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