PHPUG CGN: Controlling Arduino With PHP

ARDUINO WITH PHP
CONNECTIONS TO THE PHYSICAL WORLD
Createdby /ThomasWeinert @ThomasWeinert

ARDUINO
Arduino is an open-source electronics
prototyping platformbased on flexible, easy-to-
use hardware and software. It's intended for
artists, designers, hobbyists and anyone
interested in creating interactive objects or
environments.

SHIELDS
HTTP://SHIELDLIST.ORG/

FRITZING
http://fritzing.org
11
55
1010
1515
2020
2525
3030
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
I
I
J
J

FIRMATA PROTOCOL
MidiBased
Pin Status
Pin Manipulation
Extended Commands

PHP - SERIAL PORTS
+ Just streams
- Consolecommands for configuration

WINDOWS
- fread() blocks until it gets data.

CARICA CHIP
$led=newCaricaChipLed($board->pins[13]);
$led->strobe()->on();

CARICA CHIP
$led->pulse()->on();

CARICA CHIP
$led->brightness(0.5)->pulse()->on();

CARICA FIRMATA
$board
->activate()
->done(
function()use($board){
$led->strobe()->on();
}
);
CaricaIoEventLoopFactory::run();

BASIC BLINK
$board->pinMode(13,0x01);
while(TRUE){
$board->digitalWrite(13,0xFF);
sleep(1);
$board->digitalWrite(13,0x00);
sleep(1);
}

BASIC BLINK OOP
$board->pins[13]->mode=CaricaFirmataPin::MODE_OUTPUT;
while(TRUE){
$board->pins[13]->digital=!$board->pins[13]->digital;
sleep(1);
}

BLINK NONBLOCKING
$loop=IoEventLoopFactory::get();
$board
->activate()
->done(
function()use($board,$loop){
$pin=$board->pins[13];
$pin->mode=FirmataPin::MODE_OUTPUT;
$loop->setInterval(
function()use($pin){
$pin->digital=!$pin->digital;
},
1000
);
}
);
$loop->run();

CARICA IO
EventLoop
EventEmitter
Promises

JAVASCRIPT EXAMPLE
vare=document.getElementById('output');
varcounter=0;
varinterval=window.setInterval(
function(){
e.textContent=e.textContent+counter.toString()+',';
counter++;
},
1000
);

PHP EXAMPLE
$loop=CaricaIoEventLoopFactory::get();
$loop->setInterval(
function(){
static$i=0;
echo$i++;
},
1000
);
$loop->run();

PROMISES
They describe an objectthatacts as aproxy for a
resultthatis initially unknown, usually because
the computation of its value is yetincomplete.

JAVASCRIPT EXAMPLE
jQuery
.get('hello-world.xml')
.done(
function(xml){
alert('loaded.');
}
)
);

PHP EXAMPLE
$mysqlOne=newCaricaIoDeferredMySQL(newmysqli('localhost'));
$mysqlTwo=newCaricaIoDeferredMySQL(newmysqli('localhost'));
$time=microtime(TRUE);
$debug=function($result)use($time){
var_dump(iterator_to_array($result));
var_dump(microtime(TRUE)-$time);
};
$queries=CaricaIoDeferred::When(
$mysqlOne("SELECT'Query1',SLEEP(5)")
->done($debug),
$mysqlTwo("SELECT'Query2',SLEEP(1)")
->done($debug)
);
CaricaIoEventLoopFactory::run($queries);

EVENT EMITTER
$stream=newStreamFile('c:/tmp/sample.txt');
$stream->events()->on(
'read-data',
function($data){
echo$data;
}
);
$stream->events()->on(
'error',
function($error)use($loop){
echo$error;
$loop->stop();
}
);

HTTPSERVER
useCaricaIoNetworkHttp;
$route=newHttpRoute();
$route->match(
'/hello/{name}',
function(HttpRequest$request,$parameters){
$response=$request->createResponse(
newHttpResponseContentString(
"Hello".$parameters['name']."!n"
)
);
return$response;
}
);

