mbed-os-example-wifi

WiFi example for mbed OS

Getting started with the WiFi API

This is a quick example of a simple WiFi application using the WiFi and network-socket APIs that is provided as a part of mbed-os.

The program brings up the WiFi and the underlying network interface, and uses it to scans available networks, connects to a network, prints interface and connection details and performs simple HTTP operation.

Supported hardware

• UBLOX Odin board (UBLOX_EVK_ODIN_W2 target when using mbed CLI) with ESP8266-01 module using pins D1 D0
• NUCLEO_F429ZI with ESP8266-01 module using pins D1 D0
• NUCLEO_L476RG with ESP8266-01 module using pins D8 D2
• Other mbed target with ESP2866 module (Board it's connected to shouldn't have other network interface eg. Ethernet)

ESP2866 is a fallback option and will be used if the build is for unsupported platform.

Connecting the ESP2866

ESP module needs to be connected to RX and TX UART pins (+ power and ground) on your target board. That can be achieved using Grove shield or connected directly using jumper wires, please note that not all Arduino form factor boards have UART compatible with the Grove shiled.

For Grove shield TX has to be connected to D1 and RX to D0.

Make sure that UART module you're connecting ESP to is different than the debug UART connected to your USB port.

Getting started

1. Import the example

mbed import mbed-os-example-wifi
cd mbed-os-example-wifi

2. Configure the WiFi credentials

Edit mbed_app.json to include correct SSID and Password:

    "config": {
        "wifi-ssid": {
            "help": "WiFi SSID",
            "value": "\"SSID\""
        },
        "wifi-password": {
            "help": "WiFi Password",
            "value": "\"Password\""
        }
    },

3. Compile and generate binary

For example, for GCC:

mbed compile -t GCC_ARM -m UBLOX_EVK_ODIN_W2

Documentation

More information on the network-socket API can be found in the mbed handbook.