Making the Ultrasonic Range Finder to work with Crumb;e

[James]

I have recently purchased an ultrasonic range finder to use with the Crumble controller. I am having an issue programming the the range finder to work with the Crumble. I am not sure whether it is something to do with how I have wired the crumble up or whether it is something to do with the program I have created.

Please see the attached images which show my wire set up and the program.

Many Thanks

James

[Mike]

Hi James,

I cant see the attached images for some reason.

If your sensor is the standard HC-SR04 then all you need to do is to connect GND to ground, VCC to +ve, and Trigger and Echo to two of the I/O pads A, B. C or D. You will need a battery to power the sensor as well.

Then use the Input/Output block to get a value from the sensor, setting T(rigger) and E(cho) to the correct I/O pads.

If you save the value into a variable then you should see it change as you wave things in front of the sensor. The number is approximately the distance in cm.

Good luck

Mike

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