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