======f485open====== WMPRO, WMMINI FW >= 1.922 WMMEGA FW >= 2.0 Open the RS-485 port at the specified baud rate and parity ====Description==== int f485open ( int $baud, int $parity ) Attempt to open the RS-485 port as a stream, and return the file handle for future operations In order to use the RS-485 port, you need to disable modbus polling (see [[how_tos:Serial Port Programming#Using the RS-485 Serial Port]]). ====Parameters==== $baud: Rate in bits per second $parity: 0 (even parity) or 1 (odd parity) ====Return Values==== Integer: File handle, or 0 if the attempt to open the RS-485 port fails The file handle may be used together with the other file functions that require a handle such as [[fgets()]], [[fwrite()]], [[fclose()]] and [[feof()]] ====Example==== ===Open the 485 port at 115200 baud with even parity===

====See Also==== [[how_tos:Serial Port Programming]] - Some information on connecting and using the serial ports [[fopen()]] - Open a file for reading or writing [[fseropen()]] - Open the serial port at the specified baud rate with optional parameters [[fsockopen()]] - Open an internet socket connection with optional timeout [[fread()]] - Read bytes from a file, stream or socket [[fgets()]] - Return a single line from a file, stream or socket, with optional size limit [[fwrite()]] - Write data to a file, stream or socket [[feof()]] - Test if no more data is available in a file, stream or socket [[filesize()]] - Return the size of a file, or the number of unread bytes in a stream or socket [[fseek()]] - Position the file pointer in an open file [[ftell()]] - Return the current position of a file read/write pointer [[fclose()]] - Close a file, stream or socket