February 17, 2022 by share Open-Tech
This project shows you how to connect to NTP server using ESP32 simulator and update the time on the LCD!
I will show you how to simulate ESP32 and create an IoT project in this project. You will learn how to read the NTC time over the internet and display the time on the LCD!
ESP32 IoT demo project is an easy-to-use project that will help you understand the ESP32 Wi-Fi NTP (Network Time Protocol). Let us get started...?♂️
NTP Server -> pool.ntp.org
Connection diagram for the NTP IoT demo for Wokwi Arduino Simulator
The Complete code
#include <WiFi.h>
#include <TimeLib.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
#define NTP_SERVER "pool.ntp.org"
#define UTC_OFFSET 0
#define UTC_OFFSET_DST 0
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() {
struct tm timeinfo;
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");
}
void setup() {
Serial.begin(115200);
delay(10);
LCD.init();
LCD.backlight();
LCD.setCursor(0, 0);
LCD.print("Connecting to ");
LCD.setCursor(0, 1);
LCD.print("WiFi ");
WiFi.begin("Wokwi-GUEST", "");
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(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
}
void loop() {
printLocalTime();
delay(250);
}https://wokwi.com/arduino/projects/321525495180034642
ESP32 Simulator - Wokwi supports two ESP32 boards..(more on the way ;) ). Most of the features are available or in progress.. at the time of writing this article following components of the ESP32 simulator were fully functional
Please follow the link for the latest updates on the Wokwi ESP32 simulator features
You can provide full internet access to the ESP32 component on the simulator using a Wokwi gateway. You can use the Wokwi ESP32 simulator and simulate an IoT virtual project in several use case scenarios.. for example:
Suppose you need any help with the simulator; many Wokwi users are happy to help. You can also share what you liked and did not like in the article. Could you share it in the comments below ??
Facebook group: https://facebook.com/groups/wokwi
Discord: https://wokwi.com/discord
see you until next time ?
Hardware enthusiast with ample interest in Arduino projects
