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To send an SMS message that includes Greek characters, you can use PowerShell along with an SMS gateway service that supports Unicode messages.
Here is an example PowerShell script that uses the Twilio SMS gateway service to send a Unicode message that includes Greek characters:
# Twilio API credentials
$AccountSid = "YOUR_ACCOUNT_SID"
$AuthToken = "YOUR_AUTH_TOKEN"
$FromPhone = "YOUR_TWILIO_PHONE_NUMBER"
$ToPhone = "RECIPIENT_PHONE_NUMBER"
# Message content
$Message = "Γεια σας, κόσμε!"
# Prepare the SMS message with Unicode encoding
$Encoding = [System.Text.Encoding]::UTF8
$Bytes = $Encoding.GetBytes($Message)
$EncodedMessage = [System.Convert]::ToBase64String($Bytes)
$PostData = "To=$(Uri.EscapeDataString($ToPhone))&From=$(Uri.EscapeDataString($FromPhone))&Body=$(Uri.EscapeDataString($EncodedMessage))&Encoding=UTF-8"
# Send the SMS message using the Twilio REST API
$Uri = "https://api.twilio.com/2010-04-01/Accounts/$AccountSid/Messages.json"
$WebClient = New-Object System.Net.WebClient
$WebClient.Headers.Add("Authorization", "Basic " + [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes("$AccountSid:$AuthToken")))
$WebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded")
$Response = $WebClient.UploadString($Uri, $PostData)
# Output the response from the Twilio API
$Response
In this script, replace the YOUR_ACCOUNT_SID, YOUR_AUTH_TOKEN, YOUR_TWILIO_PHONE_NUMBER, and RECIPIENT_PHONE_NUMBER placeholders with your actual Twilio API credentials and phone numbers.
The $Message variable contains the Greek message you want to send. The script uses the UTF8 encoding to convert the message into bytes and then base64-encodes the bytes to create the final message content that can be sent as a Unicode message.
Lastly, the script uses the UploadString method of the System.Net.WebClient class to make a POST request to the Twilio REST API with the message details. The response from the API is output to the console.