Workin' on a future breakout - this one is an ESP32 breakout board for use with CircuitPython boards as a co-processor or maybe if you want something compact and no USB-serial converter. I use a Teensy 3.6 with SD card to write the test firmware over serial using the ROM bootloader, run some tests, and then burn the final firmware. It's slower than command line, but easier to run two at a time, so ... think this is going to work out!

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