Weather arduino

weather.ino

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClientSecure.h>
#include <Arduino_JSON.h>
#include <LedControl.h>
#include <NTPClient.h>
#include <WiFiUdp.h>

int latitude = 48.83;
int longitude = 10.09;

const char * ssid = "Obi LAN Kenobi";
const char * password = "IHaveTheHighGround";

JSONVar temperature;

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, "pool.ntp.org");

// DIN = 4, CS = 2, CLK = 3, Number of MAX7219 chips = 1
LedControl lc = LedControl(13, 14, 15, 1);

void displayTemperature(int v) {
  int ones;
  int tens;
  int hundreds;

  boolean negative = false;

  if (v < -999 || v > 999)
    return;
  if (v < 0) {
    negative = true;
    v = v * -1;
  }

  ones = v % 10;
  v = v / 10;
  tens = v % 10;
  v = v / 10; hundreds = v;
  if (negative) {
    lc.setChar(0, 3, '-', false);
  } else {
    lc.setChar(0, 3, ' ', false);
  }
  //Now print the number digit by digit
  lc.setDigit(0, 4, (byte)hundreds, false);
  lc.setDigit(0, 3, (byte)tens, true);
  lc.setDigit(0, 2, (byte)ones, false);
  lc.setChar(0, 0, 'C', false);
} 

void displayTime(int hours, int minutes, int seconds) {
    lc.setDigit(0, 7, hours / 10, false);
    lc.setDigit(0, 6, hours % 10, true);

    lc.setDigit(0, 5, minutes / 10, false);
    lc.setDigit(0, 4, minutes % 10, true);

    lc.setDigit(0, 3, seconds / 10, false);
    lc.setDigit(0, 2, seconds % 10, true );
}


JSONVar getTemperature(float latitude, float longitude) {
  WiFiClient client;

  HTTPClient http;
  if (http.begin(client, "rough.isra.workers.dev", 80, String("/?destination=https%3A%2F%2Fapi.brightsky.dev%2Fcurrent_weather%3Flat%3D") + latitude + "%26lon%3D" + longitude, true)) {
    int httpResponseCode = http.GET();

    if (httpResponseCode > 0) {
      String payload = http.getString();
      JSONVar weatherData = JSON.parse(payload);

      return weatherData["weather"]["temperature"];
    } else {
      Serial.print("Error code:");
      Serial.println(httpResponseCode);
    }

    http.end();
  } else {
    Serial.println("Unable to connect");
  }
}

void setup() {
  // The MAX7219 chip is in power-saving mode on startup
  lc.shutdown(0, false); // wakeup call
  lc.setIntensity(0, 8); // Set brightness level (0 is min, 15 is max)
  lc.clearDisplay(0); // Clear display register

  Serial.begin(115200);

  pinMode(D1, INPUT_PULLUP);

  WiFi.begin(ssid, password);
  Serial.print("Connecting");

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

  timeClient.begin();
  timeClient.setTimeOffset(7200);

  temperature = getTemperature(latitude, longitude);
}

void loop() {
  timeClient.update();

  bool isShowingTime;
  isShowingTime = digitalRead(D1);
  
  if(isShowingTime == true){ 
    lc.clearDisplay(0);
    int currentHour = timeClient.getHours();
    int currentMinute = timeClient.getMinutes();
    int currentSecond = timeClient.getSeconds();

    displayTime(currentHour, currentMinute, currentSecond);
  } else {
    lc.clearDisplay(0);
      displayTemperature(round(double(temperature) * 10));
  }
  delay(100);
}