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
NodeMCU 1.0 (ESP-12E Module) Pinout
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Uses a CP2102 bridge - install the CP210x driver if no port appears. Not detected? Hold BOOT while plugging in.
2
Match & flash
Set the Tools options shown, then click Upload.
3
Verify it runs
GPIO2 toggles - wire an LED and resistor to it, or change the pin to your board's own LED.
Set these in Tools · leave everything else at default
Arduino IDE 2.x - Tools Copy
Board: "Generic ESP8266 Module"▸
Flash Size: "4MB (32Mb)"▸
CPU Frequency: "160 MHz"▸
Upload Speed: "921600"▸
▸ every other Tools option - leave at default
Board: Generic ESP8266 Module Flash Size: 4MB (32Mb) CPU Frequency: 160 MHz Upload Speed: 921600
Find it: Tools ▸ Board ▸ ESP8266 Boards ▸ Generic ESP8266 Module
// toggle GPIO2 - wire an LED and resistor to it
void setup() {
pinMode(2, OUTPUT);
}
void loop() {
digitalWrite(2, HIGH); delay(500);
digitalWrite(2, LOW); delay(500);
}Specifications
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 (software) · 1
PWM
-
Power
USB
Micro-USB
Serial
CP2102
Boot address
0x0000
Electrical
Input
5V via USB · 3.3V logic
Consumption
-
Regulator
AMS1117-3.3
Flashing
Upload · OTA
esptool · esp_ota
Flash · Boot mode
DIO · -
Sketch · Data
- · 80 KB
Dimensions
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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