we really like the esp32 pico v3 02 module, we just used it in in our new Feather ESP32 V2 (shhh don’t tell anyone but we’ve put the preliminary page for signups up on the site at https://www.adafruit.com/product/5400 it packs all that ESP32 dual core joy with 8MB flash and 2MB psram. we are now thoroughly addicted to psram for iot projects. buffering enormous files for post-parsing is so so so much better than what we had to do with low-ram chips: scanning the input for a string match to try and hand-parse XML or json. this module is tinier than the esp32-s2 or s3 mini modules and..hey check it out! it’s itsybitsy-sized. it nestles right between the two rows of headers. maybe we could revive our esp32 itsybitsy….?
this draft has the classic itsy pinout: a 5V-level-shifted out on pin 5, lots of GPIO, extra user button, neopixel, and since we were sorta forced to double-side the board (there’s just no way the CP2102 would fit on top with the module and reset button) we went and tossed a STEMMA QT port on the top. it’s a four layer board cause now we’ve started doing them, they sorta solve a lot of routing complexity and we’re feeling a bit lazy 🙂
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