ESP32 Quiz by azka.xdlabin QuizMarch 3, 2025 ESP32 Quiz 1 / 60Which USB driver is usually required for ESP32 on Windows? CH340 or CP210x USB to UART driver GPIO bridge driver Arduino AVR driver FTDI FT232R 2 / 60Which company manufactures the ESP32 chip? Intel Atmel Microchip Espressif Systems 3 / 60What is the purpose of delay(1000); in ESP32 Arduino code? Reads pin 1000 Turns off power for 1000 ms Waits for user input Waits for 1000 milliseconds 4 / 60Which library is commonly used for Classic Bluetooth in Arduino IDE? BluetoothClassic.h BluetoothSerial.h WiFiSerial.h BLEDevice.h 5 / 60What function is used to disconnect from Wi-Fi in ESP32? WiFi.disconnect() WiFi.end() WiFi.shutdown() WiFi.stop() 6 / 60What does the loop() function do? Uploads code Executes only once Repeats code continuously Declares variables 7 / 60Which platform is used to manage ESP32 code with a modern interface and multiple boards? PlatformIO Tinkercad Notepad++ GitHub 8 / 60Which pins on the ESP32 can be used for touch sensing? Touch-capable GPIOs (e.g., T0 to T9) GPIO 0 to 10 GPIO 32 to 39 Only GPIO 13 9 / 60Which driver is required for the CP2102 chip on Windows systems? CP210x USB to UART Bridge VCP Driver Arduino USB Driver FTDI Driver CH340 Driver 10 / 60What does BLE stand for? Basic Low Energy Bluetooth Light Edition Bluetooth Low Energy Bluetooth Long-range Extension 11 / 60Which company manufactures the ESP32-WROOM-32 module? Espressif Systems Texas Instruments Microchip Atmel 12 / 60How do you get the IP address of ESP32 after connecting to Wi-Fi? WiFi.myIP() WiFi.getIP() WiFi.localIP() WiFi.IP() 13 / 60What is the function to create a Wi-Fi access point? WiFi.apStart() WiFi.apBegin() WiFi.softAP() WiFi.startAP() 14 / 60What types of Bluetooth are supported by ESP32? None Both Classic and BLE BLE only Classic only 15 / 60In BLE, what is the purpose of a "Characteristic"? Stores Wi-Fi credentials Assigns power levels Used to identify the device Transfers data between server and client 16 / 60What is the role of a "BLE Server" on ESP32? It stores data in flash It advertises services and sends data to clients It connects to Wi-Fi networks It connects to other devices and receives data 17 / 60Which app is commonly used to test BLE communication on a smartphone? ESP BLE Controller nRF Connect Arduino Bluetooth Serial Monitor 18 / 60Which communication interfaces does ESP32-WROOM-32 support? SPI, RS485, Ethernet UART, SPI, I2C USB, RS232, VGA UART, HDMI, PCIe 19 / 60What peripheral is used to convert analog input to digital values? ADC DAC SPI PWM 20 / 60Which of the following can ESP32 act as? Neither A nor B Wi-Fi Station Both A and B Wi-Fi Access Point 21 / 60Which library is used to implement BLE on ESP32? ESPBLE.h BluetoothLowEnergy.h BLEDevice.h BLESerial.h 22 / 60What must be installed in Arduino IDE to program the ESP32? ESP32 Board Support Package Bluetooth driver Java SDK Python interpreter 23 / 60What is the purpose of setup() in ESP32 Arduino code? Initializes code and runs once Delays execution Sets up the display Runs the main loop repeatedly 24 / 60What function is used to connect ESP32 to a Wi-Fi network? WiFi.attach() WiFi.connect() WiFi.link() WiFi.begin() 25 / 60What is the function of the CP2102 chip in ESP32 development boards? It manages Wi-Fi connectivity It controls GPIO pins It provides USB-to-Serial communication It converts 5V to 3.3V 26 / 60Which function checks if ESP32 is connected to Wi-Fi? WiFi.signal() WiFi.status() WiFi.check() WiFi.connected() 27 / 60What function is used to set the mode of a GPIO pin in ESP32? setPinMode() gpioMode() definePin() pinMode() 28 / 60What is the maximum voltage ESP32 GPIO pins can tolerate? 