NodeMCU 0.9 (ESP-12 Module) is a development board based on the ESP8266 microcontroller using XTENSA LX106 architecture.
This board features a maximum CPU frequency of 160 MHz and 4 MB flash memory.
About NodeMCU 0.9 (ESP-12 Module)
First-gen NodeMCU ESP8266 board - large form factor, ideal for development and prototyping.
📋 Technical Specifications
Complete technical specification details for NodeMCU 0.9 (ESP-12 Module)
🛰️ Connectivity
WiFi 802.11 b/g/n (2.4 GHz)
Bluetooth -
BLE -
🧠 Microcontroller
Model esp8266
Clock Speed 160 MHz
Flash Size 4 MB
Architecture Xtensa LX106
NodeMCU 0.9 (ESP-12 Module) Pinout Diagram
Complete pin reference for NodeMCU 0.9 (ESP-12 Module)
Useful Links
Datasheets and resources for NodeMCU 0.9 (ESP-12 Module)
Pin Mappings
Complete pinout and GPIO mapping for NodeMCU 0.9 (ESP-12 Module)
Digital I/O Pins
Interrupt Pins
Analog Inputs
| Pin | Analog | Touch | PWM | Other |
|---|---|---|---|---|
| 0 | ||||
| 1 | ||||
| 2 | LED_BUILTIN | |||
| 3 | ||||
| 4 | ||||
| 5 | ||||
| 12 | ||||
| 13 | ||||
| 14 | ||||
| 15 | ||||
| 16 | LED_BUILTIN_AUX | |||
| PIN_WIRE_SDA | SDA | |||
| PIN_WIRE_SCL | SCL |
Legend
A0 Analog input
T0 Touch sensor
PWM PWM capable
RX/TX Serial pins
LED Built-in LED
# Pin number
Default Tools & Configuration
Build and upload settings for NodeMCU 0.9 (ESP-12 Module)
| Setting | Value |
|---|---|
| Uploader tool | esptool |
| Flash mode | qio |
| Maximum data size | 80 KB (81920 bytes) |
Configuration Summary
The NodeMCU 0.9 (ESP-12 Module) uses esptool for uploads , and bootloader at .
Flash mode: qio | Boot mode:
