Example Code for Arduino-Distance and Temperature Measurement

Software Preparation

Please download the Library First

URM_RS485 library on github

Sample Code

#include "Arduino.h"

// Include application, user and local libraries
#include "URM_RS485.h"

#define Rs485TriggerPin 2               //the pin to select whether the RS485 is output or input
#define DefaultBaudrate 19200UL         //the Default Baudrate for the Urm06_485
#define DefaultAddress 0x11             //the Default Address for the Urm06_485
#define DefaultMaxDistance (-1)         //the Default Max Distance for the Urm06_485. "-1" means there is no Max Distance limitation. Set the Max Distance can limit the Distance range and speed up the detection.

#define CustomizedTimeOutDuration 500   //Time Out Duration can be Customized in "ms" unit

// Define variables and constants
URM_RS485 urm(Serial,Rs485TriggerPin);  //select the Serial port for communication with Urm_485 sensor

void onTimeOut()
{
  //If there is no reply from Urm_485 lasting for 1 second, this function will run. The time duration can be Customized
  //TODO write your code here:
  Serial.println("onTimeOut");

}
void onRequestDistance(byte theAddress, int theDistance)
{
  //If received Distance reply, this function will run.
  //theDistance is in "mm" unit
  //TODO write your code here:
  Serial.print("Address:");
  Serial.println(theAddress);
  Serial.print("Distance:");
  Serial.print(theDistance);
  Serial.println("mm");

}
void onRequestTemperature(byte theAddress, float theTemperature)
{
  //If received Temperature reply, this function will run.
  //theTemperature is in "°C" unit
  //TODO write your code here:
  Serial.print("Address:");
  Serial.println(theAddress);
  Serial.print("Temperature:");
  Serial.print(theTemperature);
  Serial.println(" C");

}
void onRequestMaxDistance(byte theAddress, int theMaxDistance)
{
  //If received Max Distance reply, this function will run.
  //theMaxDistance is in "mm" unit
  //TODO write your code here:
  Serial.print("Address:");
  Serial.println(theAddress);
  Serial.print("MaxDistance:");
  Serial.print(theMaxDistance);
  Serial.println("mm");
}
void onSetMaxDistance(byte theAddress, boolean isOperationSuccess)
{
  //After setting the Max Distance and getting a reply, this function will run.
  //Set the Max Distance can limit the Distance range and speed up the detection.
  //TODO write your code here:
  Serial.print("Address:");
  Serial.println(theAddress);
  Serial.print("SetMaxDistance:");
  if (isOperationSuccess) {
    Serial.println("Success");
  }
  else{
    Serial.println("Failure");
  }
}
void onSetBaudrate(byte theAddress, boolean isOperationSuccess)
{
  //After setting the Baudrate and getting a reply, this function will run.
  //TODO write your code here:
  Serial.print("Address:");
  Serial.println(theAddress);
  Serial.print("SetBaudrate:");
  if (isOperationSuccess) {
    Serial.println("Success");
  }
  else{
    Serial.println("Failure");
  }
}
void onSetAddress(byte theAddress, boolean isOperationSuccess)
{
  //After setting the Address and getting a reply, this function will run.
  //TODO write your code here:
  Serial.print("Address:");
  Serial.println(theAddress);
  Serial.print("SetAddress:");
  if (isOperationSuccess) {
    Serial.println("Success");
  }
  else{
    Serial.println("Failure");
  }
}
void onWrongStack()
{
  //If received wrong command, this function will run.
  //TODO write your code here:
  Serial.println("WrongStack");
}

//Run the proper function based on the different kinds of states
void commandProcess()
{
  if (urm.available()) {
    switch (urm.callBackState) {
      case URM_RS485::OnTimeOut:
        onTimeOut();
        break;
      case URM_RS485::OnRequestDistance:
        onRequestDistance(urm.receivedAddress, urm.receivedContent);
        break;
      case URM_RS485::OnRequestTemperature:
        onRequestTemperature(urm.receivedAddress, urm.receivedContent/10.0);
        break;
      case URM_RS485::OnRequestMaxDistance:
        onRequestMaxDistance(urm.receivedAddress, urm.receivedContent);
        break;
      case URM_RS485::OnSetMaxDistance:
        onSetMaxDistance(urm.receivedAddress, urm.receivedContent);
        break;
      case URM_RS485::OnSetBaudrate:
        onSetBaudrate(urm.receivedAddress, urm.receivedContent);
        break;
      case URM_RS485::OnSetAddress:
        onSetAddress(urm.receivedAddress, urm.receivedContent);
        break;
      case URM_RS485::OnWrongStack:
        onWrongStack();
        break;
      default:
        break;
    }
  }
}

// Add setup code
void setup()
{
  urm.begin(DefaultBaudrate);
}

// Add loop code
void loop()
{
  commandProcess();

  static unsigned long sendingTimer=millis();
  if (millis()-sendingTimer>=1000) {
    sendingTimer=millis();

    //Each function below from URM_RS485 returns the state whether RS485 Bus is busy or not.
    //If the Bus is busy, wait until the bus is released.
    while(!urm.requestDistance(DefaultAddress)) {
      commandProcess();
    }
//
//    while(!urm.requestTemperature(DefaultAddress)) {
//      commandProcess();
//    }
//
//    while(!urm.requestMaxDistance(DefaultAddress)) {
//      commandProcess();
//    }
//
//    while(!urm.setAddress(DefaultAddress)) {
//      commandProcess();
//    }
//
//    while(!urm.setBaudrate(DefaultAddress, DefaultBaudrate)) {
//      commandProcess();
//    }
//
//    while(!urm.setMaxDistance(DefaultAddress, DefaultMaxDistance)) {
//      commandProcess();
//    }
//


//Time Out Duration can be Customized
//    while(!urm.requestDistance(DefaultAddress, CustomizedTimeOutDuration)) {
//      commandProcess();
//    }
//
//    while(!urm.requestTemperature(DefaultAddress, CustomizedTimeOutDuration)) {
//      commandProcess();
//    }
//
//    while(!urm.requestMaxDistance(DefaultAddress, CustomizedTimeOutDuration)) {
//      commandProcess();
//    }
//
//    while(!urm.setAddress(DefaultAddress, CustomizedTimeOutDuration)) {
//      commandProcess();
//    }
//
//    while(!urm.setBaudrate(DefaultAddress, DefaultBaudrate, CustomizedTimeOutDuration)) {
//      commandProcess();
//    }
//
//    while(!urm.setMaxDistance(DefaultAddress, DefaultMaxDistance, CustomizedTimeOutDuration)) {
//      commandProcess();
//    }

  }
}