next topic »

[on:]

Hello,

I have a problem in to my code. I am using an Arduino Ethernet and i want to print something in my lcd display.

Code:

void setup()
{

  // start serial port
  Serial.begin(9600);
  Serial.println("GRobotronics Serial Monitor - Temperature Sensors Check");
  Ethernet.begin(mac, ip, gateway, gateway, subnet);
  Serial.println("Initializing...");
  Serial.println();
  delay(5000);
  // Start up the library
  lcd.begin(16, 2);
  sensors.begin();

This is a part of my void setup, when i have the code like this the lcd doesn't printing. But when i put in comment this part of code

Code:

//Ethernet.begin(mac, ip, gateway, gateway, subnet);

the lcd is printing.

Sorry for my pure english, can anyone help me with this issue?

Thanks in advance

[Reply #1 on:]

Post your full code.

[Reply #2 on:]

Also what pins are you using to connect the lcd?

[Reply #3 on:]

Code:

#include <OneWire.h>
#include <DallasTemperature.h>
#include <SPI.h>
#include <Ethernet.h>
#include <LiquidCrystal.h>

// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS 8

LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
// arrays to hold device addresses
DeviceAddress insideThermometer, outsideThermometer;



byte mac[] = {  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1,249);
IPAddress gateway(192, 168, 1, 1);
IPAddress subnet(255, 255, 255, 0);
IPAddress server(46, 46, 46, 46);
EthernetClient client;

float tempC ;
float tempC0 ;
float tempC1 ;
char tempBuffer1[8];
char tempBuffer2[8];
int ledPin = 9;
float oldTemp0;
float oldTemp1;

void setup()
{

  // start serial port
  Serial.begin(9600);
  Serial.println("GRobotronics Serial Monitor - Temperature Sensors Check");
  Ethernet.begin(mac, ip, gateway, gateway, subnet);
  Serial.println("Initializing...");
  Serial.println();
  delay(5000);
  // Start up the library
  lcd.begin(16, 2);
  sensors.begin();
 
  // locate devices on the bus
  Serial.print("Found ");
  Serial.print(sensors.getDeviceCount(), DEC);
  Serial.println(" devices.");

  // search for devices on the bus and assign based on an index.
  if (!sensors.getAddress(insideThermometer, 0)) Serial.println("Unable to find address for Device 0");
  if (!sensors.getAddress(outsideThermometer, 1)) Serial.println("Unable to find address for Device 1");

  // show the addresses we found on the bus
  Serial.print("Device 0 Address: ");
  printAddress(insideThermometer);
  Serial.println();

  Serial.print("Device 0 Alarms: ");
  printAlarms(insideThermometer);
  Serial.println();
 
  Serial.print("Device 1 Address: ");
  printAddress(outsideThermometer);
  Serial.println();

  Serial.print("Device 1 Alarms: ");
  printAlarms(outsideThermometer);
  Serial.println();
 
  Serial.println("Setting alarm temps...");

  // alarm when temp is higher than 30C
  sensors.setHighAlarmTemp(insideThermometer, 25);
 
  // alarm when temp is lower than -10C
  sensors.setLowAlarmTemp(insideThermometer, 18);
 
  // alarm when temp is higher than 31C
  sensors.setHighAlarmTemp(outsideThermometer, 30);
 
  // alarn when temp is lower than 27C
  sensors.setLowAlarmTemp(outsideThermometer, 4);
 
  Serial.print("Set Inside Alarm : ");
  printAlarms(insideThermometer);
  Serial.println();
 
  Serial.print("Set Outside Alarm: ");
  printAlarms(outsideThermometer);
  Serial.println();
 

 
  pinMode(ledPin, OUTPUT);
 
}
char pageAdd[32];

// function to print a device address
void printAddress(DeviceAddress deviceAddress)
{
  for (uint8_t i = 0; i < 8; i++)
  {
    if (deviceAddress[i] < 16) Serial.print("0");
    Serial.print(deviceAddress[i], HEX);
  }
}

// function to print the temperature for a device
void printTemperature(DeviceAddress deviceAddress)
{
  float tempC = sensors.getTempC(deviceAddress);
  float tempC0 = sensors.getTempC(insideThermometer);
  float tempC1 = sensors.getTempC(outsideThermometer);
  dtostrf(tempC0,3,1,tempBuffer1);
  dtostrf(tempC1,3,1,tempBuffer2);
  Serial.print("Temp C: ");
  Serial.println(tempC);
}

void printAlarms(uint8_t deviceAddress[])
{
  char temp;
  temp = sensors.getHighAlarmTemp(deviceAddress);
  Serial.print("High Alarm: ");
  Serial.print(temp, DEC);
  Serial.print("C, ");
  temp = sensors.getLowAlarmTemp(deviceAddress);
  Serial.print("Low Alarm: ");
  Serial.print(temp, DEC);
  Serial.print("C");
}

