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