Louis Rubet

The Wattsense box is an electronic device that you connect to comfort equipment and sensors in your building, which sends its data via LTE and allows customers to interact remotely with the building via a simple REST API.

The box encodes and decodes the main smart buildings protocols, like BACnet, LonWorks, LoRaWAN, Modbus, and M-Bus, and acts like a message broker to redirect the building data to any external consumer in a generalized data model, including MQTT to the Wattsense cloud via LTE, local or remote MQTT agent to customer service, any other local or remote network protocol.

Software security and security updates have been a major concern from the design stage.

As a vice president of embedded systems in Wattsense, I designed the embedded software, developed the first version, hired a team to develop the main protocols, and fully managed the engineering. I also assumed the role of a CTO, helping the project and sales teams and leading the company's technical choices.

The SQV system is a fall detection system on metro tracks.

The technology of the SQV system is based on an infrared beam barrier replacing the platform doors on either side of the track and along the entire length of the platform. If the beams are cut, the system's intelligence detects the presence of a person or an object that has fallen on the tracks and triggers the emergency braking of the trains.

Responsibilities
• Designed the real-time software embedded in the infrared communication barrier redundant boards, in C without an operating system, at a software safety integrity level 2.
• Designed the Linux BSP of a board controlling commands and communications to the dock.
• Wrote the application software running on this board in C.
• Led the team of developers writing the barrier software and developing the unit, integration, and system tests.

This very demanding project was an opportunity for me to practice the highly standardized SSIL2 software environment.

One of the electronic boards of the Comet project is based on an FPGA integrating one softcore LEON-3, SPARC v8 architecture, a PCI controller, 3 Ethernet, 4 CAN, and several IO controllers. This daughterboard is plugged into an Intel Atom CPU-based motherboard running application software.

Responsibilities
• Designed a Linux BSP for the LEON-3 softcore integrated into the FPGA,
• Wrote the CAN and IO drivers of the FPGA to make them accessible to the Linux BSP.
• Porting on Linux, an application software exploiting the 3 CAN bus and the IOs of the board, taking commands from the motherboard through PCI.
• Configured the PCI IP of the FPGA to give access to the motherboard to the Ethernet IP of the FPGA through the PCI bus.
• Wrote the Ethernet driver for the Ethernet IPs, seen by the motherboard through the PCI bus, and integrated it into the motherboard BSP.

A functional math language using reverse polish notation inspired by HP RPL language. It manipulates reals, complexes, strings, and symbols on a stack with floating-point arbitrary precision, variables, and structure programming. Mostly used for scientific and engineering purposes.