This week, our team spent most of the time preparing for the design review presentations. In addition, we continued work on the firmware, software, and hardware. We prototyped the screen interface, and after confirming the details of the hardware interface, the PCB’s schematic is complete.
Overall, this is a relatively low-risk project. Currently, the most significant risks are that Bluetooth won’t transfer data fast enough, and that integrating all of our features will take longer than expected. These risks will be managed by testing things in isolation and as soon as possible before integrating into the rest of the system.
One change from a prior hardware design is the decision to not rely on on-board or external flash, but rather to use a microSD card. This, while less elegant, should be more robust and easier to use and debug since we will be able to directly read and write the data on the SD card.
There are no changes to our schedule, we could probably do with picking up the pace a bit, but I wouldn’t say we’re behind schedule.