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