@mfalkvidd Solved, it was my mistake on wiring. Thanks.

@mfalkvidd Thanks a lot as usual! Any I cannot download the libraries: can you give me some instructions to load on my Arduino tool?

Hi.
I have a node composed by Arduino Nano, DHT11 sensor, mini W5100 ethernet shield and OLED 128x32 display.
I'm using Adafruit GFX library to control the OLED display.
The problem is the code size that seems to be more than 32K therefore I cannot compile it.
I tried to squeeze the code but with no success. Any help? Suggestion?

Here my code

// ----------------------------------------------------------- Definitions
#define MY_DEBUG

#define MY_GATEWAY_W5100
#define MY_IP_ADDRESS 192,168,1,71
#define MY_PORT 5070

#define CHILD_ID_HUM 0
#define CHILD_ID_TEMP 1

#define MY_MAC_ADDRESS 0x00, 0x01, 0x02, 0x03, 0x04, 0x05

// Set this to the pin you connected the DHT's data pin to
#define DHT_DATA_PIN 3

// If any Permanent Small Offset to the real temperatures in °C
#define SENSOR_TEMP_OFFSET 0

// OLED SSD1306 
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)

#define COLORBLACK 0x0000 // BLACK

// ----------------------------------------------------------- Libraries
#include <Ethernet.h>
//#include <SPI.h>
#include <MySensors.h>
#include <DHT.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// ----------------------------------------------------------- Variables

// Sleep time between sensor updates (in milliseconds)
// Must be >1000ms for DHT22 and >2000ms for DHT11
static const uint64_t UPDATE_INTERVAL = 5000;
bool metric = true;

MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
DHT dht;

unsigned long startMillis;  //some global variables available anywhere in the program
unsigned long currentMillis;
const unsigned long period = 2000;  //the value is a number of milliseconds

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);


bool FirstTime; // to execute an action once only

// ----------------------------------------------------------- Functions

void presentation()  
{
   sendSketchInfo("Temp/Humidity Soggiorno", "1.0");
   present(CHILD_ID_HUM, S_HUM);
   present(CHILD_ID_TEMP, S_TEMP);

   metric = getControllerConfig().isMetric;
}


void setup()
{
//---------------------------------------------------------- Serial Begin
Serial.begin(9600);
//---------------------------------------------------------- DHT11
  dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor
  
  if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) 
  {
    #ifdef MY_DEBUG
    Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!");
    #endif
  }
  
  // Sleep for the time of the minimum sampling period to give the sensor time to power up
  // (otherwise, timeout errors might occure for the first reading)
  sleep(dht.getMinimumSamplingPeriod());

//---------------------------------------------------------- OLED SSD1306
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) // Address 0x3C for 128x32
  { 
    #ifdef MY_DEBUG
    Serial.println(F("SSD1306 allocation failed"));
    #endif
    for(;;); // Don't proceed, loop forever
  }

  // Show initial display buffer contents on the screen the library initializes this with an Adafruit splash screen.
  display.display();
  delay(500); // Pause for 0,5 second

  // Clear the buffer
  display.clearDisplay();

  display.setTextSize(2); // Draw 2X-scale text
  display.setTextColor(SSD1306_WHITE);

  display.setCursor(2, 16);
  display.println(F("Waiting...."));
  display.display();      // Show initial text
  delay(100);

  // Variable to make action just the first time
  FirstTime = true;
 
//---------------------------------------------------------- Timing
  startMillis = millis();  //initial start time
}


void loop()      
{  
  bool changed; // to note the change of value
  
//---------------------------------------------------------- Verify Timing for Reading    
  currentMillis = millis();  //get the current "time" (actually the number of milliseconds since the program started)
  if (currentMillis - startMillis >= period)  //test whether the period has elapsed
  {
    startMillis = currentMillis;  
    changed = false;
  
//---------------------------------------------------------- WakeUp Sensor
    dht.readSensor(true);

