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Ethernet Shield V3.0 with Arduino Uno Can't configure DHCP

userHead Bing.GGo 2024-03-24 13:36:27 131 Views0 Replies

Hi 

Using the sample code from dfrobot (see below) 

Arduino IDE2.3.2 
Ethernet shield V3.0 (https://wiki.dfrobot.com/DFRduino_Ethernet_W5100S_SKU_DFR0125#target_6)

 

getting can't configure DHCP and then shield was not found 
the shield is connected correctly 

the board is checked it works

the ethernet cable is fine, its a home network through a router d-link with DHCP ability
all my otherdevices such as laptops, raspberry pi, esp32 have no issue getting dynamic up addresses from router 

code sample 

/*

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
modified 02 Sept 2015
by Arturo Guadalupi

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[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};

unsigned int localPort = 8888;       // local port to listen for UDP packets

const 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;

void setup() {
 // You can use Ethernet.init(pin) to configure the CS pin
 //Ethernet.init(10);  // Most Arduino shields
 //Ethernet.init(5);   // MKR ETH shield
 //Ethernet.init(0);   // Teensy 2.0
 //Ethernet.init(20);  // Teensy++ 2.0
 //Ethernet.init(15);  // ESP8266 with Adafruit Featherwing Ethernet
 //Ethernet.init(33);  // ESP32 with Adafruit Featherwing Ethernet

 // Open serial communications and wait for port to open:
 Serial.begin(9600);
 while (!Serial); // wait for serial port to connect. Needed for native USB port only

 // start Ethernet and UDP
 if (Ethernet.begin(mac) == 0) {
   Serial.println("Failed to configure Ethernet using DHCP");
   // Check for Ethernet hardware present
   if (Ethernet.hardwareStatus() == EthernetNoHardware) {
     Serial.println("Ethernet shield was not found.  Sorry, can't run without hardware. :(");
   } else if (Ethernet.linkStatus() == LinkOFF) {
     Serial.println("Ethernet cable is not connected.");
   }
   // no point in carrying on, so do nothing forevermore:
   while (true) {
     delay(1);
   }
 }
 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, extract 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 70 years and change to China time zone:
   unsigned long epoch = secsSince1900 - seventyYears + 28800;
   // print Unix time:
   Serial.println(epoch);


   // print the hour, minute and second:
   Serial.print("The UTC time is ");       // UTC is the time at Greenwich Meridian (GMT)
   Serial.print((epoch  % 86400L) / 3600); // print the hour (86400 equals secs per day)
   Serial.print(':');
   if (((epoch % 3600) / 60) < 10) {
     // In the first 10 minutes of each hour, we'll want a leading '0'
     Serial.print('0');
   }
   Serial.print((epoch  % 3600) / 60); // print the minute (3600 equals secs per minute)
   Serial.print(':');
   if ((epoch % 60) < 10) {
     // In the first 10 seconds of each minute, we'll want a leading '0'
     Serial.print('0');
   }
   Serial.println(epoch % 60); // print the second
 }
 // wait ten seconds before asking for the time again
 delay(10000);
 Ethernet.maintain();
}

// send an NTP request to the time server at the given address
void sendNTPpacket(const 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();
}