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:
- Operate the NodeMCU on the 3.3V input with 2.5V to 3.6V
- Operate the NodeMCU on the 5V input with 5V to 9V
- 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!
