Hmmm, you can't use the sensor with this "set (D10,on)"?... You will need to remove that and just open the Ultrasonic distance control to test the sensor... the one that shows the value of the sensor... Assuming it is hooked up correctly if it shows a constant value like 255 it may be not working...

@danb, Try this;

In this example the Trigger is connected to Port D0 and the Ping is connected D1 If it detects something within 65mm servo D22 should move to Postion 13

$proxclose = 65 # Change for minimum distance


# sensor check
$proxsense = GetPing(D0,D1)

IF($proxsense < $proxclose)
#move servo
Servo(D22,13)

You might have switch the Trigger and Ping wires around.

To answer your question about confirming the wire colours Dan, the white wire is trigger and the green is echo so you will need to use two digital ports. Try connecting the sensor to the EZ-B as follows...

1. Ground = Black wire to D10 black pin (regulator)
2. Power = Red wire to D10 red pin (regulator)
3. Trigger = white wire to D10 White pin
4. Echo = green wire to D11 White pin

Click here and scroll down to the "Six-Distance sensor" project which is second from the bottom and download it. Adjust the digital ports in the ARC project to what you have your ping sensor connected to (in your case, D10 and D11 for echo).

I have the same problem. One of my sensors is stuck on 255 as well. I know that it must be the sensor as I have others that work fine. I hope I can return it,

These sensors are very sensitive to over-voltage. If you used it without a voltage regulator it is certainly ruined. Even if you used it correctly, they do sometimes burn out. They are also dirt cheap. I think you can get them on eBay (without the EZ-B voltage regulator or plastic case, which you can re use) or local electronic distributors for under $3. Search for HC-SR04.

I keep a couple of spares and would send you one but the postage from the US to Australia is far more than the part is worth.

Alan

Dear Alan

Thanks for the offer - in fact I think this just shows how remarkable the forum is for this kind of help to be given. In fact I bought 4 and 3 of them are working fine so I have more than enough. Happily they come with the voltage regulator already wired in so there should be no problem with the voltage.

This is not the problem with the faulty sensor but do they only work on certain connections to the EZ-B? I can't get any of my ultrasonic sensors to work on D23 and D22 but they spring into life on D7 and D8. I can't see that this is likely to be right but I think it is worth asking.

Also I notice that sometimes servos and motors on the roli don't work until you play with the controls and then all is good again. Is this normal?

I am having fun and certainly much more fun that work !

Cheers from sunny Sydney

Chris

I haven't heard about them not working on a specific port. I'll have free time Thursday and will try it out on those ports.

Very rarely I have the issue where Roli is unresponsive until restart him. Usually when the battery is starting to get low but before the low battery alert goes off.

Alan

Mind you I could not get the servo that works with the motion sensor working on these high port numbers either so perhaps there is a problem with my EZ-B ... I am sure that I will identify if the problems are real over the next few weeks. Happily I have two EZ-Bs so I am sure that I can narrow things down.