[Arduino source code for M30]-02 read all energy meter data

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Code:

#include <ModbusMaster.h>
#include <arduino.h>
#include "HardwareSerial.h"
ModbusMaster node;
HardwareSerial my485Serial(2);

#define CHANNEL     0

String temp="";
void read_485(){
  while(my485Serial.available()>0)
  {
    temp = my485Serial.readString();   //read one data then delete it from buffer
     Serial.println(temp);
     //delay(100);
  }
  temp="";
}

void setup() {
  // put your setup code here, to run once:

  Serial.begin(115200);
  my485Serial.begin(115200,SERIAL_8N1,32,33);///rx:32  tx:33
  while(my485Serial.read()>0){}
  node.begin(1,my485Serial);
 
}

void loop() {
  // put your main code here, to run repeatedly:
  //first chip BL0910 address:100  second chip BL0910 address:200  third chip BL0910 address:300  every address have 35 bytes data
  if(0 == node.readHoldingRegisters(100,35))
  {
      Serial.print("register value: ");
      for(int i=0;i<35;i++)
      {
        Serial.print(node.getResponseBuffer(i));
        Serial.print(" ");
      }
  }
  Serial.println(" ");
  Serial.println("next circle!");
  delay(500);
}