ESP8266 ESP-01 Serial WiFi Wireless Adapter Module

The ESP8266 ESP-01 Adapter is used for easier interfacing with the ESP8266 ESP-01 WiFi modules that can be used for wireless communications.

The ESP8266 ESP-01 are WiFi modules that can be used for wireless communications. They operate at 3.3V for power and require up to 170mA of current.

If you are using the ESP-01 module with a 5V MCU, the current requirements are outside what an Arduino or similar MCU can supply directly from their small on-board 3.3V regulator. This adapter can be powered off of 5V-12V and supplies well regulated 3.3V to the ESP-01 socket.

It also provides level shifting for the TX/RX lines which is necessary for the safe operation of this module with a 5V MCU since the I/O of the ESP-01 is not 5V tolerant.

The adapter also provides 3.3V to the CH_PD pin. The RST pin is left floating which is normal.

Features:

• On-board level shift circuit
• 3.3V Voltage Regulator; 5V to 3.3V Logic Level Shifting
• Interface logic voltage: 3.3V / 5V compatible(On-board level shift circuit)
• Working voltage: 4.5 – 5.5V (Onboard 3.3V LDO Regulator)
• Pin Definition: GND,VCC,TX,RX
• Working current: 0 – 240mA

Specifications: