View source for Uploading IoT Application From Command Line

== Upload Code to NodeMCU (ESP8266) Using CMD ==

=== Prerequisites ===
# Install Python from https://www.python.org/downloads (Check "Add Python to PATH")
# Install required tools:
<code>
pip install esptool pyserial
</code>
# Install Arduino IDE: https://www.arduino.cc/en/software

=== Step 1: Compile the Sketch ===
# Open the sketch in Arduino IDE
# Select board: <code>NodeMCU 1.0 (ESP-12E Module)</code> under Tools → Board
# Go to Sketch → Export Compiled Binary
# A <code>.bin</code> file will be generated in the sketch folder

=== Step 2: Find the COM Port ===
# Plug in NodeMCU
# Open Command Prompt and type:
<code>
mode
</code>
# Look for a line like <code>Status for device COM3:</code>

=== Step 3: Flash the Code ===
# Open CMD and go to the folder where the .bin file is located:
<code>
cd "C:\Users\YourName\Documents\Arduino\MySketch"
</code>
# Upload the binary to NodeMCU:
<code>
python -m esptool --port COM3 --baud 115200 write_flash 0x00000 MySketch.ino.bin
</code>

=== (Optional) Erase Flash Before Upload ===
<code>
python -m esptool --port COM3 erase_flash
</code>

=== Step 4: View Serial Output (Serial Monitor) ===
# Open CMD and run:
<code>
python -m serial.tools.miniterm COM3 115200
</code>
# To exit, press <code>Ctrl + ]</code>

=== Notes ===
* Make sure the COM port matches the one detected
* Close Arduino Serial Monitor before using miniterm
* Ensure <code>Serial.begin(115200)</code> in your sketch matches the miniterm baud rate