We’ve been putting off getting a Feather board designed using the ESP32-S2, and, well, it’s the last day of the year so why not make it our last design of 2020? The ESP32-S2 mini modules make an easy job of this board, its very compact and the pins lined up perfectly (don’t you love when that happens) so that the IO numbers match the Feather pinout we prefer. We even got the high speed SPI pins on the SPI port, and the two DAC pins on A0 and A1. Given that we don’t need a USB to serial converter, and flash memory is built into the ‘mini, we had lots of space left in the middle. We ended up deciding on putting in a LC709203 battery monitor and a BMx280 sensor footprint that can place DPS310, BMP280 or BME280. For adding other sensors we have a vertical-style STEMMA QT in the center. The current mini modules have 4mbyte flash and no psram, but given the existence of ESP32-S2FN4R2 we hope it’ll eventually happen.
Eink, E-paper, Think Ink – Collin shares six segments pondering the unusual low-power display technology that somehow still seems a bit sci-fi – http://adafruit.com/thinkink
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