I have the following sketch (see below) on my PC which compiles perfectly. When I upload it to the board however I keep on receiving the "out of sync" error when the wires are hooked. If I upload it and then make the wire config I do not get an error, but also no readings.
Can it be my URM is fried?
/* Ultrasound Sensor
*------------------
* URM V3.2 ultrasonic sensor TTL connection with Arduino
* Reads values (0-300) from an ultrasound sensor (3m sensor)
* and writes the values to the serialport.
* Pin12 (Arduino)-> Pin 1 VCC (URM V3.2)
* GND (Arduino) -> Pin 2 GND (URM V3.2)
* Pin11 (Arduino) -> Pin 7 (URM V3.2)
* Pin 0 (Arduino) -> Pin 9 (URM V3.2)
* Pin 1 (Arduino) -> Pin 8 (URM V3.2)
* www.yerobot.com
* Last modified 20/04/2009
*/
int UREnable = 11; // Ultrasound enable pin
int URPower = 12; // Ultrasound power pin
int val = 0;
int USValue = 0;
int timecount = 0; // Echo counter
int ledPin = 13; // LED connected to digital pin 13
boolean flag=true;
uint8_t DMcmd[4] = { 0x22, 0x00, 0x00, 0x22}; //distance measure command
void setup() {
Serial.begin(9600); // Sets the baud rate to 9600
pinMode(ledPin, OUTPUT); // Sets the digital pin as output
pinMode(UREnable, OUTPUT);
digitalWrite(UREnable, HIGH); // Set to High
pinMode(URPower, OUTPUT);
digitalWrite(URPower, HIGH); // Set to High
delay(200); //Give sensor some time to start up --Added By crystal from Singapo, Thanks Crystal.
}
void loop()
{
flag=true;
//Sending distance measure command : 0x22, 0x00, 0x00, 0x22 ;
for(int i=0;i<4;i++)
{
Serial.print(DMcmd[i]);
}
delay(75); //delay for 75 ms
while(flag)
{
if(Serial.available()>0)
{
int header=Serial.read(); //0x22
int highbyte=Serial.read();
int lowbyte=Serial.read();
int sum=Serial.read();//sum
if(highbyte==255)
{
USValue=65525; //if highbyte =255 , the reading is invalid.
}
else
{
USValue = highbyte*255+lowbyte;
}
Serial.print("Distance=");
Serial.print(USValue);
flag=false;
}
}
delay(50);
}
