Hi,
I am making a project to monitor certain parameters on xively.
I am using:
- Arduino 1.0.6 I.D.E.
- Arduino uno R3
- Arduino wifi shield with WiFi firmware version: 1.1.0. (upgraded firmware to last version).
My Sheild is working good just had a issue that is shows 6 minutes delay in time.
Previously it was working fine with the same codes but today it is showing 6minutes delay
#include <SPI.h>
#include <WiFi.h>
#include <WiFiUdp.h>
#include <HttpClient.h>
#include <Time.h>
// ****** WiFi Settings ******
char ssid[] = "Hitech"; // your network SSID (name)
char pass[] = "******"; // your network password (use for WPA, or use as key for WEP)
//int keyIndex = 0; // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;
WiFiClient client;
// ****** NTP Server Settings ******
// Local time server
IPAddress timeServer(216, 171, 112, 36);
// GMT offset (in seconds) - currently set for GMT + 5.5
const long timeZoneOffset = 19800L;
// Syncs to NTP server every x seconds
unsigned int ntpSyncTime = 3600;
// Local port to listen for UDP packets
unsigned int localPort = 8888;
// NTP time stamp is in the first 48 bytes of the message
const int NTP_PACKET_SIZE= 48;
// Buffer to hold incoming and outgoing packets
byte packetBuffer[NTP_PACKET_SIZE];
// A UDP instance to let us send and receive packets over UDP
WiFiUDP Udp;
// Keeps track of how long ago we updated the NTP server
unsigned long ntpLastUpdate = 0;
// Check last time clock displayed (Not in Production)
time_t prevDisplay = 0;
//boolean timeUpdated = false;
//int timeIncrement = 0;
void setup() {
Serial.begin(9600);
// check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while(true);
}
// attempt to connect to Wifi network:
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait 10 seconds for connection:
delay(10000);
}
Serial.println("Connected to wifi");
printWifiStatus();
Serial.println("\nStarting connection to server...");
//Try to get the date and time
int trys=0;
while(!getTimeAndDate() && trys<10) {
trys++;
}
// calibrate light limits
}
void loop() {
//Reset time once per day
//if (timeIncrement >= 3) {
// Update the time via NTP server as often as the time you set at the top
if(now()-ntpLastUpdate > ntpSyncTime) {
int trys=0;
while(!getTimeAndDate() && trys<10){
trys++;
}
if(trys<10){
Serial.println("ntp server update success");
//timeIncrement = 0;
}
else{
Serial.println("ntp server update failed");
}
}
// Display the time if it has changed by more than a second.
if( now() != prevDisplay){
prevDisplay = now();
clockDisplay();
}
//timeIncrement += 1;
delay(60000);
}
int getTimeAndDate() {
int flag=0;
Udp.begin(localPort);
sendNTPpacket(timeServer);
delay(10000); // set delay
if (Udp.parsePacket()){
Udp.read(packetBuffer,NTP_PACKET_SIZE); // read the packet into the buffer
unsigned long highWord, lowWord, epoch;
highWord = word(packetBuffer[40], packetBuffer[41]);
lowWord = word(packetBuffer[42], packetBuffer[43]);
epoch = highWord << 16 | lowWord;
epoch = epoch - 2208988800 + timeZoneOffset;
flag=1;
setTime(epoch);
ntpLastUpdate = now();
}
Udp.stop();
return flag;
}
unsigned long sendNTPpacket(IPAddress& address) {
memset(packetBuffer, 0, NTP_PACKET_SIZE);
packetBuffer[0] = 0b11100011;
packetBuffer[1] = 0;
packetBuffer[2] = 6;
packetBuffer[3] = 0xEC;
packetBuffer[12] = 49;
packetBuffer[13] = 0x4E;
packetBuffer[14] = 49;
packetBuffer[15] = 52;
Udp.beginPacket(address, 123);
Udp.write(packetBuffer,NTP_PACKET_SIZE);
Udp.endPacket();
}
void clockDisplay() {
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) {
Serial.print(":");
if(digits < 10)
Serial.print('0');
Serial.print(digits);
}
void printWifiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}
if i change the line
const long timeZoneOffset = 19800L;
to
const long timeZoneOffset = 19800L+375L; it works fine but it will some temporary solution
Is there any thing i need to change like the ntp server or any other solution