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