Hola alguien tiene algun codigo que funcione con el esp8266 para conectar con servidor horario de internet "NTP" para obtener la hora?
yo he probado este, la comunicacion con el esp8266 es correcta y se conecta al wifi bien, se conecta al servidor ntp pero no obtiene respuesta
// Target Access Point
#define ssid "******"
#define pass "******"
#define mySerial Serial1
unsigned long time = 0;
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
//#include <SoftwareSerial.h>
//SoftwareSerial mySerial(10, 11); // RX, TX
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// set the data rate for the SoftwareSerial port
mySerial.begin(115200);
delay (1000);
connectWiFi(); // Start the WiFi module
setPacket();
}
void loop() // run over and over
{
if (mySerial.available())
Serial.write(mySerial.read());
if (Serial.available())
mySerial.write(Serial.read());
}
void connectWiFi()
{
//Rest the module.
Serial.println("AT+RST");
mySerial.println("AT+RST");
time = millis();
while ((time + 2000) >= millis()){
if (mySerial.available() > 0) {
Serial.write(mySerial.read());
}
}
delay(20);
//Set the wireless mode
Serial.println("AT+CWMODE=1");
mySerial.println("AT+CWMODE=1");
time = millis();
while ((time + 500) >= millis()){
if (mySerial.available() > 0) {
Serial.write(mySerial.read());
}
}
delay(20);
//disconnect - it shouldn't be but just to make sure
Serial.println("AT+CWQAP");
mySerial.println("AT+CWQAP");
time = millis();
while ((time + 1000) >= millis()){
if (mySerial.available() > 0) {
Serial.write(mySerial.read());
}
}
// connect to your wireless router
String cmd="AT+CWJAP=\"";
cmd+=ssid;
cmd+="\",\"";
cmd+=pass;
cmd+="\"";
Serial.println(cmd);
mySerial.println(cmd);
//delay(2000);
time = millis();
while ((time + 15000) >= millis()){
if (mySerial.available() > 0) {
Serial.write(mySerial.read());
}
}
//print the ip addr
mySerial.println("AT+CIFSR");
Serial.println("ip address:");
time = millis();
while ((time + 5000) >= millis()){
if (mySerial.available() > 0) {
Serial.write(mySerial.read());
}
}
//set the single connection mode
Serial.println("AT+CIPMUX=0");
mySerial.println("AT+CIPMUX=0");
time = millis();
while ((time + 1000) >= millis()){
if (mySerial.available() > 0) {
Serial.write(mySerial.read());
}
}
//Connect to the NTP server
String cmd1 = "AT+CIPSTART=\"UDP\",\"";
cmd1 += "129.6.15.28";
cmd1 += "\",123";
mySerial.println(cmd1);
Serial.println(cmd1);
time = millis();
while ((time + 5000) >= millis()){
if (mySerial.available() > 0) {
Serial.write(mySerial.read());
}
}
}
void setPacket(){
// 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;
//mySerial.write("192.168.0.13", 123);
mySerial.write(packetBuffer,NTP_PACKET_SIZE);
// Serial.println(packetBuffer,NTP_PACKET_SIZE);
//Udp.endPacket();
//delay (2000);
//mySerial.readBytes(packetBuffer, 48);
//Serial.write(packetBuffer,NTP_PACKET_SIZE);
}
