// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi
#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
const char* ntpServer = "pool.ntp.org";
const long gmtOffset_sec =10800; // 60*60* (+3 GMT) =10800 Jordan TimeZone
const int daylightOffset_sec = 1; //no Daylight saving in Jordan Currently
struct tm timeinfo;
void spinner() {
static int8_t counter = 0;
const char* glyphs = "\xa1\xa5\xdb";
LCD.setCursor(15, 1);
LCD.print(glyphs[counter++]);
if (counter == strlen(glyphs)) {
counter = 0;
}
}
void printLocalTime() {
if (!getLocalTime(&timeinfo)) {
LCD.setCursor(0, 1);
LCD.println("Connection Err");
return;
}
LCD.setCursor(8, 0);
LCD.println(&timeinfo, "%H:%M:%S");
LCD.setCursor(0, 1);
LCD.println(&timeinfo, "%d/%m/%Y %Z");
Serial.println(&timeinfo, "%A, %B %d %Y, %r");
}
void addMinutesToCurrentTime(int x) {
// Get current time
// Add x minutes
time_t now = mktime(&timeinfo);
now += (x * 60); // Convert minutes to seconds and add to current time
localtime_r(&now, &timeinfo);
// Convert 24-hour format to 12-hour format
char time12[16];
strftime(time12, sizeof(time12), "%r", &timeinfo);
// Print the updated time
Serial.print("Updated Time: ");
Serial.println(time12);
}
void setup() {
Serial.begin(115200);
LCD.init();
LCD.backlight();
LCD.setCursor(0, 0);
LCD.print("Connecting to ");
LCD.setCursor(0, 1);
LCD.print("WiFi ");
WiFi.begin("Wokwi-GUEST", "", 6);
while (WiFi.status() != WL_CONNECTED) {
delay(250);
spinner();
}
Serial.println("");
Serial.println("WiFi connected");
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
LCD.clear();
LCD.setCursor(0, 0);
LCD.println("Online");
LCD.setCursor(0, 1);
LCD.println("Updating time...");
configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
}
void loop() {
printLocalTime();
addMinutesToCurrentTime(10); // Change 10 to any desired number of minutes
delay(250);
}