FILES
$route->match('/hello',newHttpRouteFile(__DIR__.'/files/hello.html'));
$route->startsWith('/files',newHttpRouteDirectory(__DIR__));
$server=newCaricaIoNetworkHttpServer($route);
$server->listen(8080);

HTML FILE
<!DOCTYPEhtml>
<html>
<head>
<title>LedSwitch</title>
</head>
<body>
<formaction="./switch/on"target="iframe">
<buttontype="submit">On</button>
</form>
<formaction="./switch/off"target="iframe">
<buttontype="submit">Off</button>
</form>
<iframestyle="width:200px;height:40px;border:none;"src="about:blank"name="ifram
</body>
</html>

PHP SERVER
useCaricaIoNetworkHttp;
$board
->activate()
->done(
$route=newHttpRoute();
$route->match(
'/switch/{state}',
function(HttpRequest$request,array$parameters)use($led){
if($parameters['state']=='on'){
$led->on();
$message='ON';
}else{
$led->off();
$message='OFF';
}
$response=$request->createResponse();
$response->content=newHttpResponseContentString(
$message,'text/plain;charset=utf-8'
);
return$response;
}
);
$route->match('/',newCaricaIoNetworkHttpRouteFile(__DIR__.'/index.html'));

SERVER
$led=newCaricaChipRgbLed(
$board->pins[3],$board->pins[5],$board->pins[6]
);
$route=newCaricaIoNetworkHttpRoute();
$route->match(
'/rgb',
function(HttpRequest$request)use($led){
$color=isset($request->query['color'])
?$request->query['color']:'#000';
$led->color($color)->on();
$response=$request->createResponse();
$response->content=newHttpResponseContentString(
'Color:'.$color
);
return$response;
}
);
$route->startsWith('/files',newHttpRouteDirectory(__DIR__));
$route->match('/',newHttpRouteFile(__DIR__.'/index.html'));
$server->listen(8080);
}

REACTPHP
{
"require":{
"react/react":"0.4.*"
}
}

RATCHET
{
"require":{
"cboden/ratchet":"0.3.*"
}
}

SHIFTOUT()
$loop->setInterval(
function()use($board,$latchPin,$clockPin,$dataPin){
static$number=0;
$latchPin->digital=FALSE;
$board->shiftOut($dataPin->pin,$clockPin->pin,$number);
$latchPin->digital=TRUE;
if(++$number>255){
$number=0;
}
},
1000
);

7 SEGMENT DISPLAYS
$loop->setInterval(
function()use(
$board,$latchPin,$clockPin,$dataPin,$numbers,$segments
){
static$number=0;
$digits=str_pad($number,$segments,0,STR_PAD_LEFT);
$bytes=[];
for($i=strlen($digits)-1;$i>=0;$i--){
$bytes[]=0xFF^(int)$numbers[$digits[$i]];
}
$latchPin->digital=FALSE;
$board->shiftOut(
$dataPin->pin,$clockPin->pin,$bytes
);
$latchPin->digital=TRUE;
if(++$number>(pow(10,$segments)-1)){
$number=0;
}
},
100
);

COMPOSER CREATE
composercreate-projectcarica/chip-skeletonled--stability=dev

CONFIGURE BOOTSTRAP
/**
*serial-serialconnection
*tcp-tcpconnection(networkshieldorserproxy)
*/
define('CARICA_FIRMATA_MODE','serial');
define('CARICA_FIRMATA_SERIAL_DEVICE','/dev/tty0');
define('CARICA_FIRMATA_SERIAL_BAUD',57600);
define('CARICA_FIRMATA_TCP_SERVER','127.0.0.1');
define('CARICA_FIRMATA_TCP_PORT',5339);

SKELETON
$board=include(__DIR__.'/bootstrap.php');
useCaricaChipasChip;
$board
->activate()
->done(
//Starthere!
}
);

LED OBJECT
$board=include(__DIR__.'/bootstrap.php');
useCaricaChipasChip;
$board
->activate()
->done(
$led=newChipLed($board->pins[13]);
$led->strobe(2000)->on();
}
);

PHPUG CGN: Controlling Arduino With PHP

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