Marius M

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Dec 26,2023

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ESP01 - TM1637 NTP CLOCK

Basic ESP01 NTP clock with a 0.56'' TM1537 7 segments display.

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Published: Dec 26,2023

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Topic

DIY Electronics

Clocks

ESP8266 Clock DIY USB

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	#include <Arduino.h>
	#include "TM1637.h"
	#include <NTPClient.h>
	#include <ESP8266WiFi.h>
	#include <WiFiUdp.h>
	#include <Timezone.h>
	#include <WiFiManager.h> // https://github.com/tzapu/WiFiManager

	#ifdef U8X8_HAVE_HW_SPI
	#include <SPI.h>
	#endif
	#ifdef U8X8_HAVE_HW_I2C
	#include <Wire.h>
	#endif
	#include <ThingSpeak.h>
	//pins definitions for TM1637 and can be changed to other ports
	#define CLK 2 // 2 for esp-01 (12 for D1 mini)
	#define DIO 0 // 0 for esp-01 (14 for D1 mini)

	#define UPDATE 3000 // ms for updating screen

	//const char *ssid = "xxxxxxx"; //your SSID
	//const char *password = "xxxxxxx"; //your password

	int status = WL_IDLE_STATUS;
	WiFiClient client;
	WiFiUDP ntpUDP;
	NTPClient timeClient(ntpUDP, "ro.pool.ntp.org", 0 /10800 seconds for summer time, 7200 winter time/, 60000); //NTPClient(UDP& udp, const char* poolServerName, int timeOffset, int updateInterval);
	TM1637 tm1637(CLK, DIO);
	bool points = true;
	uint32_t time1, time2;
	time_t local, utc;
	String h, m;
	WiFiManager wm;

	uint8_t NumTab[] = { 1, 9, 2, 0xff, 1, 6, 8, 0xff, 4, 0xff, 1, 0xff, 0xff, 0xff, 0xff, 0xff }; // 192.168.4.1
	uint8_t ListDisp[4];
	unsigned char i = 0;
	unsigned char count = 0;

	void setup() {
	WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP
	Serial.begin(115200);
	wm.setConfigPortalBlocking(false);
	tm1637.init();
	tm1637.set(0); //set the brightness DARKEST = 0, BRIGHTEST = 7
	timeClient.begin();
	//WiFi.begin(ssid, password);

	///////reset settings - wipe credentials FOR TESTING
	//wm.resetSettings();

	wm.autoConnect("NTP_CLOCK_TM1637", "password#123"); // connect to 192.168.4.1 to configure WiFi
	}

	void loop(void) {
	wm.process();
	if (WiFi.status() != WL_CONNECTED) {
	i = count;
	count++;
	if (count == sizeof(NumTab)) count = 0;
	for (unsigned char BitSelect = 0; BitSelect < 4; BitSelect++) {
	ListDisp[BitSelect] = NumTab[i];
	i++;
	if (i == sizeof(NumTab)) i = 0;
	}
	tm1637.display(0, ListDisp[0]);
	tm1637.display(1, ListDisp[1]);
	tm1637.display(2, ListDisp[2]);
	tm1637.display(3, ListDisp[3]);
	delay(300);
	}

	else {
	timeClient.update();

	unsigned long epochTime = timeClient.getEpochTime();
	// convert received time stamp to time_t object
	utc = epochTime;

	// Then convert the UTC UNIX timestamp to local time
	TimeChangeRule EEST = { "EEST", Last, Sun, Mar, 3, 180 }; //Ora de vara - //Central European Time (Frankfurt, Paris) Sun, 2
	TimeChangeRule EET = { "EET", Last, Sun, Oct, 4, 120 }; //Ora de iarna - Central European Time (Frankfurt, Paris)
	Timezone EE(EEST, EET);
	local = EE.toLocal(utc);

	displayTime();

	delay(UPDATE);
	}
	}

	void displayTime() {

	//////// reduce brightness at night time (between 19:00 and 07:00)
	tm1637.point(POINT_ON); //turn points on

	if (hour(local) >= 19 \|\| hour(local) <= 7) {
	tm1637.set(1);
	} else {
	tm1637.set(7);
	}

	////////// "compose" time as String and display it
	h = "";
	// format the time to 12-hour format with AM/PM and no seconds
	if (hour(local) < 10) // add a space if hour is under 10
	h += "0";
	h += hour(local);
	int digitoneH = h.toInt() / 10;
	int digittwoH = h.toInt() % 10;
	tm1637.display(0, digitoneH);
	tm1637.display(1, digittwoH);
	//t += ":"; // colon is handled in display
	m = "";
	if (minute(local) < 10) // add a zero if minute is under 10
	m += "0";
	m += minute(local);
	int digitoneM = m.toInt() / 10;
	int digittwoM = m.toInt() % 10;
	tm1637.display(2, digitoneM);
	tm1637.display(3, digittwoM);

	Serial.print("Time is: ");
	Serial.print(digitoneH);
	Serial.print(digittwoH);
	Serial.print(":");
	Serial.print(digitoneM);
	Serial.println(digittwoM);
	}

ESP01 - TM1637 NTP CLOCK

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