Add note that get_idf must be run before all idf.py commands

README.md

@@ -30,9 +30,36 @@ High-performance UDP traffic generator firmware for ESP32 devices with interacti
 - Python 3.7+ (for deployment scripts)
 - USB serial connection to ESP32 device
 
-### Building
+### ESP-IDF Setup
+
+Add this function to your `~/.bashrc` or `~/.zshrc` to activate ESP-IDF v6:
 
 ```bash
+# ESP-IDF v6 activator
+get_idf() {
+  export IDF_PATH="$HOME/Code/esp32/esp-idf-v6"
+  export IDF_PYTHON_ENV_PATH="$HOME/.espressif/python_env/idf6.0_py3.11_env"
+  export IDF_TOOLS_PYTHON="$IDF_PYTHON_ENV_PATH/bin/python"
+  export PATH="$IDF_PYTHON_ENV_PATH/bin:$PATH"
+  export PYTHONNOUSERSITE=1
+  . "$IDF_PATH/export.sh"
+  hash -r
+  echo "ESP-IDF : $(idf.py --version 2>/dev/null)"
+  echo "python  : $(python --version)"
+  echo "idf.py  : $(command -v idf.py)"
+}
+```
+
+After adding the function, reload your shell configuration and run `get_idf` to activate the ESP-IDF environment.
+
+### Building
+
+**Note:** All `idf.py` commands require the ESP-IDF environment to be activated first by running `get_idf`.
+
+```bash
+# Activate ESP-IDF environment (required before all idf.py commands)
+get_idf
+
 # Set target (e.g., esp32c5, esp32s3, esp32)
 idf.py set-target esp32c5