โค้ดทดสอบบอร์ด LARB32 Pro

#include <ModbusMaster.h>
#include <SoftwareSerial.h>
#include <HS3UKA_PCF8574.h>
#include "RTClib.h"

#define PCF8574_ADDRESS 0x20 // ที่อยู่ I2C ของ PCF8574

RTC_DS1307 rtc;
HS3UKA_PCF8574 pcf8574;
SoftwareSerial rs485;

int Button1 = 36;
int Button2 = 39;
int LED = 2;
int Buzzer = 12;
int RO = 35;
int DI = 32;
int EN = 33;

#define ID_meter  0x01
#define Total_of_Reg  6
#define Reg_Volt                0x0000      //  0.
#define Reg_Current             0x0006      //  1.
#define Reg_ActivePower         0x000C      //  2.          
#define Reg_PowerFactor         0x001E      //  3.
#define Reg_Frequency           0x0046      //  4.
#define Reg_TotalActiveEnergy   0x0156      //  5.

uint16_t const Reg_addr[6] = {
  Reg_PowerFactor,
  Reg_PowerFactor,
  Reg_ActivePower,
  Reg_PowerFactor,
  Reg_Frequency,
  Reg_TotalActiveEnergy
};

float DATA_METER [Total_of_Reg] ;

ModbusMaster node;
//01 04 00 00 00 02 71 3F // Test 30001
//------------------------------------------------
// Convent 32bit to float
//------------------------------------------------
float HexTofloat(uint32_t x) {
  return (*(float*)&x);
}

uint32_t FloatTohex(float x) {
  return (*(uint32_t*)&x);
}
//------------------------------------------------

void preTransmission()
{
  digitalWrite(EN, 1);
}

void postTransmission()
{
  digitalWrite(EN, 0);
}

float Read_Meter_float(char addr , uint16_t  REG) {
  float i = 0;
  uint8_t j, result;
  uint16_t data[2];
  uint32_t value = 0;
  node.begin(addr, rs485);
  result = node.readInputRegisters (REG, 0x04); ///< Modbus function 0x04 Read Input Registers
  delay(500);
  if (result == node.ku8MBSuccess) {
    for (j = 0; j < 2; j++)
    {
      data[j] = node.getResponseBuffer(j);
    }
    value = data[0];
    value = value << 16;
    value = value + data[1];
    i = HexTofloat(value);
    //Serial.println("Connec modbus Ok.");
    return i;
  } else {
    //Serial.print("Connec modbus fail. REG >>> "); Serial.println(REG, HEX); // Debug
    delay(1000); 
    return 0;
  }
}

void GET_METER() {     // Update read all data
  delay(1000);                              // เคลียบัสว่าง 
    for (char i = 0; i < Total_of_Reg ; i++){
      DATA_METER [i] = Read_Meter_float(ID_meter, Reg_addr[i]);//แสกนหลายตัวตามค่า ID_METER_ALL=X
    } 
}

void setup() {
  pinMode(Button1,INPUT);
  pinMode(Button2,INPUT);
  pinMode(LED,OUTPUT);
  pinMode(Buzzer,OUTPUT);
  pinMode(EN, OUTPUT);
  
  delay(1000);
  Serial.begin(115200);
  Serial.println("Start Testing");

  if (!pcf8574.begin(PCF8574_ADDRESS)) {
    Serial.println("Couldn't find PCF8574");
    while (1);
  }
  
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    while (1) delay(10);
  }

  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running, let's set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }

  rs485.begin(2400, SWSERIAL_8N1, RO, DI);
  digitalWrite(EN, 0);
  node.preTransmission(preTransmission);
  node.postTransmission(postTransmission);
  Serial.println("Ready!");
}

void loop() {
  
  if(digitalRead(Button1)==LOW){
    DateTime now = rtc.now();
    Serial.print(now.year(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.day(), DEC);
    Serial.print(' ');
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();

    Serial.println("LED");
    digitalWrite(LED,HIGH);
    delay(1000);
    digitalWrite(LED,LOW);

    Serial.println("Buzzer");
    digitalWrite(Buzzer,HIGH);
    delay(1000);
    digitalWrite(Buzzer,LOW);

    for (uint8_t p=0; p<=5; p++) {
      pcf8574.digitalWrite(p, LOW);  // turn LED on by sinking current to ground
      delay(500);
    }
    
    Serial.println();
    float total = Read_Meter_float(ID_meter,Reg_TotalActiveEnergy);
    Serial.print("Total Active Energy = "); Serial.print(total);Serial.println(" kWh");

    digitalWrite(Buzzer,HIGH);
    delay(100);
    digitalWrite(Buzzer,LOW);
    delay(100);
    digitalWrite(Buzzer,HIGH);
    delay(100);
    digitalWrite(Buzzer,LOW);
    delay(100);
    delay(1000);
  }

  if(digitalRead(Button2)==LOW){
    digitalWrite(LED,LOW);

    digitalWrite(Buzzer,HIGH);
    delay(200);
    digitalWrite(Buzzer,LOW);
    delay(200);

    for (uint8_t p=0; p<=5; p++) {
      pcf8574.digitalWrite(p, HIGH);  // turn LED on by sinking current to ground
    }
  }
}