Programmably connect to a WiFi network using a password

Connecting to a wireless network using a password is harder than what you might think, as you need to create a WiFi ‘profile’.

The below PowerShell code can do exactly what you need, it creates the WiFi profile, and connects you to the WiFi network automatically. 

# Fill in mandatory details for the WiFi network
$WirelessNetworkSSID = '<WiFi_SSID>'
$WirelessNetworkPassword = '<WiFi_password>'
$Authentication = 'WPA2PSK' # Could be WPA2
$Encryption = 'AES'
# Create the WiFi profile, set the profile to auto connect
$WirelessProfile = @'
<WLANProfile xmlns="http://www.microsoft.com/networking/WLAN/profile/v1"&gt;
<name>{0}</name>
<SSIDConfig>
<SSID>
<name>{0}</name>
</SSID>
</SSIDConfig>
<connectionType>ESS</connectionType>
<connectionMode>auto</connectionMode>
<MSM>
<security>
<authEncryption>
<authentication>{2}</authentication>
<encryption>{3}</encryption>
<useOneX>false</useOneX>
</authEncryption>
<sharedKey>
<keyType>passPhrase</keyType>
<protected>false</protected>
<keyMaterial>{1}</keyMaterial>
</sharedKey>
</security>
</MSM>
</WLANProfile>
'@ -f $WirelessNetworkSSID, $WirelessNetworkPassword, $Authentication, $Encryption
# Create the XML file locally
$random = Get-Random Minimum 1111 Maximum 99999999
$tempProfileXML = "$env:TEMP\tempProfile$random.xml"
$WirelessProfile | Out-File $tempProfileXML
# Add the WiFi profile and connect
Start-Process netsh ('wlan add profile filename={0}' -f $tempProfileXML)
# Connect to the WiFi network – only if you need to
Start-Process netsh ('wlan connect name="{0}"' -f $WirelessNetworkSSID)

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