Wi-Fi
Wi-Fi® allows devices to connect to a local area network wirelessly. Based on IEEE® 802.11 standards, Wi-Fi is commonly used for providing internet access and enabling communication between devices without the need for physical cables.
Use Wi-Fi shields as an add-on to your Arduino® board to expand its Wi-Fi capabilities. These shields enable the boards to connect to wireless networks, allowing them to send and receive data over the internet or a local network.
Blocks
| WiFi TCP/IP Receive | Receive data over TCP/IP network from remote host on wireless network |
| WiFi TCP/IP Send | Send data over TCP/IP network to remote host over wireless network |
| WiFi UDP Receive | Receive data from UDP host on wireless network |
| WiFi UDP Send | Send data to UDP host on wireless network |
| WiFi ThingSpeak Read | Read data stored in a ThingSpeak channel on wireless network |
| WiFi ThingSpeak Write | Publish data to Internet of Things using ThingSpeak on wireless network |
| WebSocket Subscribe | Subscribe to the JSON data received by a WebSocket server |
| WebSocket Publish | Publish data to WebSocket server in JSON format |
| WiFi MQTT Publish | Publish messages to message queuing telemetry transport (MQTT) broker (Since R2022b) |
| WiFi MQTT Subscribe | Receive messages from message queuing telemetry transport (MQTT) broker (Since R2022b) |
| WiFi HTTP Client | Send and receive data from HTTP server over URL connection (Since R2023a) |
Model Settings
Topics
- Connect ESP8266 to Arduino Hardware
Pin mapping to connect ESP8266 to an Arduino board.
- Connect Arduino WiFi Shield to Arduino Hardware
Follow the steps to connect Arduino Wi-Fi Shield to an Arduino board.
- Connect Arduino MKR1000, Arduino MKR WIFI 1010, or Arduino MKR ZERO Hardware to Computer
Follow the steps to connect Arduino MKR1000, Arduino MKR WIFI 1010, or Arduino MKR ZERO hardware to a computer.
- Set Up a Wi-Fi TCP/IP Connection with Connected IO in Simulink
Establish a Wi-Fi TCP/IP connection and simulate model in the connected IO mode.
- Set Up a Wi-Fi UDP Connection with Connected IO in Simulink
Establish a Wi-Fi UDP connection and simulate model in connected IO mode.
- Configure Network Settings for Wi-Fi
Follow the steps to configure the Wi-Fi settings for an Arduino board.
- Configure Model to Run in External Mode over Wi-Fi or Serial
Simulate model in external mode using Wi-Fi or serial communication.
- Publish MQTT Messages and Subscribe to Message Topics
Basics of the MQTT messaging protocol.
- Generate SSL/TLS Credentials for MQTT Broker Using OpenSSL
Learn how to create SSL/TLS credentials (server key and certificate, and client certificate) with OpenSSL commands to enable secure communication between Arduino and ThingSpeak™ or Mosquitto™ brokers.
Troubleshooting
Unable to Deploy Code on an Arduino Board Connected to an ESP8266
No separate serial port is available on Arduino Uno board to deploy code.
Unable to Connect ESP8266 to Wi-Fi Network
Connection between ESP8266 and Wi-Fi network failed.
Unable to Assign IP Address to an Arduino Board Connected to ESP8266
Failed to assign IP address to Arduino board connected to ESP8266.
Unable to Assign IP Address to an Arduino MKR1000 Board
Failed to assign IP address to Arduino MKR WIFI 1010 board.
Unable to Assign IP Address to an Arduino MKR WIFI 1010 Board
Failed to assign IP address to Arduino MKR WIFI 1010 board.
Unable to Assign IP Address to an Arduino Board Connected to WiFi Shield
Failed to assign IP address to Arduino board connected to WiFi shield.
Expected Data Not Received on WiFi TCP or UDP Receive Block
Data received on the WiFi TCP Receive block or WiFi UDP Receive block is incorrect.
WiFi TCP/IP Send or Receive Server Block Is Unable to Communicate to TCP/IP Client
In server mode, the WiFi TCP/IP block is unable to communicate with TCP/IP client.
WiFi TCP/IP Send or Receive Client Block Is Unable to Communicate to TCP/IP Server
In client mode, the WiFi TCP/IP block is unable to communicate with TCP/IP server.
WiFi ThingSpeak Write Block Unable to Upload Data to a ThingSpeak Channel
Data is not uploaded on ThingSpeak channel.
Featured Examples
Get Started with Wi-Fi on Arduino Hardware
Use Simulink® Support Package for Arduino® hardware to receive and send TCP/IP or UDP messages over Wi-Fi® using Arduino boards.
Publish and Subscribe to Messages on ThingSpeak Using MQTT Blocks on Arduino
Use the WiFi MQTT Publish and WiFi MQTT Subscribe blocks from the Simulink® Support Package for Arduino® Hardware to publish to and receive messages from MQTT broker to Arduino board. In this example, ThingSpeak™ is the MQTT broker and Arduino board is the MQTT client.
Arduino Based Smart Watering of Plants
Use Simulink® Support Package for Arduino® Hardware to create a Simulink model to implement a smart plant watering system based on ThingSpeak™.
Warn Dry Soil Moisture with Notification from IFTTT Using Arduino Based Smart Watering System
Use the WiFi HTTP Client block from the Simulink® Support Package for Arduino® Hardware to trigger a request to IFTTT once the moisture in the soil drops below a set threshold value and send a notification to an Android device.
Read and Write to ThingSpeak Channel Using Arduino WiFi HTTP Client Block
Use the WiFi HTTP Client block from the Simulink® Support Package for Arduino® Hardware to read and write data to a field in a ThingSpeak™ channel.
Publish Data from Arduino Blocks and Read Data on Web Browser Using WebSocket Protocols
Use the Simulink® Support Package for Arduino® Hardware to publish and subscribe data from various Arduino blocks to a WebSocket server and to read data on a web browser in a WebSocket client.
Control Brightness of Arduino Onboard LED from Android Device
Use the Simulink® Support Package for Arduino® Hardware to control brightness of a LED on an Arduino board using an Android® device.
Develop Gyroscope-Based Pedometer Using Arduino
How MATLAB® Function blocks are used in Simulink® models to implement algorithms using MATLAB functions. An Arduino® MKR1000 board is used to count the number of steps a person takes while walking. The pedometer is attached to the thigh of the person in such a way that the x-axis of the gyroscope is perpendicular to the direction of walking. The data from a gyroscope sensor is sent to an Android device using the User Datagram Protocol (UDP).
Raspberry Pi's Pan Tilt HAT Control Using Arduino MKR WiFi 1010 and LIS3DH Interface
Configure use the example Simulink® model interfacing a Raspberry Pi® hardware with a Pan Tilt HAT control. The model receives information from an Arduino WiFi MKR 1010 connected to a LIS3DH accelerometer sensor. The Pan tilt HAT orientation is controlled based on the received data from the Arduino®.
Securely Publish and Subscribe to Messages on Mosquitto Broker Using Arduino Hardware
Learn how to securely exchange messages between Arduino and a Mosquitto broker using MQTT blocks in Simulink®.
