Arduino Project just not fully working looking for help.

It looks like you're using the same pin for the LCD and for the sonar?

Line 24      ->     LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

and

Line 30     ->     #define  TRIGGER_PIN  7

Line 35     ->     NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.

The LCD i would believe is using digital pin 4 while I2C on the UNO is using analog pin 4 so I don't think you would have an issue there.  Can you include schematic/wiring diagram?

Nick

If you look closely the lcd is "//" remmed out of the program so has no bearing on the working part.

But thanks for looking to see if you could help.

Have a great day

but if the physical device is still connected it could be interfering

just a thought

Peter

The device is not hooked up just left logic in program in case I wished to try with a different idea. That way I don't have to spend time re-writing logic.

OK, so not that then, back to the drawing board as they say

Robert

Pin 10 needs to be made an output, but I haven't seen anything saying it should be forced HIGH.

You might want to look at a couple of the SD examples that appears under File - Examples - SD to see what you're missing

void setup()
{
  Serial.begin(9600);
  Serial.print("Initializing SD card...");
  // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
  // Note that even if it's not used as the CS pin, the hardware SS pin 
  // (10 on most Arduino boards, 53 on the Mega) must be left as an output 
  // or the SD library functions will not work. 
  pinMode(10, OUTPUT);

  if (!SD.begin(4)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");

  if (SD.exists("example.txt")) {
    Serial.println("example.txt exists.");
  }
  else {
    Serial.println("example.txt doesn't exist.");
  }

My suggestion is see if you can get the SD card working, then try to integrate it.

Mark

Mark

Thanks but the SD card works just fine if I don't load the libraries I mentioned it is a fully working program until I add the I2C and Wire libraries.Thanks for the suggestion. Perhaps the confusion is coming from the assumption that the program does not work at all. If I just use the I2C and Wire Libraries and the LCD it works , If I use just the Ethernet shield and not the 2 libraries I mentioned it works it is trying to get both the Ethernet shield and the LCD with it libraries to work. I have tried serial lcd as well as I2C lcd neither work along with the SD card and the Ethernet shield. I hope I am making myself a little bit more clear as to what the issue is.

Robert

Just confirm for me you aren't trying adding this one  ... AT ALL

// LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

This is NOT for an I2C display.

Your libraries should look like this

#include <SPI.h>
#include <Ethernet.h>
#include <SD.h>
#include <NewPing.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

if you can, detail where the shield is from, along with the sd card

mark

I'm aware that line was commented out but I was under the impression that the problems arose when you added the LCD back in with the other components.  I just wanted to verify that you weren't using that line anymore.  Can you point us to which shields you are actually using and possible include the libraries you are using (at least the ones that aren't included in Arduino already)

Thanks

mcb1

Right now I am not using any LCD of any kind.

I only left these lines in the program for my ease. I remmed everything out I didn't need to make it work with out the LCD.

I will upload the Working sketch but it does not have any LCD displays of any kind in the sketch.

I want to use a I2c LCD but like I said earlier if I load the I2c liquid crystal library and the wire libarary then the Ethernet card does not load the "htm" file from the SD card and they display shows no data. The sketch will compile without error.

Thanks

Can I ask a simple question, (In the absence of an immediate answer I will proceed with a yes )

What happens when the LCD is included in the program, does everything else except the LCD work or do other devices like the SD card, start to fail

also what is the chip on the LCD serial to parallel board, there are many versions and I have been bitten in the past assuming it was the one in the standard library

Please take a picture or draw on paint if necessary your layout with all the connections

I have all the parts your using and will replicate the issue and see what I can find

Peter

building it our now so hope to have an answer later today

building it our now so hope to have an answer later today