ESP32 Quiz by azka.xdlabin QuizMarch 3, 2025 ESP32 Quiz 1 / 60Which function checks if ESP32 is connected to Wi-Fi? WiFi.check() WiFi.status() WiFi.connected() WiFi.signal() 2 / 60Which communication interfaces does ESP32-WROOM-32 support? SPI, RS485, Ethernet UART, HDMI, PCIe USB, RS232, VGA UART, SPI, I2C 3 / 60How many GPIO pins are typically available on the ESP32 DevKit board? 34 10 54 20 4 / 60What problem can occur if the CP2102 driver is not installed on a computer? ESP32 will not power on The ESP32 will not be recognized by the computer The Wi-Fi module will not work The ESP32 will overheat 5 / 60In BLE, what is the purpose of a "Characteristic"? Transfers data between server and client Assigns power levels Used to identify the device Stores Wi-Fi credentials 6 / 60How can you install ESP32 board support in Arduino IDE? Through Tools > Manage Libraries It is built-in automatically Using the Board Manager URL By downloading an EXE installer 7 / 60Which company manufactures the ESP32-WROOM-32 module? Microchip Espressif Systems Atmel Texas Instruments 8 / 60What is the default Wi-Fi mode of ESP32 when it powers up? OFF AP+STA mode AP mode STA mode 9 / 60Which command reads the value of a digital input pin? inputRead() readInput() digitalRead() getPinValue() 10 / 60How do you print text to the Serial Monitor in ESP32 Arduino code? monitor.write("text") print("text") Serial.println("text") console.log("text") 11 / 60How do you get the IP address of ESP32 after connecting to Wi-Fi? WiFi.IP() WiFi.localIP() WiFi.getIP() WiFi.myIP() 12 / 60What is the function to create a Wi-Fi access point? WiFi.apStart() WiFi.softAP() WiFi.apBegin() WiFi.startAP() 13 / 60What is the purpose of delay(1000); in ESP32 Arduino code? Turns off power for 1000 ms Reads pin 1000 Waits for 1000 milliseconds Waits for user input 14 / 60Which pins on the ESP32 can be used for touch sensing? GPIO 0 to 10 Only GPIO 13 Touch-capable GPIOs (e.g., T0 to T9) GPIO 32 to 39 15 / 60What is the maximum number of BLE connections ESP32 can typically support as a server? 4 3 1 7 16 / 60What function is used to connect ESP32 to a Wi-Fi network? WiFi.begin() WiFi.link() WiFi.attach() WiFi.connect() 17 / 60What is the default operating voltage of the ESP32-WROOM-32 module? 5V 12V 1.8V 3.3V 18 / 60Which of the following can ESP32 act as? Wi-Fi Station Neither A nor B Both A and B Wi-Fi Access Point 19 / 60What function is used to disconnect from Wi-Fi in ESP32? WiFi.end() WiFi.stop() WiFi.disconnect() WiFi.shutdown() 20 / 60What is the typical range of Wi-Fi for ESP32 in open space? 10–20 meters 50–100 meters 200–300 meters 1 km 21 / 60Which USB driver is usually required for ESP32 on Windows? GPIO bridge driver FTDI FT232R Arduino AVR driver CH340 or CP210x USB to UART driver 22 / 60On Windows, where can you check if the CP2102 driver is installed correctly? Device Manager Task Manager Registry Editor File Explorer 23 / 60What is the maximum voltage ESP32 GPIO pins can tolerate? 5V 3.3V 12V 1.8V 24 / 60Which pins should be avoided during boot because they affect the boot process? GPIO 21, 22 GPIO 2, 4, 5 GPIO 6 to GPIO 11 GPIO 18, 19 25 / 60Which library is used in Arduino IDE to connect ESP32 to Wi-Fi? ESP32WiFi.h WiFiClient.h Ethernet.h WiFi.h 26 / 60Which driver is required for the CP2102 chip on Windows systems? CP210x USB to UART Bridge VCP Driver CH340 Driver Arduino USB Driver FTDI Driver 27 / 60What is the purpose of a DAC in ESP32? Digital signal amplification Convert digital to analog signals Reset pin values Data access control 28 / 60What is the function of the CP2102 chip in ESP32 development boards? It provides USB-to-Serial communication It controls GPIO pins It converts 5V to 3.3V It manages Wi-Fi connectivity 29 / 60What is the correct baud rate commonly used for ESP32 serial communication? 