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.
How much does it cost to lay paving slabs labour only per meter square. Prices vary according to information supplied by different sources, but you'll be looking at an average labour cost of Â£25 per square metre (slabs not included). Patios provide an excellent outdoor space in which to perform various functions.