Cannot get LadyAda RTC code to compile on PC

Forum 2005-2010 (read only) Software Interfacing
1

I've searched and read through dozens of postings on the Forum and not found anything related exactly to my problem. I am a total novice at this stuff.

I'm trying to interface a DS1307 RTC to my Uno board. I found the excellent tutorial on the subject at LadyAda. I downloaded the LadyAda RTC library and used the example code they listed/provided and tried to put it in a Sketch.

The sketch code starts with:

// Date and time functions using a DS1307 RTC connected via I2C and Wire lib

#include <Wire.h>
#include "RTClib.h"

RTC_DS1307 RTC;

void setup () {
Serial.begin(57600);
Wire.begin();
RTC.begin();

When I try to compile, I get a bunch of error messages:

Date_and_time_from_DS1307.cpp:4:20: error: RTClib.h: No such file or directory
Date_and_time_from_DS1307:5: error: 'RTC_DS1307' does not name a type
Date_and_time_from_DS1307.cpp: In function 'void setup()':
Date_and_time_from_DS1307:10: error: 'RTC' was not declared in this scope
Date_and_time_from_DS1307:15: error: 'DateTime' was not declared in this scope
Date_and_time_from_DS1307.cpp: In function 'void loop()':
Date_and_time_from_DS1307:20: error: 'DateTime' was not declared in this scope
Date_and_time_from_DS1307:20: error: expected ;' before 'now' Date_and_time_from_DS1307:22: error: 'now' was not declared in this scope Date_and_time_from_DS1307:42: error: expected ;' before 'future'
Date_and_time_from_DS1307:45: error: 'future' was not declared in this scope

I can see the RTClib.h file in a folder in my libraries folder under my Arduino 0021 folder...why does the compiler say no such file exists? And why all the other errors that appear to be syntax-related? Am I doing something fundamentally wrong?

Any assistance would be appreciated...thanks in advance.

2

err I'm not sure if there's something special about the RTClib, but all the library files I've seen have #include <lib.h>; instead of "lib.h";

On the other hand, I'd be happy to learn something new! However, due to

I am a total novice at this stuff.

I'm not confident it's a real syntax thing.

3

You should, as kevinsa5 pointed out, use <> instead of "".

The reason for this is, when you use <> to include a file, it looks inside the library folder (the one where you saw the file) for the specified file.
When you use "" to include a file, it searches inside the project folder for the specified file.

Give it a try. You can also search the forum for DS1307 examples.

4

Thank you Kevinsa5 and bubulindo for the replies. I changed the "" to <> on the include statement, but it is still telling me "No such file or directory".

It is weird because, in my Arduino-0021 folder, there is a folder named "libraries"; in that folder are 12 folders such as EEPROM and Wire, plus the new one that I downloaded, which they told me to name RTClib. When I open the latter folder, it clearly contains a file named RTClib.h. Yet, the compiler keeps telling me no such file exists. I checked for case sensitivity, and all seems okay. I opened the RTClib.h file and it reads like legitimate code. I'm perplexed...

5

Hey, I decided to start from scratch with a new Sketch using the same code. This time I started it with the <> instead of the "" in the Include statement from the beginning. and it compiled with no errors.

Thank you both very much for the assistance!