IoT, ESP32, Arduino

Which of the following is part of Internet of Things (IoT) system?

• Node

• Gateway

• Data Communication

• Data Visualization

Which of the following the most common protocol used by Internet of Things (IoT) devices

• MQTT

• HTTP

• FTP

• SMTP

ESP32 is a microcontroller that has built in network interface. Which of the following are as stated?

• WiFi

• Bluetooth

• LoRa

• GSM

What is the function of JSON?

• To send data that consist multiple value.

• To be friend with Jason Statham.

• To fasten the process of sensor.

• To strengthen the signal of WiFi.

What is the operating voltage for ESP32?

• 24V

• 3.3V

• 1.1V

• 12V

What is the range of analog value for 12 bits ADC?

• 0-1023

• 0-255

• 0-4095

• 0-5000

What is the output value of digital sensor?

• 0 and 1

• 1 and 2

• 0, 1 and 2

• 1, 2 and 3

What delay() used for in programming?

• To slow down the output loop.

• To slow down the signal.

• To wait for your friend.

• To wait for lost tea break.

Which of the following method can control the brightness of LED?

• PWM

• Serial.println()

• delay()

• Serial.begin(115200)

How to start Node-RED services in Windows?

• node-red

• no-red

• not-red

• nodered