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