Piecing things together and checking out some datasheets. Seems like an opportune time to add a more detailed overview and give structure to my project. I like to start with a basic flow diagram since its provides a quick visual representation of the system.
I've chosen the CC3200 as the base for my IoT sensor nodes. It has a 4 channel 12-bit ADC which I intended to make use of. Three air quality sensors have been chosen based on common air pollutants, size and cost. Part of my engineering design goals are to keep the form factor small (and ultimately pocket portable) while keeping cost to a minimum. For my air intake, I will be using a very cool piezoelectric air pump which will be driven using a PWM signal from the CC3200. The system will run from two AA batteries so a boost converter (TPS61200) will be used to generate the required 5V rail.
My next post will contain a project timeline which will include all the tasks that need to be performed and target competition dates. I intend to break the design components into sub-modules and integrate the final working system onto a single PCB. I imagine getting the CC3200 running and publishing data to the cloud as my first step. This would be followed shortly thereafter by a schematic. Once that is complete, I plan on prototyping the hardware on a launchpad break-out board.
