pigpio library
pigpio pigpio C I/F pigpiod pigpiod C I/F Python pigs piscope Misc Examples Download FAQ Site Map

Pipe Interface

pigpio provides a pipe interface to many of its functions.

The pipe interface is available whenever pigpio is running, either because it has been started as a daemon, or it has been linked in to a running user program.  The pipe interface can be disabled by the program which initialises the library.  pigpiod offers the -f option to disable the pipe interface.  User programs should call gpioCfgInterfaces if they wish to disable the pipe interface.

pigpio listens for commands on pipe /dev/pigpio.  The commands consist of a command identifier with, depending on the command, zero, one, or two parameters.  The result, if any, may be read from pipe /dev/pigout.  If any errors are detected a message will be written to pipe /dev/pigerr.

The format of the commands is identical to those used by pigs.
[pigpio] [pigpio C I/F] [pigpiod] [pigpiod C I/F] [Python] [pigs] [piscope] [Misc] [Examples] [Download] [FAQ] [Site Map]
© 2012-2020
e-mail: pigpio @ abyz.me.uk
Updated: 26/05/2020