The most significant risk that could jeopardize the success of the project is still the motion sensor since we have still been struggling to find one that would work for our intended purpose. However, this risk has been managed since we were able to find an old mouse lying around and break that apart to take the motion sensor from it. So we will spend time testing that to make sure it works for our intended purpose. If not our only backup so far is to try to get the IMU to effectively track linear motion which has not provided the best results so far since it does not work very well on small movements. Further testing of this will be done just in case.
The only thing that’s changed with our design this week is that instead of building a conversion module from the ground up, we found a Python library called pygame that interfaces with our computer OS to do 1-to-1 CPI-pixel mapping. We will be using this library for the base of our stylus data interfacing after BLE communication. We also may need to change our design depending on which motion sensor we end up choosing. The reason for this is the one we originally wanted is too hard to find and we are still testing the current one we found. The good thing is all of the motion sensors work relatively the same with slightly different resolutions so the cost for switching is lower resolution but that should not be too much of a problem since we were planning on working on the lowest resolution anyway to start. Overall we can still make it work with mostly any mouse motion sensor we find.
Here is the updated schedule: 18-500 Gantt chart – Gantt Chart