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.
Those opting for hand coloring, unique angles or a special design will see the price rise to more than $15 per square foot. The average price that homeowners pay for a concrete patio is around $2,800 to just over $4,000, but some homeowners report spending as little as $1,000 or as much as $6,500.A custom design typically costs more because those projects involve more work.hose opting for hand coloring, unique angles or a special design will see the price rise to more than $15 per square foot. The average price that homeowners pay for a concrete patio is around $2,800 to just over $4,000, but some homeowners report spending as little as $1,000 or as much as $6,500.