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.
Average cost per square foot: $11 to $19; Material type, square footage and equipment used may result in higher costs for a total patio installation. Types of Stone Pavers. Stone pavers offer a natural look for patios and come in several varieties, including: Cobblestone - to create an old-fashioned look; Flagstone - a common choice for patios and walkways