Si quieres ver el documento en español, por favor consulta el archivo README_es.md

My natural language is Spanish. All texts have been translated with Google Translator.

m77-raspberry-wifi-node

It is a module that I have developed in node.js to configure a Raspberry Pi Wifi network that uses wpa_cli from wpa_supplicant.

---

Implementation of this module is now available to create a fully featured API for node.js with express.

You can find it at api-m77-raspberry-wifi-node

---

Why do I do it?

Because I have benefited a lot from the work of other people and organizations that offer development modules and I want to give something back to the community.

I have dedicated several hours to try to give the necessary functionalities for a correct development of applications in node.js.

I hope you find it very useful and recommend it so that it reaches more developers :-)

Install

npm install m77-raspberry-wifi-node

Use

In order to initialize the module, it must first be imported, instantiated and initialized (in an asynchronous function) with the desired configuration

const M77RaspberryWIFI = require('m77-raspberry-wifi-node')
const wifi = new M77RaspberryWIFI()

async function start() {
    const init = await wifi.init()
}
start()

Methods

*** Important note: All methods are asynchronous

listInterfaces()

Auxiliary method to know which are the Wi-Fi interfaces of the system

const interfaces = await wifi.listInterfaces()
console.log(interfaces)

Response:

{
  success: true,
  msg: 'Wi-Fi interfaces found on the system',
  data: [ 'wlan0_ap', 'wlan0' ]
}

Error:

{ success: false, msg: `There are no Wi-Fi interfaces in the system.`, data: [] }

init(options)

Initialize the interface and options to be able to use the other methods options:

• device - The interface to use - default wlan0
• debugLevel - The debug level displayed on the console (0 - Nothing, 1 - Basic, 2 - Full) - Default 2
• scan_timeout - Maximum waiting time in milliseconds to scan Wi-Fi networks - Default 15000
• connect_timeout - Maximum waiting time in milliseconds to scan Wi-Fi networks - Default 45000

const init = await wifi.init({ device: "wlan0", debugLevel: 0 })
console.log(init)

Response:

{ success: true, msg: 'Interface wlan0 has been found on the system' }

Error:

{ success: false, msg: `The wlan0 interface does not exist. Please execute the listInterfaces() method to get the list of available Wifi interfaces and set in init() method.` }

status()

Show the connection status on the interface

const status = await wifi.status()
console.log(status)

Response: *** No connection established***

{
  success: true,
  msg: 'Got interface status wlan0',
  data: {
    wpa_state: 'DISCONNECTED',
    p2p_device_address: 'da:3a:e8:35:d0:b7',
    address: 'da:3a:e8:35:d0:b7',
    uuid: 'aefc91bf-693f-57b0-3542-eeb8bc7e495a',
    connected: false
  }
}

*** With connection established***

{
  success: true,
  msg: 'Got interface status wlan0',
  data: {
    bssid: '48:45:4e:8f:4b:e7',
    freq: 5240,
    ssid: 'mangos77',
    id: 0,
    mode: 'station',
    pairwise_cipher: 'CCMP',
    group_cipher: 'CCMP',
    key_mgmt: 'WPA2-PSK',
    wpa_state: 'COMPLETED',
    ip_address: '192.168.68.60',
    p2p_device_address: 'da:3a:e8:35:d0:b7',
    address: 'da:3a:e8:35:d0:b7',
    uuid: 'aefc91bf-693f-57b0-3542-eeb8bc7e495a',
    ieee80211ac: '1',
    connected: true,
    typeGHz: '5',
    signallevel: -34,
    signalStrength: 4
  }
}

hasConnection()

Simple status() response showing whether or not the device is connected to a Wifi network

const hasConnection = await wifi.hasConnection()
console.log(hasConnection)

Response: Connected

{
  success: true,
  msg: 'Does interface wlan0 have a connection?',
  data: {
    has_connection: true,
    ssid: 'mangos77',
    ip_address: '192.168.1.60'
  }
}

Not connected

{
  success: true,
  msg: 'Does interface wlan0 have a connection?',
  data: { has_connection: false, ssid: '', ip_address: '' }
}

savedNetworks()

Delivers a list of all the Wifi networks saved in the interface to which it can be connected

const saved = await wifi.savedNetworks()
console.log(saved)

Response:

{
  success: true,
  msg: 'List of saved Wi-Fi networks',
  data: [
    {
      networkid: '0',
      ssid: 'mangos77',
      bssid: 'any',
      flags: '[CURRENT]'
    },
    ...
    ...
  ]
}

removeAllNetworks()

Delete all saved Wi-Fi networks. If there is any established connection, it will close it.

const removeAllNetworks = await wifi.removeAllNetworks()
console.log(removeAllNetworks)

Response:

{
  success: true,
  msg: 'Removed all Wifi network configurations for interface wlan0'
}

scan()

Delivers the result of all available Wi-Fi networks to connect ordered by signal strength.

