I have this piece of advise in my software engineer notes since 2015.
Just thought it would be nice to re-post / share it again.

The new MQTT architecture has been realized in an easy extensible, modular way. The different bundles are fully test covered to live up to the high coding standards of openHAB.

Sample apps are examples of working code that you can browse, run, and learn from to get started developing your own Google Cast app.

This reference provides the following API documentation for send and receiver applications.

LIRC is a package that allows you to decode and send infra-red signals of many (but not all) commonly used remote controls.

Recent linux kernels makes it possible to use some IR remote controls as regular input devices. Sometimes this makes LIRC redundant. However, LIRC offers more flexibility and functionality and is still the right tool in a lot of scenarios.

The most important part of LIRC is the lircd daemon which decodes IR signals received by the device drivers and provides the information on a socket. It also accepts commands for IR signals to be sent if the hardware supports this.

The user space applications allows you to control your computer with your remote control. You can send X11 events to applications, start programs and much more on just one button press. The possible applications are obvious: Infra-red mouse, remote control for your TV tuner card or CD-ROM, shutdown by remote, program your VCR and/or satellite tuner with your computer, etc. Using lirc on Raspberry Pie is quite popular these days.

Python 2.7 will not be maintained past 2020. Originally, there was no official date. Recently, that date has been updated to January 1, 2020.

We need to connect to the serial programming interface of the ESP8266 chip. This is done by connecting our serial-to-USB converter TX and RX pins to the ESP8266 RX and TX pins and powering the chip with the 3.3V and GND pins.