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MAKING ROBOTS

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GONNA TALK ABOUT ▸ hardware ▸ software ▸ creativity

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HARDWARE ▸ Arduino ▸ Tessel

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THEY UNDERSTAND ▸ Javascript ▸ C/C++

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INPUT, OUTPUTS, SERIAL... (OH MY!)

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MANY WAYS TO PROGRAM ▸ Compiled ▸ Firmata

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TIME TO MAKE IT WORK!

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SIMPLE AND EFFECTIVE!

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SOMETIMES CIRCUITS GET COMPLEX

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LIMITS (LIKE CURRENT)

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LET'S MAKE A NEW CIRCUIT, AND LEARN SOME NEW COMPONENTS...

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RESISTOR

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DIODE

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TRANSISTOR

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http://bit.ly/arduino-motors

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WHAT CAN WE DO WITH THIS?

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USEFUL WITH AERYS

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WHAT ELSE?

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interface Service { public function name(); public function colors(); public function query(); public function dismiss(); }

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namespace Notifier\Service; use Notifier\Service; use Endroid\Twitter\Twitter as Client; class Twitter implements Service { private $client; private $new = false; private $since = null; public function __construct($consumerKey, $consumerSecret, $accessToken, $accessTokenSecret) { $this->client = new Client( $consumerKey, $consumerSecret, $accessToken, $accessTokenSecret ); } }

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public function query() { if ($this->new) return true; $parameters = ["count" => 1]; if ($this->since) { $parameters["since_id"] = $this->since; } $response = $this->client->query( "statuses/mentions_timeline", "GET", "json", $parameters ); $tweets = json_decode($response->getContent()); if (count($tweets) > 0) { $this->new = true; $this->since = (int) $tweets[0]->id; } return $this->new; }

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public function dismiss() { $this->new = false; } public function name() { return "twitter"; } public function colors() { return [1 - 0.11, 1 - 0.62, 1 - 0.94]; }

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namespace Notifier\Service; use Notifier\Service; class Gmail implements Service { private $new = false; private $emails = []; private $username; private $password; public function __construct($username, $password) { $this->username = $username; $this->password = $password; } }

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public function query() { if ($this->new) return true; $inbox = imap_open( "{imap.gmail.com:993/imap/ssl}INBOX", $this->username, $this->password ); if (!inbox) { return false; } // ...

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$emails = imap_search($inbox, "ALL", SE_UID); if ($emails) { foreach ($emails as $email) { if (!in_array($email, $this->emails)) { $this->new = true; break; } } $this->emails = array_values($emails); } return $this->new; }

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public function dismiss() { $this->new = false; } public function name() { return "gmail"; } public function colors() { return [1 - 0.89, 1 - 0.15, 1 - 0.15]; }

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use Carica\Io; use Carica\Firmata; $loop = Io\Event\Loop\Factory::get(); $board = new Firmata\Board( Io\Stream\Serial\Factory::create( "/dev/cu.usbmodem14111", 57600 ) ); $board ->activate() ->done(function () use ($loop, $board) { // ...connect to services }); $loop->run();

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// diode pins $board->pins[10]->mode = Firmata\Pin::MODE_PWM; $board->pins[10]->analog = 1; $board->pins[11]->mode = Firmata\Pin::MODE_PWM; $board->pins[11]->analog = 1; $board->pins[9]->mode = Firmata\Pin::MODE_PWM; $board->pins[9]->analog = 1; // sensor pins $board->pins[12]->mode = Firmata\Pin::MODE_OUTPUT; $board->pins[12]->digital = 1; $board->pins[14]->mode = Firmata\Pin::MODE_ANALOG;

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$services = new SplQueue(); $services->enqueue([ new Notifier\Service\Twitter( getenv("SERVICE_TWITTER_CONSUMER_KEY"), getenv("SERVICE_TWITTER_CONSUMER_SECRET"), getenv("SERVICE_TWITTER_ACCESS_TOKEN"), getenv("SERVICE_TWITTER_ACCESS_TOKEN_SECRET") ), false ]); $services->enqueue([ new Notifier\Service\Gmail( getenv("SERVICE_GMAIL_USERNAME"), getenv("SERVICE_GMAIL_PASSWORD") ), false ]);

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$loop->setInterval(function () use (&$services) { $remaining = count($services); while ($remaining--) { $next = $services->dequeue(); $next[1] = $next[0]->query(); $services->enqueue($next); } }, 1000 * 5);

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$service = null; $next = function () use ($loop, $board, &$next, &$services, &$service) { $remaining = count($services); while ($remaining--) { $next = $services->dequeue(); $services->enqueue($next); if ($next[1]) { $service = $next; break; } } // ...no notifications if (!$service) return; // ...

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$colors = $service[0]->colors(); $board->pins[10]->analog = $colors[0]; $board->pins[11]->analog = $colors[1]; $board->pins[9]->analog = $colors[2]; $loop->setTimeout(function () use ($board, &$service) { $board->pins[10]->analog = 1; $board->pins[11]->analog = 1; $board->pins[9]->analog = 1; $service = null; }, 1000 * 1.5); }; $loop->setInterval($next, 1000 * 4);

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$loop->setInterval(function() use ($board, &$services, &$service) { if ($service !== null && $board->pins[14]->analog < 0.1) { $remaining = count($services); while ($remaining--) { $next = $services->dequeue(); // dismissing notification... if ($next[0]->name() === $service[0]->name()) { $service = null; $next[0]->dismiss(); $next[1] = false; } $services->enqueue($next); } } }, 50);

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bit.ly/sitepoint-arduino-notifications

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QUESTIONS? twitter.com/assertchris