DHCP connection failed

[SylvainH]

Hi,

I can’t connected to my controllino Maxi automation through DHCP. I have “ethernet shield not found” as a result. Any idea what could be the problem ? I have tried a fresh install of arduini IDE, older ethernet library. Thanks for your help.

Here is my sketch (basic DhcpAdressPrinter arduino sketch) :

#include <SPI.h>
#include <Controllino.h>

/*
DHCP-based IP printer

This sketch uses the DHCP extensions to the Ethernet library
to get an IP address via DHCP and print the address obtained.
using an Arduino Wiznet Ethernet shield.

Circuit:
Ethernet shield attached to pins 10, 11, 12, 13

created 12 April 2011
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi

*/

#include <SPI.h>
#include <Ethernet.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[] = {
0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02
};

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 the Ethernet connection:
Serial.println(“Initialize Ethernet with DHCP:”);
if (Ethernet.begin(mac) == 0) {
Serial.println(“Failed to configure Ethernet using DHCP”);
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);
}
}
// print your local IP address:
Serial.print(“My IP address: “);
Serial.println(Ethernet.localIP());
}

void loop() {
switch (Ethernet.maintain()) {
case 1:
//renewed fail
Serial.println(“Error: renewed fail”);
break;

case 2:
//renewed success
Serial.println(“Renewed success”);
//print your local IP address:
Serial.print(“My IP address: “);
Serial.println(Ethernet.localIP());
break;

case 3:
//rebind fail
Serial.println(“Error: rebind fail”);
break;

case 4:
//rebind success
Serial.println(“Rebind success”);
//print your local IP address:
Serial.print(“My IP address: “);
Serial.println(Ethernet.localIP());
break;

default:
//nothing happened
break;
}
}

[Lukas]

Hi,

comment out the line

Ethernet.init(10); // Most Arduino shields

The chipselect is defined in the board definition, so it will be defined properly when you select the Board – CONTROLLINO.

Please use the latest Ethernet library.

Good luck!

Lukas

[Oldtimer]

<font style=”vertical-align: inherit;”><font style=”vertical-align: inherit;”>Hallo, hatte heute das selbe Problem aber dank Euren Beitrags konnte ich es sofort beheben!</font></font>

[Lukas]

Great, thanks for the feedback!

Oltimer says: Hello, I had the same problem today but thanks to your contribution I was able to fix it immediately!