Testing Sensors

Follow these steps once, before running any of the 16 component tests.

Step 1: Power the Kit

• Plug the 9V/2A DC adapter into the DC INPUT (+9V) jack on the board.
  → This powers the entire system, including the ESP32 module and peripherals.

• A red or green power LED on the board should light up. If not, check the adapter.

Step 2: Connect ESP32 to Your Computer

• Use a USB cable (Type-A to Micro-B or USB-C, depending on your ESP32 Dev Module).

• Plug one end into your computer/laptop, and the other into the ESP32 Dev Kit (usually labeled “USB” or near CN1–CN3).

• The ESP32 will now receive both data and backup power via USB—but the main power must still come from the 9V adapter for reliable sensor operation.

Step 3: Install Arduino IDE (if not already installed)

• Download and install Arduino IDE from https://www.arduino.cc/en/software.

• Follow the instructions in “Instal Arduino IDE.pdf” (included in your kit package).

Step 4: Add ESP32 Board Support to Arduino IDE

⚠️ The ESP32 is not an Arduino Uno—it needs special setup!

1. Open Arduino IDE.

2. Go to File → Preferences.

3. In “Additional Boards Manager URLs”, paste: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json 

4.  Click OK.

5. Go to Tools → Board → Boards Manager.

6. Search for “ESP32”, then install “ESP32 by Espressif Systems”.

7. After installation, go to Tools → Board and select:

   • ESP32 Dev Module (or similar, e.g., “DOIT ESP32 DevKit V1”)

Step 5: Install Required Libraries

• Install all libraries listed in your kit’s documentation using one of the methods in “Cara menambahkan library ke Arduino IDE.pdf”:

  • LiquidCrystal_I2C

  • RTClib

  • DHT sensor library + Adafruit_Sensor

  • MFRC522

  • WiFiEsp (Note: For ESP32, you usually use built-in WiFi.h, but keep it if required)

  • And others as needed.

💡 Tip: Most test programs use standard ESP32 libraries—so double-check filenames!

Step 6: Locate Test Programs

• Open the “Program Testing” folder from your kit’s files.

• Each test has its own .ino file (e.g., TEST_1_4_TOMBOL_4_LED.ino).

Step 7: Select Correct Port

• With the ESP32 connected via USB:

  • Go to Tools → Port

  • Choose the correct COM port (Windows) or /dev/cu.* (macOS/Linux).

  • If unsure, unplug the USB, check the list, plug it back in, and see which new port appears.

✅ Now you’re ready!

1. Test 4 LEDs and 4 Buttons

• Action: Upload TEST_1_4_TOMBOL_4_LED.ino. Press each button one by one.

• Expected Result: The matching LED turns on when you press its button.

2. Test RGB LED and Buzzer

• Action: Upload TEST_2_BUZZER_RGB.ino.

• Expected Result: The buzzer beeps, and the RGB LED blinks red, then green, then blue.

3. Test I2C LCD (16x2)

• Action: Upload TEST_3_LCD_I2C.ino.

• Expected Result: The LCD screen shows: “Test Trainer Kit IoT ESP32”.

4. Test RTC (Real-Time Clock – DS1307)

• Action: Upload TEST_4_RTC.ino and open the Serial Monitor at 115200 baud.

• Expected Result: You see the current day, date, and time updating every second (e.g., Thursday, 18/9/2025 14:24:26).

5. Test MQ-2 Gas Sensor

• Action: Upload TEST_5_Gas_MQ2.ino and open Serial Monitor (115200 baud).

• Expected Result: You see analog and digital values. When you bring gas (like from a lighter) near the sensor, the numbers change.

6. Test PIR Motion Sensor

• Action: Upload TEST_6_PIR.ino and open Serial Monitor (115200 baud).

• Expected Result: When you wave your hand in front of the sensor, it prints “Motion detected!”.

7. Test 2-Channel Relay

• Action: Upload TEST_7_2RELAY.ino.

• Expected Result: The two relays click ON and OFF one after the other, repeating in a loop.

8. Test Servo Motor

• Action: Upload TEST_8_SERVO.ino.

• Expected Result: The servo arm rotates to different angles (like 0°, 90°, 180°) and then returns, repeating the motion.

9. Test RFID Reader (RC522)

• Action: Upload TEST_9_Membaca_RFID_TAG.ino, open Serial Monitor (115200 baud), and hold an RFID card/tag near the reader.

• Expected Result: The unique ID of the card appears in the Serial Monitor (e.g., ID: 43deda2c).

10. Test Ultrasonic Distance Sensor

• Action: Upload TEST_10_ULTRASONIC.ino and open Serial Monitor (115200 baud).

• Expected Result: It shows the distance to an object in centimeters (e.g., jarak: 14cm). Move your hand closer or farther to see the number change.

11. Test LM35 Temperature Sensor

• Action: Upload TEST_11_LM35.ino and open Serial Monitor (115200 baud).

• Expected Result: It displays the room temperature in °C (e.g., Temperature = 32.50°C).

12. Test Potentiometer

• Action: Upload TEST_12_POTENSIO.ino and open Serial Monitor (115200 baud). Turn the knob slowly.

• Expected Result: You see changing ADC values (0–4095) and voltage in millivolts (mV).

13. Test DHT22 (Temperature & Humidity)

• Action: Upload TEST_13_DHT22.ino and open Serial Monitor (115200 baud).

• Expected Result: It shows room temperature and humidity (e.g., Suhu=31.30 | Humi=76.10).

14. Test LDR (Light Sensor)

• Action: Upload TEST_14_LDR.ino and open Serial Monitor (115200 baud). Cover the LDR with your hand, then shine light on it.

• Expected Result: Analog values go down in bright light and up in darkness. Digital output changes between HIGH and LOW.

15. Test Infrared Obstacle Sensor

• Action: Upload TEST_15_INFRARED.ino and open Serial Monitor (115200 baud). Place an object in front of the sensor.

• Expected Result: It prints “Obstacle detected!” when something blocks the infrared beam.

16. Test Wi-Fi Connection

• Action: Open TEST_16_WiFi.ino, replace "YOUR_WIFI_NAME" and "YOUR_WIFI_PASSWORD" with your network details, then upload. Open Serial Monitor (115200 baud) and press the ESP32 reset button if needed.

• Expected Result: It connects to Wi-Fi and prints:

  • “WiFi terhubung!”

  • An IP address like xx.xxx.xx.x00

  • Open that IP in a web browser on the same network to see a simple control page.