Ibrahim alnasser
Published

PHPoc Blue to Control Door Knob by MQTT Protocol and Cortana

Programming a PHPoc Blue board to control a servo motor to rotate the knob of a door using MQTT Protocol through voice command.

IntermediateShowcase (no instructions)10 hours785
PHPoc Blue to Control Door Knob by MQTT Protocol and Cortana

Things used in this project

Hardware components

Servos (Tower Pro MG996R)
Servo motor has to be with more 250 torque
×1
PHPoC Blue
PHPoC Blue
×1

Software apps and online services

Visual Studio 2015
Microsoft Visual Studio 2015
PHPoC Debugger
PHPoC Debugger

Story

Read more

Schematics

Connect the Servo motor with Board

simple diagram to connect the servo motor with board
Servo jenxb5twau

the motor Connected

a photo after we connect the servo motor with PHPoc Blue Board
Servo example pic uwft3lqqpi

Code

task0 file the main file

PHP
it used to program the board
<?php
//edited By ibrahim al nasser 2017
// this code originally from Phpoc website i edit this 
// to fit the requirements an also correct some errors
// from practical point of view
if(_SERVER("REQUEST_METHOD"))
exit; // avoid php execution via http request

include_once "/lib/sn_dns.php";
include_once "/lib/vn_mqtt.php";
include_once "/lib/sd_340.php";

define("PWM_PERIOD", 20000); // 20000us (20ms)
define("WIDTH_MIN", 600);
define("WIDTH_MAX", 2450);
	uio_setup(0, 30, "out high");
uio_setup(0, 31, "out high");
	

	$flags = 0;
$angle = 0;

um_read(0, 0, $flags, 4); // read flags (offset 0, 32bit integer)
um_read(0, 4, $angle, 4); // read angle (offset 4, 32bit integer)
			
if(!$flags)
{
	ht_pwm_setup(0, (WIDTH_MIN + WIDTH_MAX) / 2, PWM_PERIOD, "us");

	$flags |= 0x00000001; // set init flag
	um_write(0, 0, int2bin($flags, 4)); // write flags (offset 0, 32bit integer)

	$angle = 90;
	um_write(0, 4, int2bin($angle, 4)); // write angle (offset 4, 32bit integer)
}



//$host_name = "test.mosquitto.org";
//$host_name = "iot.eclipse.org";
$host_name = "broker.hivemq.com";
//$host_name = "broker.mqttdashboard.com";
//$host_name = "[192.168.0.3]";
$port = 1883;

mqtt_setup(0, "PHPoC-MQTT Sub Example",  $host_name, $port); 

/*
$will_qos = 2;
$will_retain = true;
$will_topic = "disaster/tsunami";
$will_message = "Goodbye forever");
$will = array($will_qos, $will_retain, $will_topic, $will_message);
*/
$will = "";
$username = "";
$password = "";

mqtt_connect(true, $will, $username, $password);

$out_topics = array(array("room/open", 1), array("room/close", 2));


$in_topic = "";
$in_content = "";
$is_retain = 0;

while(1)
{	
	while(mqtt_state() == MQTT_CONNECTED)
{
	if(mqtt_subscribe($out_topics))
		break;
}
if(mqtt_state() == MQTT_DISCONNECTED)
		while(mqtt_reconnect() == false);
	uio_out(0, 31, LOW);
	if(mqtt_loop($in_topic, $in_content, $is_retain))
	{
		//TODO , procees the received publish packet here
		if($is_retain == 1)
		//	echo "<<a stale message\r\n";
	uio_out(0, 30, LOW);
	//	echo "<<topic:$in_topic\r\n";
		echo "<<content: $in_content\r\n";
		if($in_content=="openning"){
		uio_out(0, 30, HIGH);

	$delta = -180; // clock wise

	
if($delta)
{
	um_read(0, 4, $angle, 4); // read angle (offset 4, 32bit integer)

	$angle += $delta;

	if($angle > 180)
		$angle = 180;

	if($angle < 0)
		$angle = 0;

	um_write(0, 4, int2bin($angle, 4)); // write angle (offset 4, 32bit integer)

	$width = WIDTH_MIN + (int)round($angle / 180.0 * (WIDTH_MAX - WIDTH_MIN));

	ht_pwm_width(0, $width, PWM_PERIOD);
	
}
			}
		else{
			if($in_content=="closing"){

	$delta = 180; // clock wise
if($delta)
{
	um_read(0, 4, $angle, 4); // read angle (offset 4, 32bit integer)

	$angle += $delta;

	if($angle > 180)
		$angle = 180;

	if($angle < 0)
		$angle = 0;

	um_write(0, 4, int2bin($angle, 4)); // write angle (offset 4, 32bit integer)

	$width = WIDTH_MIN + (int)round($angle / 180.0 * (WIDTH_MAX - WIDTH_MIN));

	ht_pwm_width(0, $width, PWM_PERIOD);
}
				
				}}
	
	}
}
//mqtt_unsubscribe("sensors/temperature");
	
mqtt_disconnect();

?>

phpoc.ini

PHP
to extend the cach memory in the board
tcp0_txbuf_size = 4096 ; SSL/TCP send buffer
tcp0_rxbuf_size = 4096 ; SSL/TCP send buffer
ssl0_rxbuf_size = 4096

init.php file

PHP
the initial file for the Phpoc Blue board
<?php
system("php task0.php")
?>

Costum Cortana Commands Project

it used to program a specific commands through cortana

Credits

Ibrahim alnasser

Ibrahim alnasser

0 projects • 0 followers
a Master Student in Embedded Systems Program , in TU Chemnitz

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