CH340 USB to ESP8266 ESP-01/01S WIFI adapter board module red

Weight 0.016 kg
Dimensions 5 × 1.4 cm
Logic level


USB to serial TTL chip


Selectable working mode

On-board toggle switch

Working current

300mA(LDO regulator can supply)

Working voltage

4.5V – 5.5V (On-board 3.3v LDO Regulator)

Wireless Standard: 802.11b/g/n
Frequency Range: 2.4GHz-2.5GHz(2400M-2483.5M)
Data Interface: UART/HSPI/I2C/I2S/Ir Remote Control/GPIO/PWM
Operating Voltage: 3.0-3.6V(We recommended 3.3V)
Operating Current: Average 80mA
Operating Temperature: -40~125°C
Wireless Network Mode: station/softAP/SoftAP+station
Safety Mode: WPA/WPA2
Encryption Type: WEP/TKIP/AES
Network Protocol: IPV4,TCP/UDP/HTTP/FTP
[CH340 to ESP8266 Serial Adapter]
  • Used to connect the ESP-01 or ESP-01S modules to the USB port of your computer, to configure the modules by means of AT commands. In order for the USB interface to send the AT commands to the ESP8266 modules, they must have the factory firmware, otherwise they will not be able to receive the AT commands.
  • Selectable working mode: Instead of the toggle switch shown in the picture, there is a push button to switch between UART mode for serial TTL debugging by AT commands and PROG mode for firmware programming.