ESP32 Quiz by azka.xdlabin QuizMarch 3, 2025 ESP32 Quiz 1 / 60What is the core processor used in ESP32-WROOM-32? RISC-V Xtensa LX6 ARM Cortex-M3 AVR 2 / 60Which file is used to configure board settings in Arduino IDE for ESP32? boards.txt setup.ini board_config.json platform.ini 3 / 60What does the loop() function do? Executes only once Uploads code Declares variables Repeats code continuously 4 / 60Which library is commonly used for Classic Bluetooth in Arduino IDE? BLEDevice.h BluetoothSerial.h BluetoothClassic.h WiFiSerial.h 5 / 60What is the maximum voltage ESP32 GPIO pins can tolerate? 12V 1.8V 5V 3.3V 6 / 60On Windows, where can you check if the CP2102 driver is installed correctly? Device Manager Registry Editor File Explorer Task Manager 7 / 60How do you print text to the Serial Monitor in ESP32 Arduino code? Serial.println("text") monitor.write("text") console.log("text") print("text") 8 / 60What is the typical range of BLE communication for ESP32? 5–10 meters 500 meters 10–30 meters 100–200 meters 9 / 60What tool is used for professional development with ESP32 (official SDK)? Arduino Core ESP-IDF ESP-Terminal PlatformIO Core 10 / 60What UUIDs are used for in BLE communication? Set device frequency Create random values Define services and characteristics Identify devices on Wi-Fi 11 / 60In BLE, what is the purpose of a "Characteristic"? Stores Wi-Fi credentials Assigns power levels Used to identify the device Transfers data between server and client 12 / 60Which library is used in Arduino IDE to connect ESP32 to Wi-Fi? ESP32WiFi.h WiFiClient.h WiFi.h Ethernet.h 13 / 60What is the purpose of delay(1000); in ESP32 Arduino code? Waits for 1000 milliseconds Waits for user input Turns off power for 1000 ms Reads pin 1000 14 / 60What is the purpose of a DAC in ESP32? Convert digital to analog signals Data access control Digital signal amplification Reset pin values 15 / 60Which USB driver is usually required for ESP32 on Windows? FTDI FT232R GPIO bridge driver CH340 or CP210x USB to UART driver Arduino AVR driver 16 / 60Which of the following can ESP32 act as? Neither A nor B Wi-Fi Access Point Both A and B Wi-Fi Station 17 / 60What is the maximum clock speed of the ESP32-WROOM-32? 160 MHz 240 MHz 120 MHz 80 MHz 18 / 60Which command reads the value of a digital input pin? getPinValue() digitalRead() inputRead() readInput() 19 / 60What is the maximum number of BLE connections ESP32 can typically support as a server? 3 4 1 7 20 / 60Which company manufactures the ESP32 chip? Atmel Espressif Systems Microchip Intel 21 / 60What peripheral is used to convert analog input to digital values? PWM SPI ADC DAC 22 / 60What must be installed in Arduino IDE to program the ESP32? ESP32 Board Support Package Python interpreter Java SDK Bluetooth driver 23 / 60What is the resolution of the ADC in ESP32 by default? 8-bit 12-bit 16-bit 10-bit 24 / 60What is the function to create a Wi-Fi access point? WiFi.apStart() WiFi.apBegin() WiFi.startAP() WiFi.softAP() 25 / 60What is the default operating voltage of the ESP32-WROOM-32 module? 1.8V 5V 3.3V 12V 26 / 60How many ADC channels are available on the ESP32? 3 2 10 to 18(depends on chip variant) 32 27 / 60Which company manufactures the ESP32-WROOM-32 module? Espressif Systems Microchip Atmel Texas Instruments 28 / 60Which function initializes the serial communication? Serial.init() Serial.begin() Serial.read() Serial.start() 29 / 60Which platform is used to manage ESP32 code with a modern interface and multiple boards? Notepad++ Tinkercad PlatformIO GitHub 30 / 60What is the correct baud rate commonly used for ESP32 serial communication? 