Use of Arduino series pressure sensors and detected data displayed by OLED (detailed tutorial)

One 、 The pressure sensor is used alone

1.Hx711 And Arduino MEGA 2560 The wiring of the cable

Arduino MEGA 2560 -------- Hx711 modular
D8 -------------------------------- SCK
D9 -------------------------------- DT
Vcc ------------------------------- Vcc
Gnd ------------------------------ Gnd
D8 and D9 You can see the library file for the wiring of HX711.h Inside HX711_SCK and HX711_DT Change the following numbers to change the wiring , The library file is linked as follows ：

Hx711 modular --------------------- sensor
E+ --------------------------------- red
E- ---------------------------------- black
A- ---------------------------------- white
A+ --------------------------------- green

2.Hx711 And Arduino MEGA 2560 Physical connection of

3.Hx711 And Arduino MEGA 2560 Code for

#include <HX711.h>
float Weight = 0;

void setup()
{
    
  Serial.begin(9600);
  Init_Hx711();
  Serial.print("Welcome to use!\n");
  Get_Maopi();
  delay(3000);
}


void loop()
{
    
  delay(100);
  int x = 0;
  Weight = Get_Weight();  // Calculate the weight of the weight placed on the sensor 
// Serial.print(float(Weight/1000),3); // The serial port displays the weight 
// Serial.print(" kg\n"); // Display units 
// Serial.print("\n"); // Display units 
  delay(200);        // Time delay 1s
  
  x = abs(Weight);
  Serial.print(x);
  Serial.print(" g\n");  // Display units 
 }

Two 、OLED Used alone

1.OLED And Arduino MEGA 2560 attachment

OLED ------------------ Arduino MEGA 2560
Gnd -------------------- Gnd
Vcc --------------------- 3.3V
SCL -------------------- SCL
SDA -------------------- SDA

2.OLED And Arduino MEGA 2560 A physical picture

3.OLED And Arduino MEGA 2560 Code , Show numbers , english , chinese

// Display Chinese and English character program 

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

#define LOGO16_GLCD_HEIGHT 16 // Define the display height 
#define LOGO16_GLCD_WIDTH 16 // Define the display width 

// chinese ： matter  ( Store lattice variables , Use functions display.drawBitmap() Call )
static const unsigned char PROGMEM str_1[] =
{
     
0x00,0x00,0x0C,0x00,0x0E,0x70,0x0E,0x60,0x3E,0xE0,0x3E,0xC0,0x3F,0xFE,0x6F,0xFE,
0x0E,0xFE,0x1F,0xFE,0x7F,0xEC,0xEF,0xCC,0x0F,0xBC,0x0C,0x18,0x0C,0x00,0x00,0x00,
};

// chinese ： United 
static const unsigned char PROGMEM str_2[] =
{
     
0x00,0x00,0x00,0x00,0x00,0x1C,0x3F,0xD8,0x7E,0xF0,0x36,0x3C,0x3F,0xF8,0x36,0x60,
0x3E,0xFE,0x37,0xF0,0x3E,0x70,0xF6,0xF8,0x07,0xDE,0x0F,0x0F,0x0E,0x00,0x00,0x00,
};

// chinese ： network 
static const unsigned char PROGMEM str_3[] =
{
     
0x00,0x00,0x00,0x00,0x00,0x78,0x3F,0xFC,0x18,0x1C,0x1B,0xFC,0x1B,0x7C,0x1F,0xFC,
0x1F,0xFC,0x1F,0xBC,0x1C,0x1C,0x38,0x1C,0x38,0x3C,0x38,0x3C,0x00,0x18,0x00,0x00,
};

#if (SSD1306_LCDHEIGHT != 64)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif

void setup()   
{
                    
  Serial.begin(9600);

  // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3D (for the 128x64)
  // init done
  
  display.clearDisplay(); // Clear the screen 

  // English character display , Direct use display.println or print Just display the string 
  //println Line break ,print Don't wrap 
  display.setTextSize(1);             // Set font size 
  display.setTextColor(WHITE);        // Set the font color white 
  display.setCursor(0,0);             // Set the starting position of the font 
  display.println("Hello, world!");   // Output characters and wrap 
  
  display.setTextColor(BLACK, WHITE); // Set the font black , Font background white  
  display.println(3.141592);          // Output numbers and wrap 
  
  display.setTextSize(2);             // Set font size 
  display.setTextColor(WHITE);        // Set font white 
  display.print("0x");                // The output characters 
  display.println(0xDEADBEEF, HEX);   // Output is ASCII Coded hexadecimal 
  //display.display(); // Show above 
  
  // Chinese character display 
  display.drawBitmap(26, 32, str_1, 16, 16, 1); // In coordinates X:26 Y:16 Display Chinese characters in the position of 
  display.drawBitmap(42, 32, str_2, 16, 16, 1); // In coordinates X:42 Y:16 Chinese character couplets are displayed at the position of 
  display.drawBitmap(58, 32, str_3, 16, 16, 1); // In coordinates X:26 Y:16 The location of the display Chinese character net 
  display.display();                  // Show all cached 
}

void loop() 
{
    

}

3、 ... and 、OLED Used with pressure sensors

1. The wiring is the same as the above single use, so it is not repeated

2. Physical display

3.OLED With the gravity sensor and Arduino MEGA 2560 Code

#include "HX711.h"
float Weight = 0;

// Display Chinese and English character program 
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET -1
//#define TrigPin 2
//#define EchoPin 3

Adafruit_SSD1306 display(OLED_RESET);
//Adafruit_SSD1306 display(128, 64, &Wire, OLED_RESET);// Statement OLED
// One , Two parameters 0.9 " OLED The long model parameters are 128,64, The third parameter defaults to &Wire, Fourth parameter 
// Set reset foot ,-1 Just don't set 

void setup()
{
    
  // pressure 
  Init_Hx711();// initialization HX711 Module connected IO Set up 
  Serial.begin(9600);
  Serial.print("Welcome to use!\n");
  delay(3000);
  Get_Maopi();    // Get fur 

  //oled
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.setTextColor(WHITE);// On pixel illumination 
  display.clearDisplay();// Clear the screen 
  display.setTextSize(2);// Set font size  
}

void loop()
{
    
  int dis;
  Weight = Get_Weight();// Calculate the weight of the weight placed on the sensor 
  Serial.print(float(Weight),3);// The serial port displays the weight 
  Serial.print(" g\n");// Display units 
  Serial.print("\n");// Display units 
  delay(1000);

  dis = Weight;
  display.clearDisplay();// Clear the screen 
  display.setCursor(50,10);// For positioning 
  display.print(dis);
  display.println("g");
  display.drawRect(0, 33, 128, 12, WHITE);// Draw a matrix 
  display.fillRect(2, 35, map(dis, 2, 30, 2, 124), 8, WHITE);
  //map( Values to map , The initial value of the old interval , The final value of the old interval , Initial value between new districts , The final value between new districts ）
  display.display();// Turn on the display 
}

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