ESP8266 - 12F Node MCU CH340

Specifications

• Input Voltage: 7 – 12V
• Operating Voltage: 3.3V
• CPU: 32-bit RISC Tensilica Xtensa LX106 running at 80 MHz
• 64 KB of instruction RAM, 96 KB of data RAM   (80x Arduino UNO!)
• 512 KB of EEPROM (512x Arduino UNO!)
• External QSPI flash – 512 KB to 4 MB* (up to 16 MB is supported)
• IEEE 802.11 b/g/n Wi-Fi
  • Integrated TR switch, balun, LNA, power amplifier and matching network
  • WEP or WPA/WPA2 authentication, or open networks
• Digital I/O Pins (DIO): 16
• Analog Input Pins (ADC): 1
• UARTs: 1 on dedicated pins, plus a transmit-only UART can be enabled on GPIO2
• SPIs: 1
• I2Cs: 1
• Flash Memory: 4 MB
• SRAM: 64 KB
• Clock Speed: 80 Mhz
• 80 Mhz clock (5x arduino UNO or mega!)