This week I wanted to work on the calibration (such that it doesn’t have to be recalibrated after disconnecting), investigating the velocity, and figure out how to plot the serial data. Jason offered to manage the plotting, so I focused on the first two tasks. I was able to generate velocity in all 3 directions, but due to the difficulty of plotting data, I have not yet verified their accuracy (but they seem close to reasonable). Figuring out how to save the calibration status has taken longer than I was hoping and I think I need to do some more reading on how calibration gets stored before success. But so far, I (at least suspect) can calibrate the sensor and load the new values into a register on the sensor, however, I haven’t been able to check that the values stay the same upon rebooting yet. So I think I’m halfway there. This shouldn’t be an issue for our upcoming demo since we can just keep the sensor connected and calibrating is a quick process. Next week I plan to work with Jason on integrating the plotting software and validating my values. I’m also hoping that in the coming few days I can figure out what I’m missing with saving calibration, but here is what my serial monitor has been looking like after the initial calibration.
First we see the sensor at rest (there are a few offsets that will be adjusted later):
And here we have with some random movements (i.e. up/down, side/side, figure 8’s):
