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Full Discussion: Very Basic Arduino Uno Board Testing
Top Forums Programming Very Basic Arduino Uno Board Testing Post 303042294 by Neo on Friday 20th of December 2019 10:29:42 AM
Old 12-20-2019
Here is a quick test with the same Arduino Uno with the I2C bus and the HC-SRO4 Ultrasonic Ranging Module

Very Basic Arduino Uno Board Testing-img_8698jpg


Very Basic Arduino Uno Board Testing-img_8693jpg


and the simple test sketch:

Code:
/*
  1602 LCD Display with I2C and HC-SRO4 Demo
  Created by Neo December 2019
  https://www.unix.com
*/
#include <LiquidCrystal_I2C.h>
const int i2c_addr = 0x27;    // bus address from LCD display
LiquidCrystal_I2C lcd(i2c_addr, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
const int trigPin = 9;    //  HC-SRO4 trig
const int echoPin = 10;   //  HC-SRO4 echo
const int maxRange = 400; //  HC-SRO4 max range in cm
const int minRange = 2;   //  HC-SRO4 min range in cm
long duration;
float distanceCm, distanceInch;
void setup()
{
    lcd.begin(16, 2); // Initializes LCD screen and specifies chars (16) and rows (2)
    pinMode(trigPin, OUTPUT);
    pinMode(echoPin, INPUT);
}
void loop()
{
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    duration = pulseIn(echoPin, HIGH);
    distanceCm = duration * 0.034 / 2;
    distanceInch = duration * 0.0133 / 2;
    // Set range of HC-SRO4
    if (distanceCm > maxRange || distanceCm < minRange)
    {
        distanceCm = 0;
        distanceInch = 0;
    }
    //first row
    lcd.setCursor(0, 0); // Sets the cursor location
    lcd.print("Dist(cm): ");
    if (distanceCm > 0)
    {
        lcd.print(distanceCm, 1);
        lcd.print("     ");
    }
    else
    {
        lcd.print("         "); // easy clear :)
    }
    // second row
    lcd.setCursor(0, 1);
    lcd.print("Dist(in): ");
    if (distanceCm > 0)
    {
        lcd.print(distanceInch, 1);
        lcd.print("    ");
    }
    else
    {
        lcd.print("         "); // easy clear :)
    }

    delay(200);
}

 

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LEARN ABOUT DEBIAN

procmeter3-lcd

PROCMETER3-LCD(1)					      General Commands Manual						 PROCMETER3-LCD(1)

NAME

       procmeter3-lcd - A system monitoring program with LCDproc display.

SYNOPSIS

       procmeter3-lcd [-h|--help] [--rc=<filename>] [--...]  [...]

DESCRIPTION

       ProcMeter  Displays one or more pieces of information about the operating system and other resources.  Most of the information that is dis-
       played comes from the /proc filesystem.	The program is modular and very configurable.

OPTIONS

       The command line options are described below.

       -h     Provides a help message listing the available outputs.  This will be different for different computers depending on the Linux kernel
	      version that is being used and the hardware/software that is configured.

       --rc=<filename>
	      Load the specified .procmeterrc file in stead of the searching in the usual places.

       --...  A  list  of  configuration file options that will override the values in the .procmeterrc file.  The format of these options is (for
	      example) --LCD.host=localhost which is equivalent to the entry in the .procmeterrc file of

	       [LCD]
	       host = localhost

	      All spaces around the equal sign must be removed and if spaces are required in the value on the right hand side then quotes must	be
	      used around the entire command line option.

       ...    A  list  of  names of outputs that are to be displayed.  This can include any of the outputs that are available (see the -h option).
	      For the CPU usage is in a module named Statistics with an output named CPU and there are graph (-g), text (-t) and bar (-b) options.
	      To display the CPU usage graph you would use the command line option Statistics.CPU-g

USAGE

       When  started  the program will display on an attached LCD display using the LCDd daemon program (from http://lcdproc.omnipotent.net).  The
       outputs that are displayed are those from the command line and those from the .procmeterrc configuration file.

MODULES

       The modules that are available for procmeter3-lcd are described in the procmeter3_modules(1) manual page.

SEE ALSO

       procmeterrc(5) procmeter3_modules(1)

AUTHOR

       Andrew M. Bishop 1998-2007

								   July 3, 2010 						 PROCMETER3-LCD(1)
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