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 circuit3.3V Voltage Regulator; 5V to 3.3V Logic Level ShiftingInterface 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,RXWorking current: 0 – 240mASpecifications:Working voltage4.5 – 5.5VInterface logic voltage3.3V / 5VWorking current0 – 240mAInterfaceUARTNumber of Pins4 (VCC,GND,TX,RX)Product Dimensions42 x 24mmProduct Weight5 grams