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