Send SMS with the ESP32 (Twilio) | tecno4 | Scoop.it
This guide shows how to send SMS with the ESP32 using an online service called Twilio. With this service, you can send SMS with the ESP32 without needing a GSM module or a dedicated physical SIM card. Using Twilio is not free but you can sign up for a free trial for testing purposes. We’ll use a free trial account throughout the tutorial.