Why wireless is needed for IoT in Arduino - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a wireless connection type for IoT.

Arduino

const char* connectionType = "[1]";

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Awireless

Bwired

Cusb

Dethernet

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing wired connection which limits device mobility.

The connection type for IoT devices is usually wireless to allow easy communication without cables.

2fill in blank

medium

Complete the code to initialize a wireless module for IoT communication.

Arduino

WiFi.begin("SSID", "[1]");

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Ausername

Bport

Cipaddress

Dpassword

Attempts:

3 left

💡 Hint

Common Mistakes

Using username instead of password for WiFi connection.

The WiFi.begin function requires the network password to connect wirelessly.

3fill in blank

hard

Fix the error in the code to send data wirelessly using MQTT.

Arduino

client.publish("sensor/data", [1]);

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Adata

BsendData()

C"data"

D123

Attempts:

3 left

💡 Hint

Common Mistakes

Using a function call or string literal instead of the data variable.

The publish function expects a variable or string data to send. Using the variable data is correct.

4fill in blank

hard

Fill both blanks to create a dictionary of sensor readings with wireless transmission condition.

Arduino

if ([1].connected()) {
  client.publish("temp", String([2]));
}

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Aclient

Btemperature

CWiFi

Dhumidity

Attempts:

3 left

💡 Hint

Common Mistakes

Checking WiFi connection instead of MQTT client connection.

Sending humidity instead of temperature.

The client object checks connection before sending, and temperature is the data sent.

5fill in blank

hard

Fill all three blanks to set up wireless credentials and start connection.

Arduino

const char* ssid = "[1]";
const char* password = "[2]";
WiFi.begin([3]);

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AmyNetwork

BmyPassword123

Cssid, password

Dpassword, ssid

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping SSID and password in WiFi.begin.

Using incorrect variable names.

SSID and password are strings, and WiFi.begin needs both as arguments in order.