SRF02 ultra sonic, no feedback

Other Hardware Sensors
1

Hi there,

Can anyone help me? I have got an arduino uno and an srf02 ultra sonic range finder see link: Temperature Sensor, Steel Head 10K NTC - Micro Robotics

I have been following the instructions on the arduino wire library see link here: http://arduino.cc/en/Tutorial/SFRRangerReader

I have wired my sensor exactly how it says and when I connect my arduino to power the red light flashes on the sensor so I know it is getting power. But when I upload the code the sensor does not feed back numbers into my serial monitor. I can't seem to decipher the code, can anyone help, is there something which i have to add in in order to make it feed back?

I am sitting with everything in front of me so if anyone is to hand this evening I would be very grateful!

2

Have you got external pull ups on the I2C lines?
I can't see them on the tutorial diagram.
A couple of 4k7 should do the trick.

3

I'm sorry but an a bit of a novice so do not know what the i2c lines are! Or what an external pull up is or a 4k7!!

Do you think you might be able to fully explain?!

Sorry about this,

4

I2C is the two wire interface to the sonar sensor.
You need to a resistor between each signal line to +5v, and the resistor value should be between about 3900 and 4700 ohms.