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);
}
![[Image: M30-1_01.jpg]](https://www.kincony.com/images/M30/M30-1_01.jpg)
![[Image: M30-1_02.jpg]](https://www.kincony.com/images/M30/M30-1_02.jpg)
![[Image: M30-1_03.jpg]](https://www.kincony.com/images/M30/M30-1_03.jpg)
![[Image: M30-1_04.jpg]](https://www.kincony.com/images/M30/M30-1_04.jpg)
![[Image: M30-1_05.jpg]](https://www.kincony.com/images/M30/M30-1_05.jpg)
