Wake up on time using Google Maps traffic, Twilio SMS, and iOS Shortcuts

📖 Overview

This workflow automates your morning wake-up call by calculating the perfect time to leave based on real-time traffic. Instead of a static alarm, n8n continuously monitors road conditions via the Google Maps Distance Matrix API. When the "strike time" is reached, accounting for both live traffic and your morning preparation; the workflow triggers a physical alarm on your iPhone via a Twilio SMS and iOS Shortcuts.

🛠️ System components

1. The Brain (n8n)

Check interval: Monitors traffic every minute during your "ready window."

Logic: Uses a mathematical expression to determine if you need to wake up now to make your arrival goal.

**Formula:

T_{wake} = T_{arrival} - (T_{traffic} + T_{prep})

2. The Log (Google Sheets): Maintains a diagnostic history when an sms is sent to your phone for each day.

3. The Trigger (iPhone): Utilizes an iOS Shortcut Automation that listens for a specific SMS phrase ("Wake up!") to trigger a physical alarm.

⚙️ Setup instructions

Step 1: Google Cloud Platform

Enable the Distance Matrix API in your Google Cloud Console.

Generate an API Key and restrict it to your IP if possible.

Step 2: Twilio configuration

Gather your Account SID and Auth Token.

Ensure your personal mobile number is verified in the Twilio console to receive messages.

Step 3: iOS Shortcut automation

• Open the Shortcuts App → Automation → New Automation.

• Select Message → Message Contains: Wake up! →

• Action: Add "Start Timer" or "Create Alarm."

Important: Disable "Ask Before Running" and "Notify When Run."

💡 Node breakdown & logic

Arrival Schedule (Cron): Defines the window when the workflow should be active (e.g., 7:00 AM – 8:00 AM).

Traffic Monitor (Google Maps): Fetches the duration_in_traffic value.

Wake-up Evaluator (Filter): Compares if Current Time + Traffic + 20 mins >= Arrival Time.

SMS Dispatcher (Twilio): Sends the trigger phrase to your device.

Activity Logger (Google Sheets): Records the 1st execution of the day and then, with the use of the google sheet and the IF loop, the workflow will stop sending sms after the first send.