NodeMCU 1.0 (ESP-12E Module)
Widely-used ESP8266 board with USB and full pin access - perfect for Arduino-based IoT development.
49 × 26 mm
ESP8266
MCU
160MHz
clock
4MB
flash
~80KB
SRAM
17· 1 ADC
GPIO
Wi-Fi
radio
Pinout
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Serial chip: CP2102. Not detected? Hold BOOT while plugging in.
2
Flash with your tool
Arduino IDE, PlatformIO, ESPHome or esptool - copy the settings on the right.
3
Verify it runs
The blink example uses GPIO8 - swap for your board's LED pin if different.
Board: Esp8266 Nodemcu Esp12e
Flash Size: 4 MB · DIO
Upload Speed: 921600
// blink
pinMode(8, OUTPUT);
digitalWrite(8, LOW); // on (often inverted)[env:nodemcuv2]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32:
board: esp32dev
variant: nodemcu
framework:
type: esp-idf
# blink - GPIO8
output:
- platform: gpio
pin: 8
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesptool.py --chip esp8266 --port /dev/ttyACM0 \
write_flash 0x0 firmware.binSpecifications
ESP8266 · 49 × 26 mmCompute
MCU
ESP8266
Clock
160 MHz
SRAM · Flash
~80 KB · 4 MB
Radio
Wi-Fi
802.11 b/g/n
Bluetooth
-
Antenna
PCB
I/O
GPIO · ADC
17 · 1
UART · I²C · SPI
2 · 1 · 2
PWM
-
Power
USB
Micro-USB
Serial
CP2102
Boot address
0x0000
Flashing
Upload · OTA
esptool · esp_ota
Flash · Boot mode
DIO · -
Sketch · Data
- · 80 KB
49 × 26 mm · pin pitch 2.54 mm
The NodeMCU 1.0 (ESP-12E Module) uses esptool for firmware uploads, esp_ota for over-the-air (OTA) updates. Flash mode is DIO.
About this board
The NodeMCU 1.0 (also known as NodeMCU v2, NodeMCU ESP-12E, or NodeMCU ESP8266) is a low-cost Wi-Fi development board built around Espressif's ESP8266 on the ESP-12E module, with 4 MB of flash. Onboard USB-to-serial is handled by a CP2102 or CH340 chip depending on the variant, and its breadboard-friendly, roughly 30-pin dual-row layout breaks out the ESP8266's GPIOs for easy prototyping. It's a popular choice for Wi-Fi IoT, home automation, and general prototyping projects. In this guide, you'll find the NodeMCU pinout, datasheet, technical specs, and setup instructions.
Resources
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