Using GH-311 Ultrasound motion sensor

[espruino-discuss3]

Posted at 2015-03-30 by jacklee

Hi, all
I have a GH-311 ultrasound sensor and how can I use it? Because I only can find the HC-SR04 module in the website.
And when I using the HC-SR04 will get a error say Warning: Unable to set watch on pin.
Thanks

[gfwilliams]

Posted at 2015-03-30 by @gfwilliams

Hi - I'm afraid the GH-311 isn't really very useful at all. I've just googled it and it gives a single output: High when you're near to it, and Low when you're far away - there is no distance measurement.

So you can't use it with the HC-SR04 driver... The best you could do is:

setWatch(function(e) {
  if (e.state) console.log("In Range");
  else  console.log("Out of Range");
}, SENSOR_PIN, { repeat: true });