4800 115200 9600 250000 31 / 60If the ESP32 board is not detected on Linux, which command can help check connected USB devices? dmesg | grep serial lsusb usbconfig Both A and C 32 / 60Which driver is required for the CP2102 chip on Windows systems? CH340 Driver FTDI Driver Arduino USB Driver CP210x USB to UART Bridge VCP Driver 33 / 60Which function checks if ESP32 is connected to Wi-Fi? WiFi.status() WiFi.connected() WiFi.signal() WiFi.check() 34 / 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 35 / 60What is the role of a "BLE Server" on ESP32? It stores data in flash It connects to Wi-Fi networks It advertises services and sends data to clients It connects to other devices and receives data 36 / 60Which function turns an output pin HIGH or LOW in Arduino-style code for ESP32? digitalWrite() pinOutput() setPin() writePin() 37 / 60Which library is used to implement BLE on ESP32? ESPBLE.h BLESerial.h BLEDevice.h BluetoothLowEnergy.h 38 / 60Which IDE is most commonly used by beginners for ESP32 development? VS Code Eclipse Code::Blocks Arduino IDE 39 / 60What is the typical range of Wi-Fi for ESP32 in open space? 1 km 10–20 meters 50–100 meters 200–300 meters 40 / 60What function is used to disconnect from Wi-Fi in ESP32? WiFi.disconnect() WiFi.stop() WiFi.shutdown() WiFi.end() 41 / 60What is the function of the CP2102 chip in ESP32 development boards? It manages Wi-Fi connectivity It controls GPIO pins It converts 5V to 3.3V It provides USB-to-Serial communication 42 / 60What constant indicates a successful connection in WiFi.status()? CONNECTED WL_CONNECTED OK ONLINE 43 / 60Which function is used to generate PWM signals on a GPIO pin in Arduino? setPWM() analogWrite() digitalPWM() pwmOut() 44 / 60Which pins on the ESP32 can be used for touch sensing? GPIO 32 to 39 Only GPIO 13 Touch-capable GPIOs (e.g., T0 to T9) GPIO 0 to 10 45 / 60What function is used to connect ESP32 to a Wi-Fi network? WiFi.connect() WiFi.begin() WiFi.link() WiFi.attach() 46 / 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 47 / 60What is the default Wi-Fi mode of ESP32 when it powers up? OFF STA mode AP mode AP+STA mode 48 / 60What keyword is used to define a constant pin number? pinDef define static const int 49 / 60What is the purpose of setup() in ESP32 Arduino code? Sets up the display Runs the main loop repeatedly Delays execution Initializes code and runs once 50 / 60What problem can occur if the CP2102 driver is not installed on a computer? The ESP32 will overheat The ESP32 will not be recognized by the computer ESP32 will not power on The Wi-Fi module will not work 51 / 60How many GPIO pins are typically available on the ESP32 DevKit board? 34 54 10 20 52 / 60Which ESP32 function sets the duty cycle for PWM output? analogWrite(pin, value) setDutyCycle(pin, value) pwmSet(pin, value) digitalWrite(pin, HIGH) 53 / 60What data type is commonly used to store HIGH or LOW? byte boolean bool int 54 / 60Which communication interfaces does ESP32-WROOM-32 support? UART, SPI, I2C SPI, RS485, Ethernet UART, HDMI, PCIe USB, RS232, VGA 55 / 60What function is used to set the mode of a GPIO pin in ESP32? setPinMode() gpioMode() definePin() pinMode() 56 / 60Which pins should be avoided during boot because they affect the boot process? GPIO 18, 19 GPIO 2, 4, 5 GPIO 21, 22 GPIO 6 to GPIO 11 57 / 60Which app is commonly used to test BLE communication on a smartphone? nRF Connect ESP BLE Controller Serial Monitor Arduino Bluetooth 58 / 60How do you get the IP address of ESP32 after connecting to Wi-Fi? WiFi.myIP() WiFi.IP() WiFi.localIP() WiFi.getIP() 59 / 60What does BLE stand for? Bluetooth Long-range Extension Bluetooth Low Energy Bluetooth Light Edition Basic Low Energy 60 / 60What types of Bluetooth are supported by ESP32? Both Classic and BLE None BLE only Classic only Your score isThe average score is 66% 0% Restart quiz
