Riccardo Maestri

EOS is a thermostat with a core function as a configurable I/Os that can match most customer scenarios. Collection of requirements and design of proper electronics architecture was fundamental to achieving this.

The UI had to be simple, flexible, and give great UX. To achieve this, I chose a graphic OLED coupled with a capacitive touch interface smartphone, simplified to match the product use case.

A safe FOTA process was implemented, including an automatic rollback function as a safe recovery mechanism. The MCU could buffer FOTA operations for its radio or actuator submodules, safely storing the firmware image and performing the upgrade offline once the whole firmware was completely stored in the buffer, ensuring a safe process.

The project also included environmental sensors such as barometric pressure, humidity, temperature, and presence detection through PIR motion and proximity sensors. For all these sensors, among their drivers, I implemented a specific signal processing to generate an event only when required, filtering out all possible noises and false triggering.

N-Touch is a set of electronic water taps for residential and hospitality use. It consists of a waterproof touch panel, where the UI permits to choose temperature and water flow, while a remote mixing valve outputs the requested water temperature and flowrate.

A critical mission was finding a solution for a waterproof touch panel and a mechanical design for the mixing valve showing sufficient endurance. It was achieved through mechanical design iterations and collaboration with manufacturers.

From a software perspective, the touch panel had to be able to work in stressful conditions such as steam, water drops, or completely underwater, which was achieved through signal filtering and processing.

The mixing valve had to work for years, even resume working if not used for a long time. It was achieved using a self-cleaning solution implemented by software, supported by a specific mechanical design allowing for cleaning of the mixing actuator.

An advanced feature of the electronic tap, especially for the shower, was keeping the temperature stable, matching the user's request. It was achieved using a PID coupled with some solutions covered by a patent.