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ESP8266 NTP Timeserver with Alarms
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| /* | |
| * alarmsystem.ino | |
| * | |
| * This sketch uses the ESP8266WiFi library | |
| */ | |
| #include <TimeLib.h> | |
| #include <Time.h> | |
| #include <TimeAlarms.h> | |
| #include <ESP8266WiFi.h> | |
| #include <WiFiUdp.h> | |
| const char ssid[] = "SSID"; // your network SSID (name) | |
| const char pass[] = "PASSWORD"; // your network password | |
| // NTP Servers: | |
| //IPAddress timeServer(132, 163, 4, 101); // time-a.timefreq.bldrdoc.gov | |
| IPAddress timeServer(91, 206, 8, 36); // 0.at.pool.ntp.org | |
| // IPAddress timeServer(132, 163, 4, 102); // time-b.timefreq.bldrdoc.gov | |
| // IPAddress timeServer(132, 163, 4, 103); // time-c.timefreq.bldrdoc.gov | |
| const int timeZone = 1; // Central European Time | |
| //const int timeZone = -5; // Eastern Standard Time (USA) | |
| //const int timeZone = -4; // Eastern Daylight Time (USA) | |
| //const int timeZone = -8; // Pacific Standard Time (USA) | |
| //const int timeZone = -7; // Pacific Daylight Time (USA) | |
| #define ALARM_ON_PIN 12 | |
| #define ALARM_OFF_PIN 12 | |
| WiFiUDP Udp; | |
| unsigned int localPort = 8888; // local port to listen for UDP packets | |
| void setup() | |
| { | |
| Serial.begin(9600); | |
| pinMode(ALARM_ON_PIN, OUTPUT); | |
| pinMode(ALARM_OFF_PIN, OUTPUT); | |
| while (!Serial) ; // Needed for Leonardo only | |
| delay(250); | |
| UpdateNTP(); | |
| Serial.println("Setting Alarms..."); | |
| Alarm.alarmRepeat(22,1,0, AlarmON); // every day at 22:00 | |
| Alarm.alarmRepeat(8,0,0, AlarmOFF); // every day at 08:00 | |
| Alarm.alarmRepeat(0,0,1, UpdateNTP); | |
| //Alarm.timerRepeat(5, AlarmON); //test | |
| } | |
| time_t prevDisplay = 0; // when the digital clock was displayed | |
| void loop() | |
| { | |
| if (timeStatus() != timeNotSet) { | |
| if (now() != prevDisplay) { // update the display only if time has changed | |
| prevDisplay = now(); | |
| digitalClockDisplay(); | |
| Alarm.delay(1000); | |
| } | |
| } | |
| } | |
| void pressButton(byte pin) { | |
| digitalWrite(pin, HIGH); | |
| delay(500); | |
| digitalWrite(pin, LOW); | |
| } | |
| // functions to be called when an alarm triggers: | |
| void AlarmON(){ | |
| pressButton(ALARM_ON_PIN); | |
| } | |
| void AlarmOFF(){ | |
| pressButton(ALARM_OFF_PIN); | |
| } | |
| void UpdateNTP() { | |
| Serial.println("TimeNTP Example"); | |
| Serial.print("Connecting to "); | |
| Serial.println(ssid); | |
| WiFi.begin(ssid, pass); | |
| while (WiFi.status() != WL_CONNECTED) { | |
| delay(500); | |
| Serial.print("."); | |
| } | |
| Serial.print("IP number assigned by DHCP is "); | |
| Serial.println(WiFi.localIP()); | |
| Serial.println("Starting UDP"); | |
| Udp.begin(localPort); | |
| Serial.print("Local port: "); | |
| Serial.println(Udp.localPort()); | |
| Serial.println("waiting for sync"); | |
| setSyncProvider(getNtpTime); | |
| } | |
| void digitalClockDisplay(){ | |
| // digital clock display of the time | |
| Serial.print(hour()); | |
| printDigits(minute()); | |
| printDigits(second()); | |
| Serial.print(" "); | |
| Serial.print(day()); | |
| Serial.print("."); | |
| Serial.print(month()); | |
| Serial.print("."); | |
| Serial.print(year()); | |
| Serial.println(); | |
| } | |
| void printDigits(int digits){ | |
| // utility for digital clock display: prints preceding colon and leading 0 | |
| Serial.print(":"); | |
| if(digits < 10) | |
| Serial.print('0'); | |
| Serial.print(digits); | |
| } | |
| /*-------- NTP code ----------*/ | |
| const int NTP_PACKET_SIZE = 48; // NTP time is in the first 48 bytes of message | |
| byte packetBuffer[NTP_PACKET_SIZE]; //buffer to hold incoming & outgoing packets | |
| time_t getNtpTime() | |
| { | |
| while (Udp.parsePacket() > 0) ; // discard any previously received packets | |
| Serial.println("Transmit NTP Request"); | |
| sendNTPpacket(timeServer); | |
| uint32_t beginWait = millis(); | |
| while (millis() - beginWait < 1500) { | |
| int size = Udp.parsePacket(); | |
| if (size >= NTP_PACKET_SIZE) { | |
| Serial.println("Receive NTP Response"); | |
| Udp.read(packetBuffer, NTP_PACKET_SIZE); // read packet into the buffer | |
| unsigned long secsSince1900; | |
| // convert four bytes starting at location 40 to a long integer | |
| secsSince1900 = (unsigned long)packetBuffer[40] << 24; | |
| secsSince1900 |= (unsigned long)packetBuffer[41] << 16; | |
| secsSince1900 |= (unsigned long)packetBuffer[42] << 8; | |
| secsSince1900 |= (unsigned long)packetBuffer[43]; | |
| return secsSince1900 - 2208988800UL + timeZone * SECS_PER_HOUR; | |
| } | |
| } | |
| Serial.println("No NTP Response :-("); | |
| return 0; // return 0 if unable to get the time | |
| } | |
| // send an NTP request to the time server at the given address | |
| void sendNTPpacket(IPAddress &address) | |
| { | |
| // set all bytes in the buffer to 0 | |
| memset(packetBuffer, 0, NTP_PACKET_SIZE); | |
| // Initialize values needed to form NTP request | |
| // (see URL above for details on the packets) | |
| packetBuffer[0] = 0b11100011; // LI, Version, Mode | |
| packetBuffer[1] = 0; // Stratum, or type of clock | |
| packetBuffer[2] = 6; // Polling Interval | |
| packetBuffer[3] = 0xEC; // Peer Clock Precision | |
| // 8 bytes of zero for Root Delay & Root Dispersion | |
| packetBuffer[12] = 49; | |
| packetBuffer[13] = 0x4E; | |
| packetBuffer[14] = 49; | |
| packetBuffer[15] = 52; | |
| // all NTP fields have been given values, now | |
| // you can send a packet requesting a timestamp: | |
| Udp.beginPacket(address, 123); //NTP requests are to port 123 | |
| Udp.write(packetBuffer, NTP_PACKET_SIZE); | |
| Udp.endPacket(); | |
| } |
jmartens2
commented
Jan 23, 2023
via email
It’s been 2 years since I last used this sketch. I believe you need to google the IP address of your time server for your country/area of the globe and figure out which zone your in. I know that sounds vague but I’m on my way to work right now. See if it helps you
…Sent from my iPhone
On Jan 23, 2023, at 6:12 AM, demoking23 ***@***.***> wrote:
***@***.*** commented on this gist.
can plz tell what are the change needed for india time zone IST in the zone
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