Chintan Vaishnav Project: Objective: To produce field-deployable low cost agricultural sensors integrated with DYI tutorial. Stretch Objective: Integrate sensor readings with an android phone. Constraint: Must be manufacturable using a milling machine and basic molding and casting.
What questions need to be resolved?
How to calibrate load and txrx capacitive sensors (samples to moisture content)?
How does the casing affect capacitance?
What is the best way to deploy probes? Should they be permanently deployed or deployed on-demand?
What is the best way to get electronics as close to probe as possible?
What is the most efficient way to manage power?
Processing and Storage
How much history of readings, if any, should stored be on the card?
Where should be the routine for converting digital signal to moisture values reside?
How much history is relevant to keep?
What is the most intuitive way to display results?
What is the best language-agnostic tutorial that can be created?
How does moisture relate to crop yield? Can we derive intuition about what information to display from there?
What tasks need to be completed?
Board redesign to incorporate basic debugging using LEDs
User Interface (Android?)
Creating a tutorial
What has worked? What hasn't?
Sensors are working. User interface is under control on Mac (but the Mac is with Police :). Have not worked on android yet.
Getting started on calibration and testing. Know how to turn readings into capacitance. Don't yet know how to turn capacitance into moisture.
Have to make casing. Don't yet know about ideal casing.
Have to produce tutorial
What will happen when?
Wednesday - Board Redesign
Thursday, Friday - Calibration and Testing
Saturday – GUI
Monday – Tutorial
Demand- vs supply-side time management Designing with parts in the lab Time triage ? Spiral development
Experiment with the most basic sensors (Neil's), acrylic casing, simple calculations, and text based Uis
Write a tutorial
Documentation during development
Document iterations of board design
Comment the code
Document calibration procedure and references
Sanity test cases and results
Enable UI with use instructions