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