Data is added in the response on each of the detected networks:

• typeGHz - (2.4, 5, etc.)
• signalStrength - [1 (strong) - 5 (weak)]

const scan = await wifi.scan()
console.log(scan)

Response:

{
  success: true,
  msg: 'List of scanned Wi-Fi networks was obtained',
  data: [
    {
      "bssid": "48:22:34:7d:4c:c7",
      "frequency": 5240,
      "signallevel": -33,
      "flags": "[WPA2-PSK+FT/PSK-CCMP][WPS][ESS]",
      "open": false,
      "ssid": "mangos77",
      "typeGHz": "5",
      "signalStrength": 1,
      "current": true
    },
    ...
    ...
    {
      "bssid": "0e:96:e6:43:44:e4",
      "frequency": 2412,
      "signallevel": -88,
      "flags": "[ESS]",
      "open": true,
      "ssid": "My Open Net",
      "typeGHz": "5",
      "signalStrength": 2,
      "current": false
    }
  ]
}

scanUniques()

Shows list of all available networks not hidden and without duplicates of ssid and frequency.

const availableUniques = await wifi.scanUniques()
console.log(availableUniques)

Response:

{
  success: true,
  msg: 'Got a list of unique and not hidden Wi-Fi networks',
  data: [
    {
      bssid: '48:54:5b:9e:4a:c7',
      frequency: 5240,
      signallevel: -39,
      flags: '[WPA2-PSK+FT/PSK-CCMP][WPS][ESS]',
      open: false,
      ssid: 'mangos77',
      typeGHz: '5',
      signalStrength: 4,
      current: true
    },
    ...
    {
      bssid: '4e:23:b4:9e:4a:c6',
      frequency: 2417,
      signallevel: -27,
      flags: '[WPA2-PSK+FT/PSK-CCMP][ESS]',
      open: false,
      ssid: 'mangos77',
      typeGHz: '2.4',
      signalStrength: 4,
      current: false
    }
  ]
}

scanInTypes()

Returns the available Wi-Fi networks grouped by type 2.4, 5, etc.. They are delivered ordered in each block by the strength of the signal

Data is added in the response on each of the detected networks:

• typeGHz - (2.4, 5, etc.)
• signalStrength - [1 (strong) - 5 (weak)]
• current - [true | false] depending on whether it is the network you are connected to

const inTypes = await wifi.scanInTypes()
console.log(inTypes)

Response:

{
  "success": true,
  "msg": "A list grouped by type of the scanned Wi-Fi networks was obtained",
  "data": {
    "wifi_24": [
      {
        "bssid": "48:26:14:8d:4c:d8",
        "frequency": 2417,
        "signallevel": -26,
        "flags": "[WPA2-PSK+FT/PSK-CCMP][WPS][ESS]",
        "open": false,
        "ssid": "mangos77",
        "typeGHz": "2.4",
        "signalStrength": 1,
        "current": false
      },
      ...
    ],
    "wifi_5": [
      {
        "bssid": "48:22:78:8e:6a:bf",
        "frequency": 5240,
        "signallevel": -87,
        "flags": "[WPA2-PSK+FT/PSK-CCMP][WPS][ESS]",
        "open": false,
        "ssid": "mangos77",
        "typeGHz": "5",
        "signalStrength": 2,
        "current": true
      },
      ...    
    ]
  }
}

connect(config)

Method that tries to establish a connection with a Wi-Fi network, this can be secure, hidden, open networks or combinations. If the connection could not be made, it tries to connect to any of the Wi-Fi networks saved in the system that are available. **This action can take a long time per connection attempt, the maximum timeout for each connection attempt is defined in init() with the connect_timeout configuration parameter **

config:

• ssid - Name of the Wi-Fi network to connect to
• psk - Wifi network password - Leave empty in case of open network
• removeAllNetworks - [true | false] If you want to delete all saved networks - Default false
• hidden - [true | false] To indicate whether or not it is a hidden network - By default false
• bssid - Use the bssid in case you want to fix the connection, or in the case that the ssid uses two bands and you need to connect to a specific band - By default '' (does not bind the connection to the bssid)

const connect = await wifi.connect({ ssid: "mangos77_other", psk: "sd343dsdsss"})
console.log(connect)

Response: Connection could be established

{
  success: true,
  msg: 'The Wi-Fi network has been successfully configured on interface wlan0',
  data: {
    milliseconds: 24851,
    connected_to: { milliseconds: 24851, ssid: 'mangos77_other' }
  }
}

Could not establish connection

{
  success: false,
  msg: 'Could not connect to SSID "mangos77_other" on interface wlan0. The interface wlan0 has been reconnected to ssid "mangos77" in 6315 milliseconds',
  data: {
    milliseconds: 59481,
    connected_to: { milliseconds: 6315, ssid: 'mangos77' }
  }
}

disconnect()

Method to disconnect the current Wifi from the interface

const disconnect = await wifi.disconnect()
console.log(disconnect)

Response:

{ success: true, msg: 'Interface wlan0 has been disconnected' }

reconnect()

Try to re-connect to a network saved in the system

const reconnect = await wifi.reconnect()
console.log(reconnect)

Response:

{
  success: true,
  msg: 'The interface wlan0 has been reconnected to ssid "mangos77" in 13487 milliseconds',
  data: { milliseconds: 13487, ssid: 'mangos77' }
}

Error:

{ success: false, msg: 'Failed to reconnect interface wlan0' }

I hope you find it useful, if you find any point of improvement or comment, please do so :-)