#include <hd44780.h>#include <hd44780ioClass/hd44780_I2Cexp.h>
#include <Wire.h>
hd44780_I2Cexp lcd(0x27, 16, 2); // Change the I2C address if necessary
const int trigPin = 2;
void setup() {
void loop() {
duration = pulseIn(echoPin, HIGH);
lcd.setCursor(0, 1); // Set the cursor to the second line
delay(500); // Update the display every half second
Problem in 6th line not working
Can someone please make me a new code or help me with the same code please
Please post your sketch, using code tags when you do. This prevents parts of it being interpreted as HTML coding and makes it easier to copy for examination
In my experience the easiest way to tidy up the code and add the code tags is as follows
What does this mean exactly ?
How is it "not working" ?
Read the documentation for pulseln and see what is returned if there is NO ECHO after a one second wait.
problemmaker:
const int trigPin = 2;
That only tells the compiler that trigPin is pin number 2, it does nothing else.
Your problem is not unexpected, and your wiring may be the root cause. Since hardware is involved, it’s crucial to provide an accurate, annotated schematic of your circuit as it is currently wired. Please note that Fritzing diagrams are not considered proper schematics; they are wiring diagrams and are often not helpful for troubleshooting.
What to Include:
Annotated Schematic: Show all connections, including power, ground, and power sources. This helps us understand how your circuit is set up and identify any potential issues.Technical Information Links: Provide links to technical documentation for each hardware device used in your setup. Avoid links to sales sites like Amazon, as they usually lack the necessary technical details. We need complete specifications to help you effectively.Additional Information Needed: If the above details are incorrect, more information is required. Tell us what hardware and software you are using, the format of any data (like map data), and how your system determines its position. For example, if your project involves a robot, describe how it navigates and what computers are involved.
Why This Matters:
We have no way of knowing the specifics of your setup unless you provide that information. Clear and detailed descriptions enable us to offer the most accurate help possible. Without these details, it’s difficult to diagnose and solve the issues you're experiencing.
@problemmaker
The library comes with extensive documentation down under the Documentation sketch that can be accessed directly from the Arduino IDE.
There is also a wiki on the github repository.https://github.com/duinoWitchery/hd44780/wiki
And a direct link to the hd44780_I2Cexp i/o class wiki:https://github.com/duinoWitchery/hd44780/wiki/ioClass:-hd44780_I2Cexp
--- bill
The command
lcd.begin(); // Initialize the LCD is terminated by Arduino IDE Software
Copied error messages given below
FQBN: arduino:avr:uno
Detecting libraries used...
Compilation error: no matching function for call to 'LiquidCrystal_I2C::begin()'
Sir @bperrybap PLS HELP ME
I have that library (hd44780) and it is also included in the code pls I need help asap @bperrybap
-Problemmaker
Sir I forgot to tell I m new at Arduino Software and also I lack of Experience
I m making a Distance Meter
Components used-Breadboard, LCD Display 16*2, Ultrasonic Sensor Model HC-SR04, Arduino Uno and Jumper Wires Pls help ASAP
Still the lcd.begin() command isnt working I need help @bperrybap
Please follow the advice given in the link below when posting code, in particular the section entitled 'Posting code and common code problems'code tags https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum
Please post your full sketch, using code tags when you do. This prevents parts of it being interpreted as HTML coding and makes it easier to copy for examination
In my experience the easiest way to tidy up the code and add the code tags is as follows
I m sorry for not using code tags. I read the advice. I apologies for the inconvenience caused by me.
Here is the Code
#include <jm_LiquidCrystal_I2C.h>
#include <jm_Scheduler.h>
#include <jm_Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <LiquidCrystal_74HC595.h>
#include <LCD-I2C.h>
#include <LCD_BacklightRGB.h>
#include <DFRobot_RGBLCD1602.h>
#include <LiquidCrystal.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#define trigPin 7 //Sensor Echo pin connected to Arduino pin 13
#define echoPin 6 //Sensor Trip pin connected to Arduino pin 12
void setup()
{
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
lcd.begin();
lcd.backlight();
lcd.clear();
lcd.setCursor(4,0);
lcd.print("Tech Trends");
delay(2000);
lcd.setCursor(0,0); //Set LCD cursor to upper left corner, column 0, row 0
lcd.print("Target Distance:"); //Print Message on First Row
}
void loop()
{
long duration, distance;
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
lcd.setCursor(0,1); //Set cursor to first column of second row
lcd.print(" "); //Print blanks to clear the row
lcd.setCursor(0,1); //Set Cursor again to first column of second row
lcd.print(distance); //Print measured distance
lcd.print(" cm"); //Print your units.
delay(250); //pause to let things settle
}
It looks like you have created a mess.
The header files you have used are for libraries that are not all for the same type of LCD device. Again, you don't want to do this.
Your main issue is that you have put multiple header files for multiple LCD libraries in your code and you code is not using the correct API for any of them.
My suggestion, is
pick one and only one LCD library.
go read the documentation for that LCD library
get one of its minimal examples working. (i.e. perhaps HelloWorld etc...)
It isn't clear what LCD device and interface you actually have.
If you have a hd44780 type LCD with a PCF8574 based backpack,#6 I2CexpDIag , to check things out to make sure everything is working properly. No other LCD library has anything like that.
If you don't want to use the hd44780 library then my other recommendation would be use the LiquidCrystal_I2C library.
Unfortunately, uninstalling libraries is a total PITA because for some odd reason the Arduino dev team doesn't want to allow removing libraries from the IDE.
You could consider to clean up this ugly post by putting the error messages into code tags as well. You can edit any of your own posts!
rsmls
October 16, 2024, 5:15pm
18
problemmaker:
Components used-Breadboard, LCD Display 16*2, Ultrasonic Sensor Model HC-SR04, Arduino Uno and Jumper Wires Pls help ASAP
Additional info needed:
Detailed information on esp the LCD display module
Schematic and/or wiring diagram
Clear photos of how you have everything wired up.
A clear description of what 'isnt working' entails.
"Pls ASAP" and all that.
Also, I'd recommend starting with ONLY the Arduino and the LCD and trying to get it to print Hello World. If that works, start adding the other components one by one.
Also, see the advice of @bperrybap concerning libraries. You need only a single library for the LCD.
Thanks! I will Try the given options By Sir @bperrybap , and Sir @rsmls
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#define trigPin 7 //Sensor Echo pin connected to Arduino pin 13
#define echoPin 6 //Sensor Trip pin connected to Arduino pin 12
void setup()
{
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
lcd.begin();
lcd.backlight();
lcd.clear();
lcd.setCursor(4,0);
lcd.print("Tech Trends");
delay(2000);
lcd.setCursor(0,0); //Set LCD cursor to upper left corner, column 0, row 0
lcd.print("Target Distance:"); //Print Message on First Row
}
void loop()
{
long duration, distance;
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
lcd.setCursor(0,1); //Set cursor to first column of second row
lcd.print(" "); //Print blanks to clear the row
lcd.setCursor(0,1); //Set Cursor again to first column of second row
lcd.print(distance); //Print measured distance
lcd.print(" cm"); //Print your units.
delay(250); //pause to let things settle
}
Above is my new code. I only used LiquidCrystal_I2C.h library and Wire.h library. But its not working same error.
Copied error Messages below: -
FQBN: arduino:avr:uno
Detecting libraries used...
Using library Wire at version 1.0 in folder: C:\Users\risha\AppData\Local\Arduino15\packages\arduino\hardware\avr\1.8.6\libraries\Wire
Compilation error: no matching function for call to 'LiquidCrystal_I2C::begin()'
What should I do