Recently, I had an opportunity to dive into ST Micros’ ultra small Sensor Tile — 13 mm by 13 mm. If you have not had an opportunity to work with them, you can get one here: http://www.st.com/en/evaluation-tools/steval-stlkt01v1.html
As you can see below, comparing the Sensor Tile (top right) to the NodeMCU or Pi Zero, tells you the size we are talking about.
One of my customers wanted to track movement using 2 sensors, to compare and contrast and calculate differences between the two.
These little sensors really perform, and as such we had to perform edge summarization. Each sensor produced over 100 movements per second — clearly creating, at scale, a bandwidth (and cost) concern.
To address this need, and working with ST Micro, I have connected 2 SensorTiles (via Bluetooth LE) to a third, which is connected to a Raspberry Pi Zero (via Serial). The PI takes the serial…
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