getting started with time

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

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+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+;
+
+[platformio]
+default_envs = esp32dev
+src_dir = src
+
+[env:esp32dev]
+framework = arduino
+platform = [email protected] ; https://registry.platformio.org/platforms/platformio/espressif32/versions
+board = esp32dev
+build_flags = -DCORE_DEBUG_LEVEL=0
+monitor_speed = 115200
+lib_deps =

src/a.ino

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+/*
+  Rui Santos
+  Complete project details at https://RandomNerdTutorials.com/esp32-date-time-ntp-client-server-arduino/
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files.
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+*/
+
+#include "time.h"
+#include <WiFi.h>
+
+const char* ssid = "REPLACE_WITH_YOUR_SSID";
+const char* password = "REPLACE_WITH_YOUR_PASSWORD";
+
+const char* ntpServer = "pool.ntp.org";
+const long gmtOffset_sec = -3600 * 5;
+
+void setup()
+{
+    Serial.begin(115200);
+
+    // Connect to Wi-Fi
+    Serial.print("Connecting to ");
+    Serial.println(ssid);
+    WiFi.begin("Brown-Guest");
+    while (WiFi.status() != WL_CONNECTED) {
+        delay(500);
+        Serial.print(".");
+    }
+    Serial.println("");
+    Serial.println("WiFi connected.");
+
+    // Init and get the time
+    configTime(gmtOffset_sec, 3600, ntpServer);
+}
+
+void loop()
+{
+    delay(1000);
+    struct tm timeinfo;
+
+    if (!getLocalTime(&timeinfo)) {
+        Serial.println("Failed to obtain time");
+        return;
+    }
+    time_t now;
+    time(&now);
+    Serial.println(now);
+    printLocalTime();
+}
+
+void printLocalTime()
+{
+    struct tm timeinfo;
+    if (!getLocalTime(&timeinfo)) {
+        Serial.println("Failed to obtain time");
+        return;
+    }
+    time_t now;
+
+    time(&now);
+    Serial.println(now);
+
+    Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
+    Serial.print("Day of week: ");
+    Serial.println(&timeinfo, "%A");
+    Serial.print("Month: ");
+    Serial.println(&timeinfo, "%B");
+    Serial.print("Day of Month: ");
+    Serial.println(&timeinfo, "%d");
+    Serial.print("Year: ");
+    Serial.println(&timeinfo, "%Y");
+    Serial.print("Hour: ");
+    Serial.println(&timeinfo, "%H");
+    Serial.print("Hour (12 hour format): ");
+    Serial.println(&timeinfo, "%I");
+    Serial.print("Minute: ");
+    Serial.println(&timeinfo, "%M");
+    Serial.print("Second: ");
+    Serial.println(&timeinfo, "%S");
+
+    Serial.println("Time variables");
+    char timeHour[3];
+    strftime(timeHour, 3, "%H", &timeinfo);
+    Serial.println(timeHour);
+    char timeWeekDay[10];
+    strftime(timeWeekDay, 10, "%A", &timeinfo);
+    Serial.println(timeWeekDay);
+    Serial.println();
+}