
}
}

[witnessmenow]

Coinmarket cap have shut down their V1 of their API

witnessmenow/arduino-coinmarketcap-api#4

This project won't work til there is another library for getting the data

[idonthaveklutch]

No alternatives??

…

On Sun, Dec 23, 2018, 4:58 AM Brian Lough ***@***.*** wrote: Coinmarket cap have shut down their V1 of their API witnessmenow/arduino-coinmarketcap-api#4 <witnessmenow/arduino-coinmarketcap-api#4> This project won't work til there is another library for getting the data — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#5 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/Ar8V-SL7SKIM2OTxxwFrucwriLtgD5LHks5u71PSgaJpZM4ZfwCr> .

[Michail1]

API down as of March 5th, 2020.
Alternative is coinbase or coindesk for free API.
CMC has a free API if you request a key and update the code.

[ariknel]

Use thingspeak to create a api key