Comparing 2 Serial.Println

Using Arduino Project Guidance
1

Hi Guys,

I'm really new to arduino and recently started some coding. I was wondering is there any way i can compare 2 Serial.Println?

Im working with a mq-7 Sensor and want to compare 2 values the mq-7 sensor gives back to me.

the end goal is: if 4 values after each other are the same then do something.

Thanks for the help!

ArduinoBot2000

2

Store the results that you get from your sensor in an array; don't print the results directly.

Next you can compare the array elements for the same value and act on that.

3

you got a link to a post on this forum explaining that some more?

4

Have you looked at any of the programming examples in the IDE?

5

One thing that will be of help is the Serial input basics post. That tells you how to read data from the serial input, and store it in a string.

After that you can check whether they're equal by doing a simple string comparison:

(edit: code correction)

if (strcmp(string1, string2) == 0) { 
  // Equal!
}
6

ArduinoBot2000:
you got a link to a post on this forum explaining that some more?

How about posting your current code so we can see what you're doing and tailor our advise.

7 
//if (strcmp(string1, string2) == -1) { 
if (strcmp(string1, string2) == 0) {
  // Equal!
}
8

You're right... thanks for the correction, I was mixing up things again :slight_smile: