#ifdef ESP8266
#include <ESP8266WiFi.h>
#elif defined(ESP32)
#include <WiFi.h>
#endif
#include <time.h>
// Timezone definition to get properly time from NTP server
#define MYTZ "CET-1CEST,M3.5.0,M10.5.0/3"
struct tm Time;
//////////////////////////////// NTP Time /////////////////////////////////////////
void getUpdatedtime(const uint32_t timeout)
{
uint32_t start = millis();
do
{
time_t now = time(nullptr);
Time = *localtime(&now);
} while (millis() - start < timeout && Time.tm_year <= (1970 - 1900));
}
void funzione_orologio()
{
WiFi.disconnect(true);
WiFi.mode(WIFI_OFF);
for (int i = 0; i < 5; i++)
{
// The variable now contains the system time as Unix Time (number of seconds since 01/01/1970)
time_t now = time(nullptr);
// The instruction localtime get the value of now
// and fit the members of struct tm t, so t.tm_hour
// will be equal to actual hour, t.tm_min to minutes etcetc.
struct tm t = *localtime(&now);
Serial.println("Orologio è:");
Serial.print(t.tm_hour); Serial.print("\t"); Serial.print(t.tm_min); Serial.print("\t"); Serial.println(t.tm_sec);
int ore = 0; int minuti = 0; int secondi = 0;
ore = t.tm_hour; minuti = t.tm_min; secondi = t.tm_sec;
Serial.println("mostro le variabili");
Serial.print(ore); Serial.print("\t"); Serial.print(minuti); Serial.print("\t"); Serial.println(secondi);
delay(3000);
}
}
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
WiFi.begin("Wokwi-GUEST", "", 6);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.print("\nWiFi connected. IP address: ");
Serial.println(WiFi.localIP());
#ifdef ESP8266
configTime(MYTZ, "time.google.com", "time.windows.com", "pool.ntp.org");
#elif defined(ESP32)
configTzTime(MYTZ, "time.google.com", "time.windows.com", "pool.ntp.org");
#endif
// The first time it take some time to sync
getUpdatedtime(10000);
funzione_orologio();
}
void loop() {
// put your main code here, to run repeatedly:
delay(10); // this speeds up the simulation
static uint32_t printTime;
if (millis() - printTime > 1000) {
printTime = millis();
getUpdatedtime(0);
char buffer [80];
/*
https://cplusplus.com/reference/ctime/strftime/
*/
strftime (buffer, 80, "Now it's %Ec\n", &Time);
Serial.printf (buffer);
}
}