Which will be the best way to count time without rtc?

Projects Programming
1

So I'm working on a project where I need to count time in hour format. Like a elapsed time counter. But there are many parts where I need to do the same conversion again and again in this way : millis/3600000
So I tried to make a extra function that'll return the 'time' variable if it gets hours as input. But I was trying to define the data type as unsigned long. Ide isn't compiling it showing error. What am I doing wrong? Can int data type do the job? I don't need 100% precision. So I'm ditching rtc. Any suggestions is appreciated.

I'm coding on Android. Here's the error picture

Screenshot_2023-01-08-03-21-41-185_name.antonsmirnov.android.arduinodroid2
Screenshot_2023-01-08-03-21-41-185_name.antonsmirnov.android.arduinodroid21600×2560 228 KB

2

Start by posting your best attempt at writing a sketch to do what you want, using code tags when you do

3

Hi,
Help us help you, your 'project is in your head.
Post your code and error msgs (using the appropriate </> tags) .

4

In the IDE there is a "copy error messsage" button. That will copy the entire error message to the clipboard. Then you can paste the message into a post. Paraphrasing the error messsge leaves out important information.

5

Edited

6

I couldn't find copy message so I edited it with screenshot.

7

Hi, @imposterwolf
Your code missing the "void loop()" function, required in projects with the Arduino IDE.

Although your time function requires 2 parameters, you didn't supply them.
I tested your code in the simulator and it compiled without errors.

I suggest you learn how to post code and errors correctly.

8

A really, really good way to handle clock times without any RTC is the DateTime library.

9

I looked into it and I think rtc would be the best choice. Anyway how much current does an rtc 1307 draw?

10

Yeah thanks. I forgot the parameters. I'll buy a rtc ig

11

You may be disappointed with the DS1307. I have a couple and they do not keep great time. The DS3231 is much better.

1 Like
12

No wonder that has relatively low price. Damn I bought it before reading the comment.

13

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