obniz
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obniz sdk for javascript
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# HC-SR505
It is used for detects humans/animals.
## wired(obniz, {signal [,vcc, gnd]})
It has three pins. Connect them to an obniz directly.
```Javascript
// Javascript Example
var sensor = obniz.wired("HC-SR505", {vcc:0, signal:1, gnd:2});
sensor.onchange = function(val){
console.log(val ? 'Moving Something!' : 'Nothing moving');
}
```
## onchange = function(value)
It called when something changed.
It humans is closing to a sensor, this function will called with value `true`.
If a humans leaves or if a human stops moving, this function will called with value `false`.
It's fileter works. So called with false after soon called with true.
```Javascript
// Javascript Example
var sensor = obniz.wired("HC-SR505", {vcc:0, signal:1, gnd:2});
sensor.onchange = function(val){
console.log(val ? 'Moving Something!' : 'Nothing moving');
}
```
## [await] getWait()
Get sensor value once.
```Javascript
// Javascript Example
var sensor = obniz.wired("HC-SR505", {vcc:0, signal:1, gnd:2});
var val = await sensor.getWait();
console.log(val ? 'Moving Something!' : 'Nothing moving');
```