Serial Monitor Test Issues

Projects Programming
1

Brand new to the Arduino and coding world. Having an issue with my Mega2560 and trying to do some basics. Code below.

const int DIN_PIN = 7;

void setup(){
    pinMode( DIN_PIN, INPUT );
    Serial.begin(115200);
}

void loop(){
    int value;
    
    value = digitalRead( DIN_PIN );
    Serial.println( value );

    delay (1000);
}

All I want to do is get a simple return on the serial monitor if I have the pin either jumped to 5v or GND. When I upload the code, it only displays the state of the pin when it uploads, so it does not seem to be executing the loop. I get a 1 if my jumper is on pin 7 and 5V, and get a 0 if the jumper is not on the 5V.

2

Did you mean to call analogRead?

3

I do not think so. I found this is an example code on a different website. I will link at the end here. I am mostly just trying to figure out serial monitor reads, so that I can troubleshoot a basic button circuit that I could not get to work earlier either.

The Basics of Arduino: Reading Switch States (deviceplus.com)

4

By "not on the 5V" I assume you mean the jumper is only connected to pin 7. In which case this should help...

https://www.google.com/search?q=floating+pin+site:forum.arduino.cc

And this...

5

Ok after some more trials with even simpler code, such as just getting the built in LED to blink on and off for one second, which also was not working, I restart my computer. Seems to have entirely fixed all my problems. I can now see the serial monitor when using 9600 baud instead of on 115200, I got the built in LED to blink, and this little test is also working correctly. Thanks for the help, but I should always remember just to restart tech first when it acts up.

6

I don't think that you mentioned your version of the IDE and your operating system. That might be useful to know for this type of problems.

Glad that you found a solution.

7

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