5V 1.8V 12V 3.3V 29 / 60How can you install ESP32 board support in Arduino IDE? By downloading an EXE installer Through Tools > Manage Libraries It is built-in automatically Using the Board Manager URL 30 / 60Which library is used in Arduino IDE to connect ESP32 to Wi-Fi? Ethernet.h WiFi.h WiFiClient.h ESP32WiFi.h 31 / 60What is the correct baud rate commonly used for ESP32 serial communication? 115200 250000 9600 4800 32 / 60How many GPIO pins are typically available on the ESP32 DevKit board? 10 34 54 20 33 / 60What tool is used for professional development with ESP32 (official SDK)? ESP-Terminal Arduino Core PlatformIO Core ESP-IDF 34 / 60Which function is used to generate PWM signals on a GPIO pin in Arduino? pwmOut() setPWM() analogWrite() digitalPWM() 35 / 60What is the maximum clock speed of the ESP32-WROOM-32? 120 MHz 240 MHz 80 MHz 160 MHz 36 / 60On Windows, where can you check if the CP2102 driver is installed correctly? Device Manager Task Manager File Explorer Registry Editor 37 / 60Which file is used to configure board settings in Arduino IDE for ESP32? setup.ini platform.ini boards.txt board_config.json 38 / 60What keyword is used to define a constant pin number? pinDef static define const int 39 / 60What constant indicates a successful connection in WiFi.status()? ONLINE OK CONNECTED WL_CONNECTED 40 / 60What is the resolution of the ADC in ESP32 by default? 12-bit 8-bit 16-bit 10-bit 41 / 60Which ESP32 function sets the duty cycle for PWM output? pwmSet(pin, value) digitalWrite(pin, HIGH) setDutyCycle(pin, value) analogWrite(pin, value) 42 / 60Which command reads the value of a digital input pin? readInput() inputRead() getPinValue() digitalRead() 43 / 60What data type is commonly used to store HIGH or LOW? int boolean bool byte 44 / 60What problem can occur if the CP2102 driver is not installed on a computer? The ESP32 will overheat ESP32 will not power on The Wi-Fi module will not work The ESP32 will not be recognized by the computer 45 / 60What is the maximum number of BLE connections ESP32 can typically support as a server? 7 1 3 4 46 / 60Which function turns an output pin HIGH or LOW in Arduino-style code for ESP32? pinOutput() writePin() setPin() digitalWrite() 47 / 60What is the default operating voltage of the ESP32-WROOM-32 module? 3.3V 12V 1.8V 5V 48 / 60How do you print text to the Serial Monitor in ESP32 Arduino code? console.log("text") Serial.println("text") print("text") monitor.write("text") 49 / 60What is the core processor used in ESP32-WROOM-32? RISC-V AVR ARM Cortex-M3 Xtensa LX6 50 / 60What is the typical range of Wi-Fi for ESP32 in open space? 1 km 10–20 meters 50–100 meters 200–300 meters 51 / 60Which IDE is most commonly used by beginners for ESP32 development? Eclipse Code::Blocks VS Code Arduino IDE 52 / 60What UUIDs are used for in BLE communication? Define services and characteristics Identify devices on Wi-Fi Set device frequency Create random values 53 / 60Which pins should be avoided during boot because they affect the boot process? GPIO 18, 19 GPIO 6 to GPIO 11 GPIO 2, 4, 5 GPIO 21, 22 54 / 60How many ADC channels are available on the ESP32? 10 to 18(depends on chip variant) 2 32 3 55 / 60What is the typical range of BLE communication for ESP32? 500 meters 5–10 meters 100–200 meters 10–30 meters 56 / 60What is the purpose of the "Boot" button on ESP32 boards? It resets Wi-Fi settings It opens a menu It enters firmware upload mode It opens the serial monitor 57 / 60What is the default Wi-Fi mode of ESP32 when it powers up? STA mode AP mode AP+STA mode OFF 58 / 60What is the purpose of a DAC in ESP32? Digital signal amplification Convert digital to analog signals Data access control Reset pin values 59 / 60If the ESP32 board is not detected on Linux, which command can help check connected USB devices? Both A and C lsusb usbconfig dmesg | grep serial 60 / 60Which function initializes the serial communication? Serial.init() Serial.start() Serial.begin() Serial.read() Your score isThe average score is 63% 0% Restart quiz
