KNX smart building protocol now available for STM8 and STM32 MCUs

August 21, 2013

Toni_McConnel-August 21, 2013

STMicroelectronics and Tapko Technologies have released a KNX communication stack for all  STM8 and STM32 microcontrollers. This initiative will speed up development of smart-building systems for automatic lighting, heating, and other environmental controls that enhance energy efficiency and user comfort. The move addresses a market estimated at over €600 million in Europe alone, and allows engineers to leverage the advanced capabilities of ST’s STM8 and STM32 microcontroller families for innovative residential or commercial building-automation products.

KNX is currently used in over 70% of European smart-home devices. As an open standard, KNX promotes interoperability, saves costs, and enhances flexibility for product developers and equipment owners. Now managed by the KNX Association, it is ratified as CENELEC EN 50090 or CEN EN 13321-1 in Europe, GB/Z 20965 in China, ANSI/ASHRAE 135 in the USA, and globally as ISO/IEC 14543-3.


ST’s 8-bit STM8 microcontrollers and 32-bit STM32 ARM Cortex-M devices provide features such as an LCD controller, motor-control timers, Power-On Reset, real-time clock, memory-protection unit, dual watchdogs, anti-tamper protection, embedded EEPROM, fast and low power Analog to Digital Converter, flexible DMA matrix and optimized power consumption modes for battery-operated applications. The STM8L and STM32L feature ultra-low power via ST’s 130nm and 110nm low-leakage process, high performance from a voltage supply as low as 1.65V, and multiple power-management modes with fast wake-up.

In addition, the high-performance STM32F2 series, which features up to 1Mbyte Flash, Ethernet MAC, and hardware encryption, provides support for KNX tunneling over IP, allowing secure communication with smart-building systems via the Internet.

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