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