Added the cpp and platformio.ini

README.md

@@ -1,2 +1,15 @@
 # esp32-simple-test
 
+## IDE
+
+### PlattformIO
+A PlatformIO ```platformio.ini``` is included with the uncommented part being for an ```ESP-32D``` and the commented part for ```ESP32-C3```
+
+### ArduinoIDE
+You need to configure the ESP32 you are using. But keep in mind that for some the ```CDC_ON_BOOT``` may be disabled by default and needed to be renabled.
+
+## License
+This project is licensed under the Apache License 2.0 - see the [LICENSE](./LICENSE) file for details.
+
+### AI
+Portions of this code were generated with the assistance of ChatGPT (OpenAI GPT-5).

platformio.ini

@@ -0,0 +1,37 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+; [env:esp32-c3-devkitm-1]
+; platform = espressif32
+; board = esp32-c3-devkitm-1
+; framework = arduino
+
+; monitor_speed = 115200
+
+; build_flags =
+;     -DARDUINO_USB_CDC_ON_BOOT=1
+;     -DARDUINO_USB_MODE=1
+
+; lib_deps =
+;     adafruit/Adafruit SSD1306 @ ^2.5.7
+;     adafruit/Adafruit GFX Library @ ^1.11.7
+
+[env:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+upload_speed = 115200
+monitor_speed = 115200
+
+; Explicit flash settings for stability
+board_build.flash_mode = dio
+board_build.flash_size = 4MB
+board_build.flash_freq = 40m
+

src/main.cpp

@@ -0,0 +1,21 @@
+#include <Arduino.h>
+
+void setup() {
+  // USB CDC Serial (enabled by ARDUINO_USB_CDC_ON_BOOT)
+  Serial.begin(115200);
+
+  // Optional: wait until host opens the port
+  while (!Serial) {
+    delay(10);
+  }
+
+  Serial.println("✅ ESP32-C3 USB CDC Serial is enabled!");
+}
+
+void loop() {
+  static uint32_t counter = 0;
+
+  Serial.print("Loop counter: ");
+  Serial.println(counter++);
+  delay(1000);
+}