SMS (text) from the Pi

Important Notes:

• You need to enable SMTP access on your email account (Gmail might require an App Password). See below

• You need to know the recipient’s carrier (to use the correct SMS gateway in LINE 7 of the code). Here's a brief overview of some common carriers and their SMS gateways:

• AT&T: [number]@txt.att.net​

• T-Mobile: [number]@tmomail.net​

• Verizon: [number]@vtext.com​

• Sprint: [number]@messaging.sprintpcs.com

You need an App Password, not your Gmail password.

Step 1: Turn on 2-Step Verification (if not already)

1. Go to https://myaccount.google.com/security 

2. Under "Signing in to Google", enable 2-Step Verification

Step 2: Generate an App Password

1. Go to: https://myaccount.google.com/apppasswords 

2. Select "Mail" as the app

3. Select "Other" as the device, and name it (e.g., "Raspberry Pi SMS")

4. Click Generate

5. Copy the 16-character password Google gives you

Step 3: Replace in Your Line 12 Code

Instead of: server.login("your_email@gmail.com", "your_gmail_password")

Use: server.login("your_email@gmail.com", "your_16_character_app_password")

That should let the email go through and send the SMS using the carrier gateway.