Code
/*
UDPSendAnalogInput:
Kirim pakai UDP ke 192.168.0.100:2003
Format
test.data analogdata unixtime
Sinkronisasi waktu dari PC linux menggunakan perintah
date +T%s\n > /dev/ttyACM0
date +T%s\n > /dev/ttyACM1
date +T%s\n > /dev/ttyACMx
created 27 Feb 2016
by Onno W. Purbo
*/
#include <SPI.h> // needed for Arduino versions later than 0018
#include <Ethernet.h>
#include <EthernetUdp.h> // UDP library from: bjoern@cs.stanford.edu 12/30/2008
#include <TimeLib.h>
#define TIME_HEADER "T" // Header tag for serial time sync message
#define TIME_REQUEST 7 // ASCII bell character requests a time sync message
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0x02, 0xCA, 0xFF, 0xEE, 0xBA, 0xBE
};
IPAddress ip(192, 168, 0, 4);
unsigned int localPort = 8888; // local port to listen on
// Kirim ke graphite carbon cache di 192.168.0.100:2003 melalui UDP
EthernetUDP Udp;
IPAddress remoteIP(192,168,0,100);
unsigned int remotePort = 2003;
void setup() {
// start the Ethernet and UDP:
Ethernet.begin(mac, ip);
Udp.begin(localPort);
Serial.begin(9600);
setSyncProvider( requestSync); //set function to call when sync required
Serial.println("Waiting for sync message");
}
void loop() {
if (Serial.available()) {
processSyncMessage();
}
if(timeStatus() == timeNotSet)
Serial.println("waiting for sync message");
else {
Udp.beginPacket(remoteIP, remotePort);
int sensorReading = analogRead(0);
Udp.write("test.data ");
Udp.print(sensorReading);
Udp.write(" ");
Udp.println(now());
Serial.write("test.data ");
Serial.print(sensorReading);
Serial.write(" ");
Serial.println(now());
Udp.endPacket(); }
delay(100);
}
void processSyncMessage() {
unsigned long pctime;
const unsigned long DEFAULT_TIME = 1357041600; // Jan 1 2013
if(Serial.find(TIME_HEADER)) {
pctime = Serial.parseInt();
if( pctime >= DEFAULT_TIME) { // check the integer is a valid time (greater than Jan 1 2013)
setTime(pctime); // Sync Arduino clock to the time received on the serial port
}
}
}
time_t requestSync()
{
Serial.write(TIME_REQUEST);
return 0; // the time will be sent later in response to serial mesg
}
Referensi