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.
Brick. A contractor-installed brick patio can cost $11.50 per square foot or more in February 2011, due to the labor involved. Kudzu estimates the most costly professionally-installed brick patios at between $2,500 and $5,000. However, brick patios are among the simplest patios to install yourself.ou just need to be willing to put in the time. According to Ask the Builder, a 15 x 20 foot brick or concrete paver patio can require between 100 and 150 man-hours to build. As of 2008, building a patio from 1 1/2 inch paving brick costs around $2.80 per square foot, or a little more than $300 for a 10 x 12 patio.