Sum Labs Wearable

Sum Labs (formerly Project Florida) was a startup focused on wellness. Their first offering was slated to be a wristworn health monitor that assisted users in tracking their hollistic well-being. The wearable analyzed the user’s pulse and used a novel algorithm to give the user insight into their mental state, including the amount of time spent in areas of focus and calm.

The wearable was built around an STM32 MCU and a CSR Hybrid Bluetooth chipset. The device stored a mixture of raw and computed data to it’s onboard QSPI NOR Flash Memory. A custom Analog Front-End was created for the Pulse Plesmography (PPG) sensor.

I worked on this project at the R&D phase, primarily quantifying sensor performance and working with the external hardware and firmware partners to validate the product. We whittled down the list of relevant sensor streams and put an enormus amount of effort into our own PPG front-end and signal-processing algorithms for retrieving pulse and blood-oxygen level values. I also created tooling for a clinical trial of the device, and assisted the trial in-person.