ESP32 Dev Board Quick Test

Environment: Visual Studio Code, PlatformIO
Hardware: USB-C, ESP32-WROOM-32D

1. 1. Create a new PlatformIO project, select general Espressif ESP32 Dev Module
   2. 
   3. Select default location or any other location to save the project
   4. Modify the platformio.ini file to add monitor_speed and upload_speed:
   5. [env:esp32dev]
      platform = espressif32
      board = esp32dev
      framework = arduino
      monitor_speed=115200
      upload_speed=921600
   6. modify src->main.cpp as:
      #include <Arduino.h>

      #define OUTPUT_PIN 13      //

      #define INPUT_PIN 4       // Can put a switch on this pin

      void setup() {

        Serial.begin(115200);

        pinMode(OUTPUT_PIN, OUTPUT);

        pinMode(INPUT_PIN, INPUT_PULLUP); // Button input with pull-up

        Serial.println(“ESP32 Pin Test”);

      }

      void loop() {

        digitalWrite(OUTPUT_PIN, HIGH);

        Serial.println(“High Voltage”);

        delay(1000);

        digitalWrite(OUTPUT_PIN, LOW);

        Serial.println(“Low Voltage”);

        delay(1000);

        // Read input pin state

        int buttonState = digitalRead(INPUT_PIN);

        Serial.print(“Input Pin State: “);

        Serial.println(buttonState);

      }

Use a multimeter to measure the voltage at Pin 13 and observe the output in the Serial Monitor.