// main function to print information about a device
void printData(DeviceAddress deviceAddress)
{
  //Serial.print("Device Address: ");
  //printAddress(deviceAddress);
  Serial.print(" ");
  printTemperature(deviceAddress);
}

void checkAlarm(DeviceAddress deviceAddress)
{
  if (sensors.hasAlarm(deviceAddress))
  {
    Serial.print("ALARM: ");
    printData(deviceAddress);
    digitalWrite(ledPin, HIGH);   // sets the LED on
    delay(1000);                  // waits for a seconds
  }
}
void sendTemp()
{
  float tempC0 = sensors.getTempC(insideThermometer);
  float tempC1 = sensors.getTempC(outsideThermometer);
 
  if (oldTemp0 != tempC0 || oldTemp1 != tempC1) {
  Serial.println("Start Sending to database...");
  sprintf(pageAdd,"/arduino.php?temp1=%s&temp2=%s",tempBuffer1,tempBuffer2);
  Serial.print("-->Inside Temperature: ");
  Serial.println(tempBuffer1);
  Serial.print("-->Outside Temperature: ");
  Serial.println(tempBuffer2);
  delay(1000);
  if(!getPage(server,pageAdd));
  }
  oldTemp0 = tempC0;
  oldTemp1 = tempC1;
}

void lcdPrint(void)
{
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print("Temp is: ");
}

/*-----------------------------------------void loop-----------------------------------------------------------------------*/
void loop(void)
{
  digitalWrite(ledPin, LOW);   // sets the LED on
 
  // request to all devices on the bus
  Serial.print("Requesting temperatures...");
  sensors.requestTemperatures();
  Serial.println("DONE");
 
  // check each address individually for an alarm condition
  checkAlarm(insideThermometer);
  checkAlarm(outsideThermometer);
 
  // print the device information
  printData(insideThermometer);
  printData(outsideThermometer);
 
  delay(1000);
 
  sendTemp();

  lcdPrint();
 


// if(!getPage(server,pageAdd));
  }

/*-----------------------------------------end void loop-----------------------------------------------------------------------*/


 
byte getPage(IPAddress ipBuf,char *page)
{
  int inChar;
  char outBuf[128];


  Serial.print("connecting...");

  if(client.connect(ipBuf,80))
  {
    Serial.println("connected");

    sprintf(outBuf,"GET %s HTTP/1.1\r\nHost: www.grobotronicsprojects.com\r\n\r\n",page);
    client.write(outBuf);
    Serial.println("Temperatures saved succesfull in your database!!!");
    delay(5000);
  }
  else
  {
    Serial.println("failed");
  }
 
  while(client.connected())
  {
    while(client.available())
    {
      inChar = client.read();
      //Serial.write(inChar);
    }

    delay(10);
 
  }
 
  Serial.println("disconnecting.");

  Serial.println();
  client.stop();
  Serial.println("<------------------------------------------------->");
  Serial.print("Wait 5sec ");
  for(int x=5;x>0;x--){
  delay(1000);

  Serial.print( x);
 
 
  }
  Serial.println();
  Serial.println("<------------------------------------------------->");
  Serial.println();
}

[Reply #4 on:]

My pins are right because i test the lcd with another program and it works. Also with this code if you put in comments

Code:

Ethernet.begin(mac, ip, gateway, gateway, subnet);

agian lcd works.

LCD PIN 1 --> GROUND
LCD PIN 2 --> +5V
LCD PIN 3 --> POTENTIOMENTER
LCD PIN 4 --> PIN 12
LCD PIN 5 --> PIN 11
LCD PIN 6 --> PIN 10
LCD PIN 7-10 --> NONE
LCD PIN 11 --> PIN 5
LCD PIN 12 --> PIN 4
LCD PIN 13 --> PIN 3
LCD PIN 14 --> PIN 2
LCD PIN 15 --> +3.3V
LCD PIN 16 --> GROUND

ONEWIRE TEMPERATURES --> PIN 8

[Reply #5 on:]

Ok so then the next question is, what pins does the ethernet shield use? If they use any of the same pins, you will have problems.

[Reply #6 on:]

My pins are right because i test the lcd with another program and it works.

No, they aren't. The Ethernet shield uses pins 10, 11, 12, and 13.

[Reply #7 on:]

With the ethernet shield on, your using all but pins 6 and 7.
10-13: Ethernet shield
9: LED
8: temperature sensor
6-7: open
2-5: LCD

You need to move 10-12 (LCD pins) somewhere else, but you only have 2 digital pins left. So either get rid of the LED on pin 9, or get a I2C LCD adapter.

You might be able to use the analog pins as well.

[Reply #8 on:]

I am not using a shield, I have arduino Ethernet board not Ethernet shield....

[Reply #9 on:]

Makes...no...difference...The...ethernet...to...Arduio...communication...is...via...SPI...on...pins...10,,,11,,,12,,,and...13.

Does the extra punctuation really help?

[Reply #10 on:]

Have a look for yourself.

NB: Pins 10, 11, 12 and 13 are reserved for interfacing with the Ethernet module and should not be used otherwise. This reduces the number of available pins to 9, with 4 available as PWM outputs.

http://arduino.cc/en/Main/ArduinoBoardEthernet

[Reply #11 on:]

So I need to change the pins of the LCD display???
Does anyone know where I can find help to connect the LCD hd44780 using i2c via mcp23017??

[Reply #12 on:]

So I need to change the pins of the LCD display???
Does anyone know where I can find help to connect the LCD hd44780 using i2c via mcp23017??

http://blog.littlebirdelectronics.com/arduino-i2c-mcp-23017-lcd-interface

Though its probably easier to buy one of these https://www.adafruit.com/products/292