IoT

The need to store data in the cloud is a fundamental pillar of Internet of Things (IoT) projects. Whether for logging sensor readings, monitoring a device’s state, or creating event logs, having an accessible and scalable database is essential. The ESP32, in its various versions, combined with Google’s Firebase Firestore, forms a powerful and accessible duo for developers and hobbyists alike. In this technical tutorial, we will explore the most lightweight and universal method for sending data from an ESP32 to Firestore: using the native REST API. Instead of relying on heavy Firebase libraries, we will build HTTP requests from scratch. This approach not only saves precious memory and resources on the microcontroller but also deepens the understanding of how web APIs work. ...

For those who develop projects with graphical interfaces, the complexity of integrating displays, touch controllers, and microcontrollers can be a major challenge. The WT32-SC01 Plus board emerges as an interesting alternative to simplify this process. This is a development board that integrates the ESP32-S3 processor with a 3.5-inch capacitive touch screen. This “all-in-one” approach is ideal for prototyping and developing user interfaces (UI), such as automation control panels, small interactive consoles, and other devices that require visual interaction with the user. ...