4800 250000 9600 115200 30 / 60What is the resolution of the ADC in ESP32 by default? 12-bit 8-bit 16-bit 10-bit 31 / 60What keyword is used to define a constant pin number? define const int pinDef static 32 / 60Which library is commonly used for Classic Bluetooth in Arduino IDE? BLEDevice.h BluetoothSerial.h BluetoothClassic.h WiFiSerial.h 33 / 60What is the purpose of the "Boot" button on ESP32 boards? It resets Wi-Fi settings It opens a menu It opens the serial monitor It enters firmware upload mode 34 / 60Which library is used to implement BLE on ESP32? BLESerial.h BluetoothLowEnergy.h BLEDevice.h ESPBLE.h 35 / 60What is the maximum clock speed of the ESP32-WROOM-32? 120 MHz 240 MHz 160 MHz 80 MHz 36 / 60Which file is used to configure board settings in Arduino IDE for ESP32? setup.ini boards.txt platform.ini board_config.json 37 / 60Which function is used to generate PWM signals on a GPIO pin in Arduino? setPWM() pwmOut() analogWrite() digitalPWM() 38 / 60What function is used to set the mode of a GPIO pin in ESP32? setPinMode() pinMode() definePin() gpioMode() 39 / 60What is the role of a "BLE Server" on ESP32? It connects to Wi-Fi networks It connects to other devices and receives data It advertises services and sends data to clients It stores data in flash 40 / 60What types of Bluetooth are supported by ESP32? Classic only BLE only None Both Classic and BLE 41 / 60If the ESP32 board is not detected on Linux, which command can help check connected USB devices? usbconfig dmesg | grep serial lsusb Both A and C 42 / 60Which ESP32 function sets the duty cycle for PWM output? analogWrite(pin, value) digitalWrite(pin, HIGH) pwmSet(pin, value) setDutyCycle(pin, value) 43 / 60Which company manufactures the ESP32 chip? Atmel Intel Espressif Systems Microchip 44 / 60What is the core processor used in ESP32-WROOM-32? AVR Xtensa LX6 RISC-V ARM Cortex-M3 45 / 60What is the typical range of BLE communication for ESP32? 5–10 meters 500 meters 100–200 meters 10–30 meters 46 / 60What UUIDs are used for in BLE communication? Set device frequency Define services and characteristics Identify devices on Wi-Fi Create random values 47 / 60What does BLE stand for? Bluetooth Low Energy Bluetooth Light Edition Bluetooth Long-range Extension Basic Low Energy 48 / 60Which function turns an output pin HIGH or LOW in Arduino-style code for ESP32? writePin() digitalWrite() pinOutput() setPin() 49 / 60What is the purpose of setup() in ESP32 Arduino code? Initializes code and runs once Runs the main loop repeatedly Delays execution Sets up the display 50 / 60Which IDE is most commonly used by beginners for ESP32 development? Code::Blocks Arduino IDE Eclipse VS Code 51 / 60What tool is used for professional development with ESP32 (official SDK)? Arduino Core ESP-Terminal PlatformIO Core ESP-IDF 52 / 60Which function initializes the serial communication? Serial.read() Serial.init() Serial.begin() Serial.start() 53 / 60Which app is commonly used to test BLE communication on a smartphone? ESP BLE Controller Arduino Bluetooth Serial Monitor nRF Connect 54 / 60What does the loop() function do? Uploads code Repeats code continuously Declares variables Executes only once 55 / 60What peripheral is used to convert analog input to digital values? ADC PWM SPI DAC 56 / 60What data type is commonly used to store HIGH or LOW? int bool byte boolean 57 / 60Which platform is used to manage ESP32 code with a modern interface and multiple boards? Tinkercad PlatformIO GitHub Notepad++ 58 / 60What must be installed in Arduino IDE to program the ESP32? ESP32 Board Support Package Python interpreter Java SDK Bluetooth driver 59 / 60How many ADC channels are available on the ESP32? 3 10 to 18(depends on chip variant) 32 2 60 / 60What constant indicates a successful connection in WiFi.status()? ONLINE WL_CONNECTED CONNECTED OK Your score isThe average score is 80% 0% Restart quiz
