URM37 Ultrasonic Sensor

Using Arduino Project Guidance
#1 
/*
	DistanceBySoftwareSerial.pde - URM 37 Control Library Version 2.0.0
 	Author: Miles Burton, miles@mnetcs.com
 	Copyright (c) 2009 Miles Burton All Rights Reserved
 
 	This library is free software; you can redistribute it and/or
 	modify it under the terms of the GNU Lesser General Public
 	License as published by the Free Software Foundation; either
 	version 2.1 of the License, or (at your option) any later version.
 
 	This library is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 	Lesser General Public License for more details.
 
 	You should have received a copy of the GNU Lesser General Public
 	License along with this library; if not, write to the Free Software
 	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 */

#include "URMSerial.h"


// The measurement we're taking
#define DISTANCE 1
#define TEMPERATURE 2
#define ERROR 3
#define NOTREADY 4
#define TIMEOUT 5

URMSerial urm;

void setup() {

  Serial.begin(9600);                  // Sets the baud rate to 9600
  urm.begin(6,7,9600);                 //RX Pin, TX Pin, Baud Rate   <<<<<<<<HERE<<<<<<<<<<
  Serial.println("URM37 Library by Miles Burton - Distance. Version 2.0");   // Shameless plug 
}
  
void loop()
{
  Serial.println("Measurement: ");
  Serial.println(getMeasurement());  // Output measurement
}


int value; // This value will be populated
int getMeasurement()
{
  // Request a distance reading from the URM37
  switch(urm.requestMeasurementOrTimeout(DISTANCE, value)) // Find out the type of request
  {
  case DISTANCE: // Double check the reading we recieve is of DISTANCE type
    //    Serial.println(value); // Fetch the distance in centimeters from the URM37
    return value;
    break;
  case TEMPERATURE:
    return value;
    break;
  case ERROR:
    Serial.println("Error");
    break;
  case NOTREADY:
    Serial.println("Not Ready");
    break;
  case TIMEOUT:
    Serial.println("Timeout");
    break;
  } 

  return -1;
}

Help!!!

Is the code above a RS232 mode or TTL mode when I connect it on my Arduino Uno?
Referhttp://letsmakerobots.com/files/URM3.2_Mannual_Rev2.pdffor more details on RS232 and TTL mode on this sensor!!

Is the RX and TX (find for <<<<<<<<<<HERE<<<<<<<<<<<< up there) above is referring pin RX and TX respectively on the Arduino? Does the TX and RX pin of the URM 37 connected to the RX and TX pin on the Arduino respectively?

I do not want to spoil my sensor.
gf

#2

"The selection of RS232 or TTL output level is switched by changing three jumpers (J1, J2, J3). A diagram below illustrates the setting"

#3

Is the code above a RS232 mode or TTL mode when I connect it on my Arduino Uno?

The code doesn’t define the mode. The hardware does.

Jumper setting for RS232 and TTL output
The selection of RS232 or TTL output level is switched by changing three jumpers (J1, J2, J3). A
diagram below illustrates the setting:

Where did you put the jumper? You want TTL if you are connecting the sensor to the Arduino.

Is the RX and TX (find for <<<<<<<<<<HERE<<<<<<<<<<<< up there) above is referring pin RX and TX respectively on the Arduino? Does the TX and RX pin of the URM 37 connected to the RX and TX pin on the Arduino respectively?

No. You need to provide a link to the URMSerial library you are using, but it appears to use some form of software serial to talk to the sensor. In the code, it says that the sensor should be connected to pins 6 and 7.

I do not want to spoil my sensor.

Oh, come on. Buy it candy and flowers. Spoil it rotten.

#4