Delta_G:
Improve what program. You haven't shown us any program. I know your english isn't good, but hopefully you understand that you won't get anywhere here without posting your code. This is the last time I am asking. If your next post doesn't include the code you want help with then I will simply ignore you from now on.
So sorry.
I'm sorry to bother you !
My code:
#include <Keypad.h>
/* LOADCELL VS LCD*/
#include "HX711.h" //You must have this library in your arduino library folder
#include <LiquidCrystal.h>
/*********** LOAD CELL ************/
#define DOUT 3
#define CLK 2
HX711 scale(DOUT, CLK);
/*********** KEYPAD************/
volatile int firstnumber=99; // used to tell how many numbers were entered on keypad
volatile int secondnumber=99;
volatile int thirdnumber=99;
const byte rows = 4; //sô´ ha`ng
const byte columns = 4; //sô´ cô?t
int holdDelay = 700; //Thoi gian trê~ dê? xem la nhâ´n 1 nu´t nham tra´nh nhiê~u int n = 3; // int state = 0; //nê´u state =0 ko nhâ´n,state =1 nhâ´n thoi gian nho? , state = 2 nhâ´n giu~ lâu
char key = 0;
//Ăi?nh nghi~a ca´c gia´ tri? tra? vĂŞ`
char keys[rows][columns] =
{
{'1', '2', '3', 'A'},
{'4', '5', '6', 'B'},
{'7', '8', '9', 'C'},
{'*', '0', '#', 'D'},
};
byte rowPins[rows] = {28, 30, 32, 34}; //Ca´ch nô´i chân vo´i Arduino
byte columnPins[columns] = {36, 38, 40, 42};
//cĂ i d?t thu vi?n keypad
Keypad keypad = Keypad(makeKeymap(keys), rowPins, columnPins, rows, columns);
/*********** LCD ************/
LiquidCrystal lcd(9, 8 , 7, 6, 5, 4);
//Change this calibration factor as per your load cell once it is found you many need to vary it in thousands
float calibration_factor = -96650; //-106600 worked for my 40Kg max scale setup
//=============================================================================================
// SETUP
//=============================================================================================
void setup() {
Serial.begin(9600);
lcd.begin(16,2);
lcd.print(" CAN DINH LUONG");
delay (1000);
lcd.setCursor (0, 1);
lcd.print ("Khoi luong");
lcd.setCursor (14, 1);
lcd.print ("Gr");
Serial.println("Thu HX711");
Serial.println("Truoc khi set ti le:");
Serial.print("doc: \t\t");
Serial.println(scale.read());
Serial.print("doc gia tri trung binh: \t\t");
Serial.println(scale.read_average(20));
Serial.print("lay gia tri: \t\t");
Serial.println(scale.get_value(5));
Serial.print("lay don vi: \t\t");
Serial.println(scale.get_units(5), 1);
scale.set_scale(-169.44444);
scale.tare();
Serial.println("Sau khi thiet lap ti le:");
Serial.print("doc : \t\t");
Serial.println(scale.read());
Serial.print("doc gia tri trung binh : \t\t");
Serial.println(scale.read_average(20));
Serial.print("lay gia tri: \t\t");
Serial.println(scale.get_value(5));
Serial.print("lay don vi: \t\t");
Serial.println(scale.get_units(5), 1);
Serial.println();
Serial.println("DOC GIA TRI:");
}
void loop() {
/* LOADCELL*/
Serial.print("doc 1 lan:\t");
Serial.print(scale.get_units(), 1);
Serial.print("\t| trung binh 10 lan doc:\t");
Serial.println(scale.get_units(10), 1);
/* SET VALUE KEYPAD AND DISPLAY LCD*/
char key = keypad.getKey ();
if (key != NO_KEY)
{ // If keypad button pressed check which key it was
switch (key) {
case '1':
checknumber(1);
break;
case '2':
checknumber(2);
break;
case '3':
checknumber(3);
break;
case '4':
checknumber(4);
break;
case '5':
checknumber(5);
break;
case '6':
checknumber(6);
break;
case '7':
checknumber(7);
break;
case '8':
checknumber(8);
break;
case '9':
checknumber(9);
break;
case '0':
checknumber(0);
break;
case '*':
deletenumber();
break;
case '#':
break;
}
}
}
void checknumber(int x){
if (firstnumber == 99)
{ // Check if this is the first number entered
firstnumber=x;
String displayvalue = String(firstnumber); // Transform int to a string for display
lcd.setCursor(9,1);
lcd.print(displayvalue); // Redraw Nokia lcd
}
else {
if (secondnumber == 99) { // Check if it's the second number entered
secondnumber=x;
String displayvalue = (String(firstnumber) + String(secondnumber));
lcd.setCursor (9,1);
lcd.print (displayvalue);
} else { // It must be the 3rd number entered
thirdnumber=x;
String displayvalue = (String(firstnumber) + String(secondnumber) + String(thirdnumber));
lcd.setCursor (9,1);
lcd.print (displayvalue);
}
}
}
void deletenumber() { // Used to backspace entered numbers
if (thirdnumber !=99) {
String displayvalue = (String(firstnumber) + String(secondnumber));
lcd.setCursor (9,1);
lcd.print (displayvalue);
thirdnumber=99;
}
else {
if (secondnumber !=99) {
String displayvalue = String(firstnumber);
lcd.setCursor (9,1);
lcd.print (displayvalue);
secondnumber=99;
}
else {
if (firstnumber !=99) {
String displayvalue = "";
lcd.setCursor (9,1);
lcd.print (displayvalue);
firstnumber=99;
}
}
}
}
/* CONTROL 2 STEP MOTOR*/
:"( :"(
Not quite as we like it but that is a next step.