hey there, im a student and this Is my first Time coding, I am trying to code my potentiometer to show values on the lcd screen as it is moving. my teacher has written me a code but it stops showing values once it hit its max. so I am trying to get any help on what code to use.
Your copy/paste skills could use a refresher... for now, remove the ticks (') and be sure to copy the whole sketch (you are missing the end... is there one brace missing in this chunk, or a bunch of code un-copied?)
Here is what I guessed it might look like:
#include <Wire.h>
#include "Waveshare_LCD1602_RGB.h"
Waveshare_LCD1602_RGB lcd(16, 2); //16 characters and 2 lines of show
int r, g, b, t = 0;
int max = 0;
const byte inPin = A0;
char sensorvalue [33];
void setup()
{
// put your setup code here, to run once:
Serial.begin(9600); //Set serial baud rate to 9600 bps
pinMode(inPin, INPUT); //Set pin mode
// initialize LCD screen
lcd.init();
lcd.setCursor(0, 0);
lcd.send_string("Waveshare");
}
void loop()
{
// put your main code here, to run repeatedly:
int temp = analogRead(inPin);
if (temp > max)
{
max = temp;
Serial.print("max set to : ");
Serial.println(max);
}
r = (abs(sin(3.14 * t / 180)))255;
g = (abs(sin(3.14(t + 60) / 180)))255;
b = (abs(sin(3.14(t + 120) / 180))) * 255;
t = t + 3;
lcd.setRGB(r, g, b);
delay(150);
itoa (max, sensorvalue, 10);
lcd.setCursor(0, 0);
lcd.send_string("Waveshare");
lcd.setCursor(0, 1);
lcd.send_string(sensorvalue);
}
the variable named "max" gets updated each time variable named "temp" is bigger than max.
If you have adjusted the potentiometer to its max-value the variable named "max" stays" on this value because the if-condition
if (temp > max)
is no longer true
If this code is really from your teacher. Just drop this code.
For displaying the ADC-value of the potentiometer in the code-example posted above there are a lot of unnescessary things.
Can you please give an overview about your programming experience.
The code above would be appropriate if you have learned basics about
what is function setup for
what is funcion loop() for
variables
libraries
if-conditions
Serial
if this is not the case
Take a look into this tutorial:
It is easy to understand and has a good mixture between explaining important concepts and example-codes to get you going. So give it a try and report your opinion about this tutorial.
What do you mean with "currently" ?
A potentiometer is a potentiometer. If the resistance of your potentiometer is too low
it might be that the current flowing is too much for the voltage-regulator of the arduino.
No, all inputs on the analogue input work the same there is no special code you need.
In this case your problem is solved by @StefanL38 in that the software is doing exactly what it is expected to do. If you want it to do any different, then you need to do different things with the numbers you are getting from them, like reset the max variable to zero regularly so that it tracks your pot.
The more often you reset this variable the closer will be the tracking.
Or instead of resetting the variable to zero then subtract a certain value from it, then it will track your pot but hold the maximum value for the time between changing the variable.
If you want more help than just a "oh I'm sorry that it did not work for you"
you have to provide much more and specific information:
what did you try?
clicking on the WOKWI-link with the slider-potentiometer?
with which browser?
clicking on the WOKWI-link with the rotation-potentiometer?
with which browser?
uploading a modifyied code to your real microcontroller ?
posting the complete modified sketch ?
and describing in detail what behaviour the newly uploaded code showed
After reading the short, very general posting, I asked myself: "Is this a dissatisfied and frustrated student who would most like to have working code posted to him?
This is not how this forum works. This forum helps to learn fishing. It does not serve ready to eat fish-meals.
Hi Stefan, I've tried it in Edge and Vivaldi.
Never seen a wokwi before so maybe I'm doing it wrong, but I cant get the pot value to change.
Clicking and dragging with the mouse just moves the pot image.
If you click the button in the middle the simulation will stop
if you click the right button the simulation pauses
The symbols are pretty standard to most play-media devices like blueray-players or spotify-buttons
As long as the simulation runs you can't modify the wiring or the code.
For modify the wiring or the code you have to stop the simulation
best regards Stefan
