What's it

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

ESP Flasher Rev5 - USB Type-C

ESP Flasher Rev5

ESP Flasher Rev4 - Micro USB

ESP Flasher Rev4

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.

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/Windows 10/Mac OS/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:

For ESP8266

flasher pin ESP8266 pin
VCC VCC
GND GND
TXD RXD
RXD TXD
RST RST
GPIO0 GPIO0
CH_EN CH_EN or CH_PD

For ESP32

flasher pin ESP32 pin
VCC VCC
GND GND
TXD RXD
RXD TXD
RST EN
GPIO0 GPIO0
CH_EN Not wire