ESP32-C2

[中文]

The ESP32-C2 downloads firmware via UART0 (TXD (GPIO20) and RXD (GPIO19) ) by default.

Hardware Connection

The following wiring conditions need to be satisfied:

VDD     -> 3V3
GND     -> GND
EN      -> Pull Up    (Used for power on Control, can't be float)
GPIO8   -> Pull Up    (Default is float)
GPIO9   -> Pull Down  (Default is high level)
TXD0(GPIO20)    -> RX
RXD0(GPIO19)    -> TX

Note

  • After powering up the chip/module, you can verify whether it has entered Download Boot mode by using the UART0 serial port.

  • The strapping combination of GPIO8 = 0 and GPIO9 = 0 is invalid and will trigger unexpected behavior.

Hardware conditions must be met

  • ESP32-C2 chip working voltage range is 3.0 V ~ 3.6 V; if you use a single power supply, the recommended voltage of the power supply is 3.3 V, and its recommended output current is 500 mA or more.

  • ESP32-C2 modules working voltage range is 3.0 V ~ 3.6 V; if you use a single power supply, the recommended voltage of the power supply is 3.3 V, and its recommended output current is 500 mA or more.

Reference

Summary of Hardware Wiring Principles:

Official Documentation: