NodeMCU: Difference between revisions
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= Basics =
*Technical specifications:
CPU frequency: 80MHz, overclockable to 160MHz
Total RAM available: 96KB (part of it reserved for system)
BootROM: 64KB
Internal FlashROM: None
External FlashROM: code and data, via SPI Flash. Normal sizes 512KB-4MB.
GPIO: 16 + 1 (GPIOs are multiplexed with other functions, including external FlashROM, UART, deep sleep wake-up, etc.)
Programming: using BootROM bootloader from UART.
Due to external FlashROM and always-available BootROM bootloader, ESP8266 is not brickable.
*The NodeMCU ESP8266 board has 30 pins connected to the development board.
*Out of the 30 pins, 17 are GPIO pins.
*These GPIO pins can be used as:
ADC Channel: 10-bit ADC (Analog to Digital Converter) channel
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