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An ESP-01 or ESP-01S module on its own has no USB port, so flashing new firmware or just watching its serial debug output normally means wiring up a separate USB-to-serial converter and getting the pinout right every time. This adapter solves that by giving the module its own dedicated socket, built around the CH340C USB-serial chip, so plugging the ESP-01/01S straight into it and connecting a USB cable is all it takes to start flashing or debugging.
| Brand | Generic |
|---|---|
| Selling unit | PCS |