What's it

A CP2104 3.3V USBToUART converter support 400mA+ current. Program ESP8266/ESP32 module just like NodeMCU. It has smaller size than rev2 and we make it breadboard friendly. You can also use the flasher to programming ESP32 without pushing flash button.

Why did you make it?

The converter supports 400mA+ current. It's good for programming ESP8266 and ESP32 module

For program with Arduino IDE, the circuit does the trick for auto reset. Thanks for NodeMCU team!

Diagram pictures

Features

  • Based on CP2104
  • ESP8266 and ESP32 supported
  • Breadboard friendly
  • A Reset button and a flash button
  • No need press reset button when programming esp8266 / esp32 with Arduino IDE
  • Operating voltage:3.3V
  • System support:Windows 98SE/2000/XP/Vista/Window7/Mac OS 9/Mac OS X/Linux 2.40
  • Output current:400mA+ (a MIC5219 LDO)

Pinouts

For programming other ESP8266 modules such as ESP-12 or ESP-07, wire the pins like these:

flasher pin ESP module pin
VCC VCC
GND GND
TXD RXD
RXD TXD
RST RST
GPIO0 GPIO0
CH_EN CH_EN or CH_PD

For ESP32

flasher pin ESP module pin
VCC VCC
GND GND
TXD RXD
RXD TXD
RST EN
GPIO0 GPIO0
CH_EN Not wire