ESP32 Fetch BTC price from CoinDesk API

main.c

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ArduinoJson.h>

// Change ID/PWD
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C Address of LCD 16x02
void setup() {
Serial.begin(115200);
lcd.begin();
lcd.backlight();
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
lcd.print("Connected");
delay(2000);
}
void loop() {
WiFiClient client;
const char* host = "api.coindesk.com";
const char* url = "/v1/bpi/currentprice/BTC.json";
if (client.connect(host, 80)) {
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n");
delay(500);
String line;
while (client.available()) {
line = client.readStringUntil('\n');
if (line.startsWith("{")) {
DynamicJsonDocument doc(1024);
deserializeJson(doc, line);
float price = doc["bpi"]["USD"]["rate_float"];
lcd.clear();
lcd.print("BTC Price: ");
lcd.print(price);
break;
}
}
} else {
Serial.println("Connection failed");
}
client.stop();
delay(60000); //ms
}