Nano_Modbus_Pyranometer_Test

#include <SoftwareSerial.h>
#include <ModbusMaster.h>

#define RX_PIN 2
#define TX_PIN 3

#define SLAVE_ID 2
#define BAUD_RATE 9600

SoftwareSerial modbusSerial(RX_PIN, TX_PIN);
ModbusMaster node;

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

  modbusSerial.begin(BAUD_RATE);
  node.begin(SLAVE_ID, modbusSerial);

  Serial.println("--- Renke Live Radiation Monitor ---");
}

void loop() {
  // Read 6 registers starting at 0x0000
  uint8_t result = node.readHoldingRegisters(0x0000, 6);

  if (result == node.ku8MBSuccess) {
    Serial.print("Reg[0]="); Serial.print(node.getResponseBuffer(0));
    Serial.print(" | Reg[1]="); Serial.print(node.getResponseBuffer(1));
    Serial.print(" | Reg[2]="); Serial.print(node.getResponseBuffer(2));
    Serial.print(" | Reg[3]="); Serial.print(node.getResponseBuffer(3));
    Serial.print(" | Reg[4]="); Serial.print(node.getResponseBuffer(4));
    Serial.print(" | Reg[5]="); Serial.println(node.getResponseBuffer(5));
  } else {
    Serial.print("Read Failed. Error: 0x");
    Serial.println(result, HEX);
  }

  delay(1000);
}