//---------------------------------------------------------- Temperature    
    int temperature = dht.getTemperature();
    
    if (isnan(temperature)) 
    {
      #ifdef MY_DEBUG
      Serial.println("Failed reading temperature from DHT!");
      #endif
    } 
    else 
    {
      // apply the offset before converting to something different than Celsius degrees
      temperature += SENSOR_TEMP_OFFSET;
       if (!metric) 
       {
          temperature = dht.toFahrenheit(temperature);
       }
       send(msgTemp.set(temperature, 1));
      #ifdef MY_DEBUG
      Serial.print("T: ");
      Serial.println(temperature);
      #endif
      
      changed = true;
      CancellaQuadro();

      display.setCursor(64, 0);
      display.print(temperature);
    } 
//---------------------------------------------------------- Humidity    
    int humidity = dht.getHumidity();
    
    if (isnan(humidity)) 
    {
      #ifdef MY_DEBUG
      Serial.println("Failed reading humidity from DHT");
      #endif
    } 
    else 
    {
       send(msgHum.set(humidity, 1));
      #ifdef MY_DEBUG
      Serial.print("H: ");
      Serial.println(humidity);
      #endif

      if (changed == false)
      {
          CancellaQuadro();
      }
      display.setCursor(64, 18);
      display.print(humidity);
    } 
    display.display();      
    delay(100);
  }
}

void CancellaQuadro(void) {
    if (FirstTime == true)
    {
      display.clearDisplay();
      display.setCursor(2, 0);
      display.print(F("Temp:"));
      display.setCursor(90, 0);
      display.print((char)247); // degree symbol
      display.setCursor(105, 0);
      display.print(F("C"));
      display.setCursor(2, 18);
      display.print(F("Hum :"));
      display.setCursor(90, 18);
      display.print(F("%"));
      display.display();
      delay(100);
      FirstTime = false;
    }else
    {
      display.fillRect(64,0, 25, 16, COLORBLACK);
      display.fillRect(64,16, 25, 32, COLORBLACK);
      display.display();
      delay(1);
    }
}

@mfalkvidd Solved, it was my mistake on wiring. Thanks.

Thanks for clarify. So, why my raspberry pi domoticz don't see the gateway? If I try to ping the ethernet gateway i cannot reach it. Ma there any ping test to be used?

@mfalkvidd thanks. Removing the define for radio the output says TSP NA, why?

Hallo. I would like to use a gateway based on Mini W5100 Ethernet shield with no Radio module: is it feasible?
I have connected the devices as indicated in MySensor but I cannot reach my Controller (Domoticz over Raspberry PI).

The output of serial debug is

0 MCO:BGN:INIT GW,CP=RNNGA---,REL=255,VER=2.3.1
4 TSM:INIT
5 TSF:WUR:MS=0
11 !TSM:INIT:TSP FAIL
13 TSM:FAIL:CNT=1
14 TSM:FAIL:DIS
16 TSF:TDI:TSL
10018 TSM:FAIL:RE-INIT
10020 TSM:INIT
10027 !TSM:INIT:TSP FAIL
10029 TSM:FAIL:CNT=2
10031 TSM:FAIL:DIS
10033 TSF:TDI:TSL
20036 TSM:FAIL:RE-INIT
20038 TSM:INIT
20044 !TSM:INIT:TSP FAIL
20046 TSM:FAIL:CNT=3
20048 TSM:FAIL:DIS
20050 TSF:TDI:TSL

Any help?

Hallo.
Is it possible to make portable the Domoticz application? I have a pc where I have not the administrator rights so I'd like to install a portable version of Domoticz.

@mfalkvidd
Now it's working fine. It was an electrical problem. I changed the power supply and now it's working.
Now I have a new question. I use an Arduino Pro Mini Node with ethernet gateway. I have connected to the same node two relays, one switch, one PIR and one DHT11. The question is: what about sleep times? I mean, from the examples of DHT and PIR and others, often it's indicated a Sleep time. SInce the sketch has a unique Loop, how I have to manage the Sleep. Currently I have removed the sleep and I use a counter for each sensor attached to the same MySensors Node. Is this the right solution?

@mfalkvidd My output is identical with the exception of the row related the Eth. I see the row only when the connection with Domoticz is established. Could be a problem of power? I mean, can be a problem related the power despite the green/yellow led of the RJ45 are blinking?

@mfalkvidd I did the test and I obtained a weird result. After several initial test (I started with examples to check the functionality of the ENC28j60, like pinging the Google site) i can say that the wiring between Arduino Pro Mini and ENC28j60 is correct (I saw pinging on my serial monitor). When I test my sktech (that concern one DHT11, two relays and one switch) the connection with the controller (Raspberry PI 3 with Domoticz) is not assured. Time to time I see teh connection on Domoticz but very often the connection is not present. Which debug I can do? Which string I have to receive on my serial monitor to be sure that the Ethernet module is properly recognized? For your info, the power led on the ENC28j60 is lighted and the two leds (green and yellow) on RJ45 port are blinking. I tried to ping the ENC28j60 but I cannot ping it.