ESP32 Quiz 1 / 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) 2 / 60What function is used to connect ESP32 to a Wi-Fi network? WiFi.link() WiFi.attach() WiFi.begin() WiFi.connect() 3 / 60What is the resolution of the ADC in ESP32 by default? 16-bit 10-bit 8-bit 12-bit 4 / 60What is the default Wi-Fi mode of ESP32 when it powers up? AP mode AP+STA mode OFF STA mode 5 / 60Which function initializes the serial communication? Serial.read() Serial.init() Serial.begin() Serial.start() 6 / 60Which app is commonly used to test BLE communication on a smartphone? nRF Connect Arduino Bluetooth Serial Monitor ESP BLE Controller 7 / 60How many ADC channels are available on the ESP32? 10 to 18(depends on chip variant) 2 32 3 8 / 60What types of Bluetooth are supported by ESP32? BLE only None Both Classic and BLE Classic only 9 / 60If the ESP32 board is not detected on Linux, which command can help check connected USB devices? Both A and C dmesg | grep serial usbconfig lsusb 10 / 60Which company manufactures the ESP32 chip? Intel Atmel Espressif Systems Microchip 11 / 60What function is used to set the mode of a GPIO pin in ESP32? setPinMode() pinMode() definePin() gpioMode() 12 / 60How can you install ESP32 board support in Arduino IDE? By downloading an EXE installer It is built-in automatically Through Tools > Manage Libraries Using the Board Manager URL 13 / 60What keyword is used to define a constant pin number? pinDef static const int define 14 / 60What is the function to create a Wi-Fi access point? WiFi.apStart() WiFi.softAP() WiFi.startAP() WiFi.apBegin() 15 / 60Which platform is used to manage ESP32 code with a modern interface and multiple boards? Tinkercad GitHub PlatformIO Notepad++ 16 / 60In BLE, what is the purpose of a "Characteristic"? Assigns power levels Used to identify the device Stores Wi-Fi credentials Transfers data between server and client 17 / 60What is the purpose of setup() in ESP32 Arduino code? Sets up the display Runs the main loop repeatedly Initializes code and runs once Delays execution 18 / 60Which file is used to configure board settings in Arduino IDE for ESP32? boards.txt board_config.json platform.ini setup.ini 19 / 60Which library is used in Arduino IDE to connect ESP32 to Wi-Fi? WiFi.h ESP32WiFi.h Ethernet.h WiFiClient.h 20 / 60What is the default operating voltage of the ESP32-WROOM-32 module? 5V 3.3V 12V 1.8V 21 / 60Which USB driver is usually required for ESP32 on Windows? CH340 or CP210x USB to UART driver GPIO bridge driver FTDI FT232R Arduino AVR driver 22 / 60What is the typical range of BLE communication for ESP32? 10–30 meters 500 meters 100–200 meters 5–10 meters 23 / 60What constant indicates a successful connection in WiFi.status()? CONNECTED ONLINE OK WL_CONNECTED 24 / 60What is the maximum clock speed of the ESP32-WROOM-32? 240 MHz 160 MHz 80 MHz 120 MHz 25 / 60Which function checks if ESP32 is connected to Wi-Fi? WiFi.status() WiFi.connected() WiFi.check() WiFi.signal() 26 / 60On Windows, where can you check if the CP2102 driver is installed correctly? Device Manager File Explorer Registry Editor Task Manager 27 / 60Which ESP32 function sets the duty cycle for PWM output? pwmSet(pin, value) digitalWrite(pin, HIGH) setDutyCycle(pin, value) analogWrite(pin, value) 28 / 60What is the core processor used in ESP32-WROOM-32? ARM Cortex-M3 RISC-V Xtensa LX6 AVR 29 / 60What is the purpose of the "Boot" button on ESP32 boards? It opens a menu It enters firmware upload mode It resets Wi-Fi settings It opens the serial monitor 30 / 60What problem can occur if the CP2102 driver is not installed on a computer? The ESP32 will overheat The Wi-Fi module will not work ESP32 will not power on The ESP32 will not be recognized by the computer 31 / 60What peripheral is used to convert analog input to digital