Demand for smart building technology has ebbed and flowed for at least three decades and now several factors are conspiring to propel a new growth spurt. Notable triggers this time are the ongoing Covid-19 pandemic, the emergence of 5G, and maturing of more joined up IoT services. These are drawing in developments around the core components of building intelligence, namely HVAC (heating ventilation and air conditioning), energy management, lighting, advanced communications, air quality control, maintenance and general surveillance. These components are usually served by ICT infrastructure and knitted together increasingly by wireless communications rather than wired options. The wireless networks include WiFi, cellular and various lower power options, including established indoor protocols such as Zigbee, as well increasingly as longer…