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USB UART TTL for ESP8266

This is a compact CP2102N-based USB Type-C TTL UART breakout board that also includes the DTR and RTS pins needed for button-free programming of the ESP8266.

image of board

USB TTL UART adapters available on the market have issues:

  • The smaller adapters that have a Type C port don't break out the DTR & RTS pins
  • The adapters that do break out DTR & RTS pins also break out a bunch of other unneeded pins, and they're large & bulky. They also have a micro-USB port instead of Type C.

This adapter breaks out all pins needed for efficient ESP8266 development while remaining as compact as possible.

This was created in 2021; the market may have more suitable offerings available at this point.

See bom.xlsx for the list of parts to order from LCSC or for JLCPCB assembly. pos.xlsx is the part positioning file for JLCPCB assembly.