Motion and Light Sensor

I developed an ultra low-power motion and light sensor as part of the MTronic building automation system.

This sensor initially had the same Bluetooth SoC as other MTronic devices, allowing us to collectively develop a centralized software stack and use that to accelerate our development time massively. However the high power consumption of the SoC would not allow for a battery life beyond 9 months despite heavy hardware, software and algorithmic optimizations.

I migrated the sensor to a much more power efficient, albeit more expensive nRF52 SoC. I independently implemented the necessary basic software components in just two months on Zephyr RTOS, something the team and I had no previous experience in. It took me another month to port the sensor algorithms and external libraries, and a few more days of debugging to get the sensor working perfectly. The sensor now boasts a battery life of 3+ years.