values? DAC SPI ADC PWM 32 / 60What tool is used for professional development with ESP32 (official SDK)? ESP-Terminal ESP-IDF PlatformIO Core Arduino Core 33 / 60Which pins should be avoided during boot because they affect the boot process? GPIO 6 to GPIO 11 GPIO 2, 4, 5 GPIO 18, 19 GPIO 21, 22 34 / 60What is the purpose of delay(1000); in ESP32 Arduino code? Reads pin 1000 Waits for 1000 milliseconds Turns off power for 1000 ms Waits for user input 35 / 60What does BLE stand for? Basic Low Energy Bluetooth Long-range Extension Bluetooth Light Edition Bluetooth Low Energy 36 / 60How do you print text to the Serial Monitor in ESP32 Arduino code? print("text") console.log("text") monitor.write("text") Serial.println("text") 37 / 60Which library is used to implement BLE on ESP32? BLEDevice.h BluetoothLowEnergy.h ESPBLE.h BLESerial.h 38 / 60Which function turns an output pin HIGH or LOW in Arduino-style code for ESP32? writePin() pinOutput() digitalWrite() setPin() 39 / 60What is the role of a "BLE Server" on ESP32? It stores data in flash It advertises services and sends data to clients It connects to Wi-Fi networks It connects to other devices and receives data 40 / 60Which of the following can ESP32 act as? Wi-Fi Station Neither A nor B Both A and B Wi-Fi Access Point 41 / 60How do you get the IP address of ESP32 after connecting to Wi-Fi? WiFi.localIP() WiFi.IP() WiFi.myIP() WiFi.getIP() 42 / 60What is the maximum voltage ESP32 GPIO pins can tolerate? 5V 1.8V 12V 3.3V 43 / 60Which function is used to generate PWM signals on a GPIO pin in Arduino? setPWM() digitalPWM() analogWrite() pwmOut() 44 / 60Which command reads the value of a digital input pin? readInput() inputRead() digitalRead() getPinValue() 45 / 60Which company manufactures the ESP32-WROOM-32 module? Texas Instruments Espressif Systems Microchip Atmel 46 / 60Which IDE is most commonly used by beginners for ESP32 development? Arduino IDE VS Code Eclipse Code::Blocks 47 / 60What UUIDs are used for in BLE communication? Define services and characteristics Identify devices on Wi-Fi Create random values Set device frequency 48 / 60What is the typical range of Wi-Fi for ESP32 in open space? 10–20 meters 50–100 meters 1 km 200–300 meters 49 / 60What data type is commonly used to store HIGH or LOW? byte bool boolean int 50 / 60Which driver is required for the CP2102 chip on Windows systems? CP210x USB to UART Bridge VCP Driver Arduino USB Driver CH340 Driver FTDI Driver 51 / 60What is the function of the CP2102 chip in ESP32 development boards? It converts 5V to 3.3V It controls GPIO pins It provides USB-to-Serial communication It manages Wi-Fi connectivity 52 / 60What does the loop() function do? Declares variables Repeats code continuously Uploads code Executes only once 53 / 60Which library is commonly used for Classic Bluetooth in Arduino IDE? WiFiSerial.h BLEDevice.h BluetoothClassic.h BluetoothSerial.h 54 / 60How many GPIO pins are typically available on the ESP32 DevKit board? 10 34 20 54 55 / 60What is the maximum number of BLE connections ESP32 can typically support as a server? 4 3 1 7 56 / 60What is the purpose of a DAC in ESP32? Convert digital to analog signals Reset pin values Digital signal amplification Data access control 57 / 60What must be installed in Arduino IDE to program the ESP32? Bluetooth driver ESP32 Board Support Package Java SDK Python interpreter 58 / 60What function is used to disconnect from Wi-Fi in ESP32? WiFi.shutdown() WiFi.disconnect() WiFi.stop() WiFi.end() 59 / 60Which communication interfaces does ESP32-WROOM-32 support? UART, SPI, I2C SPI, RS485, Ethernet USB, RS232, VGA UART, HDMI, PCIe 60 / 60What is the correct baud rate commonly used for ESP32 serial communication? 250000 115200 9600 4800 Your score isThe average score is 72% 0% Restart quiz
