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「機房環控DIY實作」目錄
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10. 新增ifttt溫度超過發報
1. Arduino
2. DHT 溫溼度感應器
3. 乙太網路擴充板 Ethernet Shield
3-1 基本介紹
3-2 1-1 DHCP取IP
3-3 Web Server
4. WebServer 結合 DHT
5. 註冊&安裝
6. 新增Channels
7. Thingspeak程式
8. ifttt
9. Thingspeak + ifttt程式
10. 新增ifttt溫度超過發報
11. 待續
11-1 網路校時程式
11-2 Power Over Ethernet 網路供電
11-2 Power Over Ethernet 網路供電
機房環控DIY實作 ========= 網路校時程式 下載：<https://github.com/brucetsao/techbang/tree/master/201602> ``` <pre class="brush:cpp;"> 網路校時測試程式(UdpNtpClient) /* 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 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[] = { 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF }; IPAddress ip(192, 168, 2, 200); //fix ip IPAddress dnServer(168, 95, 1, 1); //dns ip // the router's gateway address: IPAddress gateway(192, 168, 2, 1); //gateway ip // the subnet: IPAddress subnet(255, 255, 255, 0); //sub mask unsigned int localPort = 8888; // local port to listen for UDP packets 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; int Ntpyr,Ntpmon,Ntpday,Ntphr,Ntpmin,Ntpsec ; void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for Leonardo only } // start Ethernet and UDP if (Ethernet.begin(mac) == 0) { Serial.println("Failed to configure Ethernet using DHCP"); // no point in carrying on, so do nothing forevermore: Ethernet.begin(mac, ip, dnServer, gateway, subnet); } 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, esxtract 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 + 8 * 60*60 ; // print Unix time: Serial.println(epoch); Ntphr = (epoch % 86400L) / 3600 ; Ntpmin = (epoch % 3600) / 60 ; Ntpsec = epoch % 60 ; // print the hour, minute and second: Serial.print("The Taiwan time is "); // UTC is the time at Greenwich Meridian (GMT) Serial.print(print2digits(Ntphr)); // print the hour (86400 equals secs per day) Serial.print(':'); Serial.print(print2digits(Ntpmin)); // print the minute (3600 equals secs per minute) Serial.print(':'); Serial.println(print2digits(Ntpsec)); // print the second } // wait ten seconds before asking for the time again delay(10000); } // send an NTP request to the time server at the given address unsigned long sendNTPpacket(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(); } String print2digits(int number) { String ttt ; if (number >= 0 && number < 10) { ttt =String("0")+String(number); } else { ttt =String(number); } return ttt ; } String print4digits(int number) { String ttt ; ttt =String(number); return ttt ; } ``` 參考資料：http://www.techbang.com/posts/40869-smart-home-arduino-internet-soul-internet-school
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10. 新增ifttt溫度超過發報
