The most significant risk is the full integration of the FSR with the housing tip, and tuning the CPI in software, but these are being addressed with consistent testing and iteration. There were no significant changes made to the design, and our schedule is unchanged.
With our timing module tests, we found that our overall optical sensor to drawing latency is ~46ms, well within our 80ms requirement. Our CPI accuracy test yielded that a 45 degree tilt in sensor orientation from a horizontal orientation is within a 1% margin of error of the CPI with horizontal orientation. Our total weight, while not final yet, is ~40g, which is higher than our projected maximum of 30g, but this was a tradeoff for usability with more complex components. Measuring the current draw of our sensor combined with the MCU and battery resulted in an average active current draw of 23mA and an estimated battery life of 4.35hrs, well above our requirement of 2hrs.
