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