Sending Group Notifications with Google Sheets and Node-RED

A Node-RED flow programmatically sends out notifications to a list of contacts using Google Sheets and the Vonage SMS API. The flow starts by reading data from a Google Sheet, splitting it into individual arrays, setting a delay between each array, preparing a templated message, sending SMS notifications through the Vonage SMS API, and logging delivery receipts back to the same spreadsheet on a different worksheet.