arduino stuffs
Diffstat (limited to 'libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino')
| -rw-r--r-- | libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino b/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino deleted file mode 100644 index ec52717..0000000 --- a/libraries/Ethernet/examples/UdpNtpClient/UdpNtpClient.ino +++ /dev/null @@ -1,156 +0,0 @@ -/* - - Udp NTP Client - - Get the time from a Network Time Protocol (NTP) time server - Demonstrates use of UDP sendPacket and ReceivePacket - For more on NTP time servers and the messages needed to communicate with them, - see http://en.wikipedia.org/wiki/Network_Time_Protocol - - created 4 Sep 2010 - by Michael Margolis - modified 9 Apr 2012 - by Tom Igoe - modified 02 Sept 2015 - by Arturo Guadalupi - - This code is in the public domain. - - */ - -#include <SPI.h> -#include <Ethernet.h> -#include <EthernetUdp.h> - -// Enter a MAC address for your controller below. -// Newer Ethernet shields have a MAC address printed on a sticker on the shield -byte mac[] = { - 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED -}; - -unsigned int localPort = 8888; // local port to listen for UDP packets - -const char timeServer[] = "time.nist.gov"; // time.nist.gov NTP server - -const int NTP_PACKET_SIZE = 48; // NTP time stamp is in the first 48 bytes of the message - -byte packetBuffer[NTP_PACKET_SIZE]; //buffer to hold incoming and outgoing packets - -// A UDP instance to let us send and receive packets over UDP -EthernetUDP Udp; - -void setup() { - // You can use Ethernet.init(pin) to configure the CS pin - //Ethernet.init(10); // Most Arduino shields - //Ethernet.init(5); // MKR ETH shield - //Ethernet.init(0); // Teensy 2.0 - //Ethernet.init(20); // Teensy++ 2.0 - //Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet - //Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet - - // Open serial communications and wait for port to open: - Serial.begin(9600); - while (!Serial) { - ; // wait for serial port to connect. Needed for native USB port only - } - - // start Ethernet and UDP - if (Ethernet.begin(mac) == 0) { - Serial.println("Failed to configure Ethernet using DHCP"); - // Check for Ethernet hardware present - if (Ethernet.hardwareStatus() == EthernetNoHardware) { - Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :("); - } else if (Ethernet.linkStatus() == LinkOFF) { - Serial.println("Ethernet cable is not connected."); - } - // no point in carrying on, so do nothing forevermore: - while (true) { - delay(1); - } - } - Udp.begin(localPort); -} - -void loop() { - sendNTPpacket(timeServer); // send an NTP packet to a time server - - // wait to see if a reply is available - delay(1000); - if (Udp.parsePacket()) { - // We've received a packet, read the data from it - Udp.read(packetBuffer, NTP_PACKET_SIZE); // read the packet into the buffer - - // the timestamp starts at byte 40 of the received packet and is four bytes, - // or two words, long. First, extract the two words: - - unsigned long highWord = word(packetBuffer[40], packetBuffer[41]); - unsigned long lowWord = word(packetBuffer[42], packetBuffer[43]); - // combine the four bytes (two words) into a long integer - // this is NTP time (seconds since Jan 1 1900): - unsigned long secsSince1900 = highWord << 16 | lowWord; - Serial.print("Seconds since Jan 1 1900 = "); - Serial.println(secsSince1900); - - // now convert NTP time into everyday time: - Serial.print("Unix time = "); - // Unix time starts on Jan 1 1970. In seconds, that's 2208988800: - const unsigned long seventyYears = 2208988800UL; - // subtract seventy years: - unsigned long epoch = secsSince1900 - seventyYears; - // print Unix time: - Serial.println(epoch); - - - // print the hour, minute and second: - Serial.print("The UTC time is "); // UTC is the time at Greenwich Meridian (GMT) - Serial.print((epoch % 86400L) / 3600); // print the hour (86400 equals secs per day) - Serial.print(':'); - if (((epoch % 3600) / 60) < 10) { - // In the first 10 minutes of each hour, we'll want a leading '0' - Serial.print('0'); - } - Serial.print((epoch % 3600) / 60); // print the minute (3600 equals secs per minute) - Serial.print(':'); - if ((epoch % 60) < 10) { - // In the first 10 seconds of each minute, we'll want a leading '0' - Serial.print('0'); - } - Serial.println(epoch % 60); // print the second - } - // wait ten seconds before asking for the time again - delay(10000); - Ethernet.maintain(); -} - -// send an NTP request to the time server at the given address -void sendNTPpacket(const char * 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(); -} - - - - - - - - - - |