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Specifications

Categories Items Parameters
WiFi Standard CCC/FCC/CE/TELEC/SRRC
Protocols 802.11 b/g/n
Frequency Range 2.4G~2.5G (2400M~2483.5M)
Hardware MCU Xtensa L106
RAM 50K
Flash 4MB
Peripheral Interface UART/SDIO/SPI/I2C/I2S/IR Remote Control
GPIO/PWM
Power Supply 4.5V~9V(10VMAX),Support USB power supply
Operating Voltage 3.0~3.6V
Operating Current Average: 80mA(200mA MAX)
Standby Current <200uA
Transmission Rate 110-460800bps
Port Driving Capability 15mA
Operating Temperature Range -40℃~+125℃
Storage Temperature Range -40℃~+125℃
Board Size 48mm x 26mm
Weight ~7g
Software Wi-Fi Mode Station/SoftAP/SoftAP+Station
Security WPA/WPA2
Encryption WEP/TKIP/AES
Firmware Upgrade UART Download/OTA (via network)

Download and Write Firmware via Host

SoftwareDevelopment Supports Cloud Server Development/

SDK for Custom Firmware Development

Network Protocols IPv4,TCP/UDP/HTTP/FTP
User Configuration AT Instruction Set,Cloud Server,Android/iOS App

 

You have 3 possibilities for a power supply of the NodeMCU:

  1. Operate the NodeMCU on the 3.3V input with 2.5V to 3.6V
  2. Operate the NodeMCU on the 5V input with 5V to 9V
  3. Use a USB cable with 5V. A diode prevents current from the 5V input to the USB connection flows.

The built-in voltage regulator has a maximum power reserve of 300mA for external expansions at 5V input voltage.

 파일>예제> ESP8266Wifi> WiFiScan

 

How fast does it execute the loop? It depends on which Arduino board you’re using, but an Arduino Uno has a clock speed of 16 megahertz. So that means that 16 million instructions are happening every second on the Arduino!