Sending “Hello” to RS485 via USB<>RS485 adapter

Receiving data using PuTTY Telnet connected to
IP:192.168.1.199
PORT:12345


PHP test file
<?php error_reporting(E_ALL); echo "<h2>TCP/IP Connection</h2>\n"; /* Get the port for the WWW service. */ $service_port = 12345; /* Get the IP address for the target host. */ $address = '192.168.1.199'; /* Create a TCP/IP socket. */ $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); if ($socket === false) { echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n"; } else { echo "OK.\n"; } echo "Attempting to connect to '$address' on port '$service_port'..."; $result = socket_connect($socket, $address, $service_port); if ($result === false) { echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n"; } else { echo "OK.\n"; } $in = "Hello from PHP"; $out = ''; echo "Sending HTTP HEAD request..."; socket_write($socket, $in, strlen($in)); echo "OK.\n"; //echo "Reading response:\n\n"; //while ($out = socket_read($socket, 2048)) { // echo $out; //} echo "Closing socket..."; socket_close($socket); echo "OK.\n\n"; ?>