Creating the server side

We now have the base ready and can continue with implementing the project-specific parts. The Raspberry Pi that is connected with the circuit and the lamp will act as a server. It will run a tiny web server that can be reached through a client of your choice using a web browser.

For the server side, we will adapt and evolve the server example used in Chapter 9, Making a Media Hub on the Raspberry Pi,  and combine it with an updated version of the gpio-packt recipe from Chapter 5, Creating, Developing, and Deploying on the Raspberry Pi, . To start with, we need to add the meta-packt_rpi layer used in earlier chapters of the book. We have already ensured that our newly created layer has a higher priority then meta-packt_rpi, but let's also add it in a dependency order in bblayers.conf. Here is the complete bblayers.conf file that will be used in this project:

# LAYER_CONF_VERSION is increased each time build/conf/bblayers.conf
# changes incompatibly
POKY_BBLAYERS_CONF_VERSION...