pigpio (i.e., "Pi GPIO", not "Pig Pio") is a softare library for the Raspberry Pi which allows control of the General Purpose Input Outputs (GPIO). pigpio works on all versions of the Pi.
If trying to execute some Python code you get a message something like:
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Can't connect to pigpio at localhost(8888) Did you start the pigpio daemon? E.g. sudo pigpiod(etc.) you probably need to download and install pigpio.
From the Download & Install page of pigpio library:
If you don't already have a ~/pigpio directory:
cd ~ mkdir pigpiothen download, compile and install it:
cd ~/pigpio rm pigpio.zip sudo rm -rf PIGPIO wget abyz.me.uk/rpi/pigpio/pigpio.zip unzip pigpio.zip cd PIGPIO make sudo make install