Since the ESP8266 came on the scene a few years ago ... with this project which turns the ESP32 into a USB host. USB is not a native feature on all microcontrollers or even Arduino-compatible ...
USB is a solution for both of these ... [ajlitt] dug up an SDIO driver for the ESP8089 chip, and found that you can liberate the ESP8266’s SPI bus by removing a flash memory chip that’s ...
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