IT-Syndikat/ITSynOpen
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Added NTP functionality. Now all tweets are different

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This commit is contained in:
Romedius Weiss 2013-01-21 23:18:08 +01:00
parent 54b71965de
commit e674788ace
2 changed files with 120 additions and 5 deletions
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11
README.md
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@ -1,4 +1,13 @@
ITSynOpen
=========
A custom Arduino device with Ethernet Shield showing via Twitter if somebody is in the Hackerspace.
A custom Arduino device with Ethernet Shield showing via Twitter if somebody is in the Hackerspace.
Recommended partlist:
---------------------
* LED's for ethernet + resistors: red green and yellow
* Status LED's: red, yellow, green + blue for unknown
* 2 push buttons as input
* A prototype shield

114
TSI_inout_ino/TSI_inout_ino.ino
View file

@ -26,10 +26,14 @@ Example sketches from Arduino team, Ethernet by Adrian McEwen
#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
// Local Network Settings
byte mac[] = { 0xD4, 0x28, 0xB2, 0xFF, 0xA0, 0xA1 }; // Must be unique on local network
unsigned int localPort = 8888; // local port to listen for UDP packets
// ThingSpeak Settings
char thingSpeakAddress[] = "api.thingspeak.com";
String thingtweetAPIKey = "21I4R9UJQZJSC60Y";
@ -39,6 +43,20 @@ long lastConnectionTime = 0;
boolean lastConnected = false;
int failedCounter = 0;
// NTP stuff
//IPAddress timeServer(132, 163, 4, 101); // time-a.timefreq.bldrdoc.gov NTP server
IPAddress timeServer(193,170,62,252); // ana austrian one
// IPAddress timeServer(132, 163, 4, 102); // time-b.timefreq.bldrdoc.gov NTP server
// IPAddress timeServer(132, 163, 4, 103); // time-c.timefreq.bldrdoc.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;
// Initialize Arduino Ethernet Client
EthernetClient client;
@ -48,7 +66,7 @@ int hsopen =-1;
int ethernetstatus = -1;
//debug options
boolean debug = false;
boolean debug = true;
const int ropen=5;
const int rwait=6;
const int rclosed=7;
@ -88,7 +106,7 @@ void setup()
// Start Ethernet on Arduino
setEth(-1);
startEthernet();
delay(1000);
setRoom(hsopen);
@ -99,7 +117,7 @@ void loop()
{
if((digitalRead(topen)==LOW)&&(hsopen!=1)){
setRoom(2);
if(updateTwitterStatus("Hackerspace @ Freies Theater: OPENING ---")==0){
if(updateTwitterStatus("Hackerspace @ Freies Theater: OPENING at " + read_time())==0){
hsopen=1;
}
else
@ -111,7 +129,7 @@ void loop()
}
if((digitalRead(tclose)==LOW)&&(hsopen!=0)){
setRoom(2);
if(updateTwitterStatus("Hackerspace @ Freies Theater: CLOSING ---")==0){
if(updateTwitterStatus("Hackerspace @ Freies Theater: CLOSING at " + read_time())==0){
hsopen=0;
}
else
@ -219,6 +237,7 @@ void startEthernet()
Serial.println("Arduino connected to network using DHCP");
Serial.println();
}
Udp.begin(localPort);
setEth(1);
}
@ -245,3 +264,90 @@ void setRoom(int statuss){
digitalWrite(rclosed,((statuss==0)?HIGH:LOW));
digitalWrite(runknown,((statuss==-1)?HIGH:LOW));
}
//NTP Functions: Read the Time from NTP Server
String read_time(){
String time= "";
Serial.println("readTime");
sendNTPpacket(timeServer); // send an NTP packet to a time server
// wait to see if a reply is available
for(int i = 50; i>0;i--){
if(debug){
Serial.print("iteration ");
Serial.println(i);
}
delay(50);
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;
if(debug){
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:
if(debug){
Serial.println(epoch);
}
//time +="The UTC time is "; // UTC is the time at Greenwich Meridian (GMT)
time +=((epoch + 3600) % 86400L) / 3600; // print the hour (86400 equals secs per day)
time +=':';
if ( ((epoch % 3600) / 60) < 10 ) {
// In the first 10 minutes of each hour, we'll want a leading '0'
time +="0";
}
time +=((epoch % 3600) / 60); // print the minute (3600 equals secs per minute)
time +=':';
if ( (epoch % 60) < 10 ) {
// In the first 10 seconds of each minute, we'll want a leading '0'
time +="0";
}
time+=epoch %60;
if(debug){Serial.println(time);}
return(time);
}
}
}
// send an NTP request to the time server at the given address
unsigned long 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();
}