So, just make sure you have node and node-gyp as well as the Broadcom library to build the project. 1  Download BCM2835 library and follow installation instructions. 2  In case, you don't have node-gyp, install it first: $ sudo npm install node-gyp -g. 3  Generate the configuration files. $ node-gyp configure.  Build the component. $ node-gyp build.
Cost to Install Cement Patio. While the cost of installing a cement patio can range from $5 to $11 per square foot, the average cost for the typical cement patio installation is generally closer to $8 per square foot.
Patio pavers are usually more expensive than concrete patios. They cost anywhere from about $12 to $22 per square foot, including the cost of installation, which is very labor intensive. For a patio that is 16x20 feet, that works out to a total of $3,840 to $7,040, based on the price range above.oncrete Patio Cost. A plain concrete slab usually costs $2 to $5 per square foot installed, depending on your region of the country. Decorative concrete patios start at about $6 to $10 per square foot for a simple design.