# obniz.js: sdk for javascript
[](https://badge.fury.io/js/obniz)
 [](http://travis-ci.org/obniz/obniz)
sdk for controlling [obniz](https://obniz.io/) using [obniz api](https://obniz.io/doc/about_obniz_api) from javascript.
It works on both browser and nodejs.
## Usage
```html
```
## Installation
### Browser
Add the following script tag to your html
```html
```
### Nodejs
Install obniz via npm
```shell
npm install obniz
```
and import it to js file.
```javascript
const Obniz = require('obniz');
```
## Connect
The details are on [doc/connection](./doc/connection.md) ([ja](./doc/connection-ja.md))
To use obniz, instantiate obniz with obniz id, and set onconnect callback function. It will be called when connected to obniz successfully.
```javascript
var obniz = new Obniz("0000-0000");
obniz.onconnect = async function () {
}
```
You can use everything on obniz once connection succeeds.
```javascript
var obniz = new Obniz("0000-0000");
obniz.onconnect = async function () {
obniz.display.print("hello!");
obniz.switch.onchange = function(state) {
if (state === "push") {
obniz.display.print("Button Pressed");
}
}
}
```
and its io peripherals too can be used
```javascript
var obniz = new Obniz("0000-0000");
obniz.onconnect = async function () {
obniz.io0.drive("5v");
obniz.io0.output(true)
obniz.io1.pull("3v");
obniz.io1.drive("open-drain");
obniz.io1.output(false);
obniz.io2.drive("3v");
obniz.io2.output(true);
obniz.ad3.start(function(voltage){
console.log("changed to "+voltage+" v")
});
var pwm = obniz.getFreePwm();
pwm.start({io: 4});
pwm.freq(1000);
pwm.duty(50);
var uart = obniz.getFreeUart();
uart.start({tx: 5, rx: 6, baud:9600});
uart.onreceive = function(data, text) {
console.log(data);
}
uart.send("Hello");
}
```
## Parts library
The parts library is embedded in obniz.js.
All parts and their details can be found there.
[obniz Parts Library](https://obniz.io/sdk/parts/)
To use the connected parts, instantiate the parts in onconnect callback function and use it. The function list can be found on [obniz Parts Library](https://obniz.io/sdk/parts/).
For example, LED is found here [https://obniz.io/sdk/parts/LED](https://obniz.io/sdk/parts/LED)
```javascript
var obniz = new Obniz("0000-0000");
obniz.onconnect = async function () {
var led = obniz.wired("LED", {anode:0, cathode:1});
led.blink();
}
```
HC-SR40(distance measure) [https://obniz.io/sdk/parts/HC-SR04](https://obniz.io/sdk/parts/HC-SR04)
```javascript
var obniz = new Obniz("0000-0000");
obniz.onconnect = async function () {
var hcsr04 = obniz.wired("HC-SR04", {gnd:0, echo:1, trigger:2, vcc:3});
hcsr04.unit("inch");
hcsr04.measure(function( distance ){
console.log("distance " + distance + " inch")
})
}
```
## Example: browser integrates hardware
It is easy to integrate UI and hardware on html
```html
```
## Example: integrate web services
It is also easy to integrate web services like Dropbox and Twitter and hardware.
```javascript
// save data from obniz to dropbox
var obniz = new Obniz("0000-0000");
obniz.onconnect = async function () {
var dbx = new Dropbox({ accessToken: '' });
var button = obniz.wired("Button", {signal:0, gnd:1});
button.onchange = function(pressed){
if (pressed) {
dbx.filesUpload({path: '/obniz.txt', contents: "[Button Pressed]\n" + new Date(), mode: 'overwrite' });
}
};
}
```
## Example: integrate two or more obniz
Not only is web-obniz coordination easy, but obniz-obniz coordination is also easy.
```javascript
// control servomotor from potention meter which connected to another obniz.
var obnizA = new Obniz("0000-0000");
obnizA.onconnect = async function () {
var obnizB = new Obniz("0000-0001");
obnizB.onconnect = async function(){
var meter = obnizA.wired("Potentiometer", 0, 1, 2);
var servo = obnizB.wired("ServoMotor", 0, 1, 2);
meter.onchange = function(position) {
servo.angle(position * 180);
};
}
}
```
## Documentation
You can find the documentation on [the website](https://obniz.io/doc/).
## Lisence
See [LICENSE.txt](./LICENSE.txt)