SERIN Pin, Mode,{(Qual{,Qual}),} Item{,Item}

Receives one or more items on Pin in standard asynchronous format using 8 data bits, no parity and one stop bit. Mode is one of the following:

The list of data items to be received may be preceded by one or more qualifiers enclosed within parenthesizes. SERIN must receive these bytes in exact order before receiving the data items. If any byte received does not match the next byte in the qualifier sequence, the qualification process resets (i.e. the next received byte is compared to the first item in the qualifier list). A Qualifier can be a constant, variable or a string constant. Each character of a string is treated as an individual qualifier.

Once the qualifiers are satisfied, SERIN begins storing data in the variables associated with each Item. If the variable name is used alone, the value of the received ASCII character is stored in the variable. If variable is preceded by a pound sign ( # ), then SERIN converts a decimal value in ASCII and stores the result in that variable. All non-digits received prior to the first digit of the decimal value are ignored and discarded. The non-digit character which terminates the decimal value is also discarded.

SEROUT Pin, Mode, (Item{,Item})

Sends one or more items to Pin is standard asynchronous format using 8 data bits, no parity and one stop. Mode is one of the following:

SEROUT supports three different data types which may be mixed and matched freely within a single SEROUT statement.

2)  A numeric value (either a variable or a constant) will send the corresponding ASCII character. Most notably, 13 is carriage return and 10 is line feed.

While single-chip RS-232 level converters are common and inexpensive, thanks to current RS-232 implementation and the excellent I/O specifications of the PICmicro MCU, most applications don't require level converters. Rather, inverted TTL (N300..N9600) can be used. A current limiting resistor is suggested (RS-232 is suppose to be short-tolerant).