Back again. I am playing around with a Sainsmart Uno & LCD KeyPadShield. I am attempting to mix the serial data (range finding data, with the LCD "Hello World" code. Of course I am failing. Is there a tweek that mixes the serial data with the LCD dispayed data I should be using?
Both of the snips work, but they dont work together. Help Please.
// include the library code:
//Not My Code, Example code being mixed
#include <LiquidCrystal.h>
#define trigPin A4
#define echoPin A5
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
void setup() {
Serial.begin (115200);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
}
void loop() {
int duration, distance;
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
if (distance >= 400 || distance <= 0){
Serial.println("Out of range");
}
else {
Serial.print(distance);
Serial.println(" cm");
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);
}
}
And open source working code for the combo of Uno, Sainsmart LCD Screen, & SR04 sonic range finder
#include <LiquidCrystal.h>
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
int pingPin = A4;
int inPin = A5;
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
}
void loop(){
// establish variables for duration of the ping,
// and the distance result in inches and centimeters:
long duration, inches, cm;
// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:
pinMode(pingPin, OUTPUT);
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(10);
digitalWrite(pingPin, LOW);
// The same pin is used to read the signal from the PING))): a HIGH
// pulse whose duration is the time (in microseconds) from the sending
// of the ping to the reception of its echo off of an object.
pinMode(inPin, INPUT);
duration = pulseIn(inPin, HIGH);
// convert the time into a human readable distance
cm = microsecondsToCentimeters(duration);
// if distance is too large (probably not being measured properly)
// will discard the result.
if (cm > 400){
lcd.clear();
lcd.setCursor(0,0);
lcd.print("Nothing detected");
}
else {
// clear lcd content
lcd.clear();
// set the cursor to column 0, line 0
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 0);
lcd.print("Object detected ");
lcd.setCursor(0, 1);
lcd.print(cm);
lcd.print("cm away!");
}
delay(500);
}
long microsecondsToInches(long microseconds){
// According to Parallax's datasheet for the PING))), there are
// 73.746 microseconds per inch (i.e. sound travels at 1130 feet per
// second). This gives the distance travelled by the ping, outbound
// and return, so we divide by 2 to get the distance of the obstacle.
return microseconds / 74 / 2;}
long microsecondsToCentimeters(long microseconds){
// The speed of sound is 340 m/s or 29 microseconds per centimeter.
// The ping travels out and back, so to find the distance of the
// object we take half of the distance travelled.
return microseconds / 29 / 2;}