Internet Switch using PHPoC Board and 4-Port Di/Do Board

[roy]

[Subject]

This project is an implementation of the Internet switch by connecting a 4-port relay output board (PES-2401) and a 4-port digital input board (PES-2402) to the PHPoC board type product.


[Video - PHPoC Blue]

[Video - PHPoC Black]

[Description - Input Part]

The PHPoC board monitors the swtich input through the 4 port digital input port (PES-2402), and when the switch input state is changed, it passes the state to the opposite PHPoC board via TCP/IP.


[Description - Output Part]

The PHPoC board which receives the status turns on / off the lamp using the connected 4 port relay output board (PES-2401).
At this time, on / off of the lamp is synchronized with the input ports of the opposite PHPoC board.


[Components - Input Part]

1. PHPoC Blue(P4S-342) or PHPoC Black(P4S-341) x 1
or

2. 4 Port Digital Input Board (PES-2402) x 1


3. PHPoC Bread Board (PES-020-002) 1


4. Push Buttons x 2 and Jumper Wires


[Components - Output Part]

1. PHPoC Blue(P4S-342) or PHPoC Black(P4S-341) x 1

2. 4 Port Relay Output Board (PES-2401) x 1


3. A House Model x 2

[Connection - Input Part]


[Connection - Output Part]


[Souce Code - Input Part]

<?php

include_once "/lib/sd_spc.php";
include_once "/lib/sn_tcp_ac.php";

spc_reset();
spc_sync_baud(115200);

$sid = 1;
$pin_id = 0;
$last_in = array(0, 0, 0, 0);
$in = array(0, 0, 0, 0);
$server_addr = "10.6.0.241";
$server_port = 5020;

function read_in($sid, $pin)
{

    $response = spc_request($sid, 4, "get $pin input");

    $response_code = substr($response, 0, 3);
    if($response_code != "200")
        return -1;

    $response_data = substr($response, 4, 1);
    if($response_data == "1")
        return 1;
    elseif($response_data == "0")
        return 0;
    else
        return -1;
}

spc_request($sid, 4, "set 0 delay 100");

echo "connecting...";

tcp_client(0, $server_addr, $server_port);
while(tcp_state(0) != TCP_CONNECTED)
    ;

echo "connected!\r\n";

while(1)
{
    $state_in = "";
    $event = false;

    for($pin_id = 0; $pin_id < 4; $pin_id++)
    {
        if(($in[$pin_id] = read_in($sid, $pin_id)) != $last_in[$pin_id])
        {
            $last_in[$pin_id] = $in[$pin_id];
            $event = true;
        }
        usleep(5000);
    }

    if($event)
    {
        for($pin_id = 0; $pin_id < 4; $pin_id++)
        {
            $state_in .= (string)$last_in[$pin_id];
        }
        echo $state_in, "\r\n";
        tcp_write(0, $state_in);
    }
}

?>

[Souce Code - Output Part]

<?php

include_once "/lib/sd_spc.php";
include_once "/lib/sn_tcp_ac.php";

spc_reset();
spc_sync_baud(115200);

$sid = 1;
$pin_id = 0;
$new_out = array(0, 0, 0, 0);
$local_port = 5020;

function get_out($sid, $pin)
{
    $response = spc_request($sid, 4, "get $pin output");

    $response_code = substr($response, 0, 3);
    if($response_code != "200")
        return -1;

    $response_data = substr($response, 4, 1);
    if($response_data == "1")
        return 1;
    elseif($response_data == "0")
        return 0;
    else
        return -1;
}

function set_out($sid, $pin, $sig)
{
    if($sig == 1)
        $level = "high";
    elseif($sig == 0)
        $level = "low";
    else
        exit("undefined state \r\n");
    spc_request($sid, 4, "set $pin output $level");
}

echo "listen...";

tcp_server(0, $local_port);
while(tcp_state(0) != TCP_CONNECTED)
    ;

echo "connected!\r\n";

while(1)
{
    $state_in = "";
    if(tcp_read(0, $state_in) == 4)
    {
        for($pin_id = 0; $pin_id < 4; $pin_id++)
        {
            $new_out[$pin_id] = (int)substr($state_in, $pin_id, 1);
            set_out($sid, $pin_id, $new_out[$pin_id]);
            usleep(5000);
        }
        echo $state_in, "\r\n";
    }
    usleep(200000);
}

?>