Description

The heart of the system is an STM32L4-based microcontroller, connected to a WI-FI + Bluetooth module. Also on the board will be a combined temperature, pressure, and humidity sensor. The controller will connect via the local network, or bluetooth, to the various devices controlled by the smart home, such as a coffee maker, the air conditioning and heating system, the blinds, and the lights. The controller will also connect to various edge sensors, such as motion detectors and water leak sensors, which will be on their own PCBs, controlled by extremely low-cost, low-power STM32U0’s powered by batteries.

The configuration and status of the smart home network will be synchronized with the cloud, using a small database. This database can also be accessed by the end user with a mobile phone application, which will allow the user to control the system while away from home. While at home, the user will be able to connect to the controller directly, in order to bypass the latency associated with updating and polling the database.