PHPoC Expansion Board issue

[kdcarlso]

I tried running the sample code provided oin the PSP Library Reference under spc_request() and I get the error PHP error: undefined offset '1' in file relay.php on line 20. Can anyone provide any insight as to why I'm getting this error? I'm using a Blue P4S-342 with the PES-2401N relay board.

<?php
include_once "/lib/sd_spc.php";

spc_reset();
spc_sync_baud();

spc_scan();

$sid = 1;

function eio_in($sid, $pin)
{
$resp = spc_request($sid, 4, "get $pin input");

if($resp === false)
return "";

$resp = explode(",", $resp);

return $resp[1];
}

while(1)
{
echo eio_in($sid, 0);
echo eio_in($sid, 1);
echo eio_in($sid, 2);
echo eio_in($sid, 3);
echo "\r\n";

sleep(1);
}
?>

[support]

Hello,
Did you set the slave id on the relay board to the value on the code? or vice versa ?
For slave ID on the board, you can see here: https://www.phpoc.com/support/manual....php?id=layout