[Arduino]電子秤平 重量感測條+HX711AD模組

※此重量感測條為3kg

接法:

重量感測條-->HX711-->ARDUINO

重量感測條   HX711      

紅------------>E               

黑------------>E                

白------------>A-                

綠------------>A+     

        

HX711          ARDUINO

GND-------->GND

DT----------->3

SCK--------->2

VCC-------->5V

Main code

#include "HX711.h"   
HX711 HX711_CH0(2, 3, 750); //SCK,DT,GapValue
//SCK引腳用於arduino和HX711模塊通訊的時序提供
//DT引腳用於從HX711讀取AD的數據
//GapValue用於校準輸出的重量值，如果數值偏大就加大該值，如果數據偏小就減小該值

int LED = 13;   //ARDUINO LED燈，亮起時代表初始化完成可以負重
long Weight = 0;    //定義一個變量用於存放承重的重量，單位為g



void setup()
{
  pinMode(LED, OUTPUT);       //設定LED是輸出引腳
  digitalWrite(LED, LOW);     //LED熄滅

  Serial.begin(9600);           //設定串口輸出波特率

  HX711_CH0.begin();          //讀取傳感器重量
  delay(3000);                //延時3s用於傳感器穩定
  HX711_CH0.begin();          //重新讀取傳感器支架毛重用於後續計算

  digitalWrite(LED, HIGH);    //板載LED點亮，說明可以承重
}

void loop()
{

    Weight = HX711_CH0.Get_Weight();    //當前傳感器重量，該重量已經扣除支架重量
    Serial.print(Weight);     //串口輸出當前重量
    Serial.println(" g");     //單位為g
    delay(1000);  

}

調用函式庫:
HX711.h

	#ifndef __HX711__H__
	#define __HX711__H__
	#include <Arduino.h>
	class HX711
	{
	public:
	HX711(int SCK_PIN,int DT_PIN,float GapValueIn=44);
	long Get_Weight();
	void begin();
	int Pressed(int AlarmValue);
	int HX711_SCK;
	int HX711_DT;
	float ValueGap;
	long HX711_Buffer;
	long Weight_Maopi;
	long Weight_Shiwu;
	int CurrentAlarm;
	private:
	void Get_Maopi();
	unsigned long HX711_Read();
	};
	#endif

view raw HX711.h hosted with ❤ by GitHub

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HX711.cpp

	#include "hx711.h"
	HX711::HX711(int SCK_PIN,int DT_PIN,float GapValueIn)
	{
	HX711_SCK = SCK_PIN;
	HX711_DT = DT_PIN;
	ValueGap = GapValueIn;
	}
	//****************************************************
	//初始化HX711
	//****************************************************
	void HX711::begin()
	{
	pinMode(HX711_SCK, OUTPUT);
	pinMode(HX711_DT, INPUT);
	Get_Maopi();
	}
	int HX711::Pressed(int AlarmValue)
	{
	if(Get_Weight() >= AlarmValue && CurrentAlarm == 0)
	{
	CurrentAlarm = 1;
	return 1;
	}
	else if(Get_Weight() < AlarmValue)
	{
	CurrentAlarm = 0;
	return 0;
	}
	return 0;
	}
	//****************************************************
	//獲取毛皮重量
	//****************************************************
	void HX711::Get_Maopi()
	{
	Weight_Maopi = HX711_Read();
	}
	//****************************************************
	//稱重
	//****************************************************
	long HX711::Get_Weight()
	{
	HX711_Buffer = HX711_Read();
	Weight_Shiwu = HX711_Buffer;
	Weight_Shiwu = Weight_Shiwu - Weight_Maopi; //獲取實物的AD采樣數值。
	Weight_Shiwu = (long)((float)Weight_Shiwu/ValueGap+0.05);
	return Weight_Shiwu;
	}
	//****************************************************
	//讀取HX711
	//****************************************************
	unsigned long HX711::HX711_Read() //增益128
	{
	unsigned long count;
	unsigned char i;
	bool Flag = 0;
	digitalWrite(HX711_DT, HIGH);
	delayMicroseconds(1);
	digitalWrite(HX711_SCK, LOW);
	delayMicroseconds(1);
	count=0;
	while(digitalRead(HX711_DT));
	for(i=0;i<24;i++)
	{
	digitalWrite(HX711_SCK, HIGH);
	delayMicroseconds(1);
	count=count<<1;
	digitalWrite(HX711_SCK, LOW);
	delayMicroseconds(1);
	if(digitalRead(HX711_DT))
	count++;
	}
	digitalWrite(HX711_SCK, HIGH);
	delayMicroseconds(1);
	digitalWrite(HX711_SCK, LOW);
	delayMicroseconds(1);
	count ^= 0x800000;
	return(count);
	}

view raw HX711.cpp hosted with ❤ by GitHub

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