Playground.arduino.cc will be read-only starting December 31st, 2018. For more info pleae look at this Forum Post

This is the base for all pages related to code.

See InterfacingWithHardware? or GeneralCodeLibrary for actual code.

Then this is where a logical person would look for a list of allthe code available however you wish to link it . It should be here in a directory type format

Code Snippets Available

ie http://playground.arduino.cc/Code/DateTime

ZsuTT 2.5 - Timer Switch (Zeitschaltuhr) with MQTT feedback, version 2.5

I have not found any others yet please edit and add