Bluetooth Low Energy (BLE) is a wireless communication technology designed specifically for Internet of Things (IoT) devices. Compared to traditional Bluetooth, BLE has the following advantages: • Ultra-low power consumption: A button battery can last for several months or even years • Fast connection: Connection establishment takes only a few milliseconds • Low cost: Chip … Read more
Bluetooth Low Energy (BLE) is a wireless communication technology designed for IoT devices. Compared to traditional Bluetooth, BLE has the following advantages: • Ultra-low power consumption: A button battery can last for months or even years • Fast connection: Connection establishment takes only a few milliseconds • Low cost: Low chip prices and low development … Read more
What is it exactly? ESP32-BLE2MQTT is essentially a BLE↔MQTT bridge that directly maps the GATT characteristics of Bluetooth Low Energy (BLE) devices to MQTT topics. • BLE Side: Various sensors, remote controls, lights, door locks… as long as they can broadcast or provide GATT, they can be captured by it. • MQTT Side: Home Assistant, … Read more
The three core protocols in Bluetooth Low Energy (BLE) are GAP, ATT, and GATT. They work together to define how BLE devices are discovered, connected, and communicate. In simple terms: GAP: Responsible for who is where. It handles device visibility, broadcasting, and connection establishment. ATT: Responsible for how to read/write. It defines the underlying mechanisms … Read more
Bluetooth Low Energy (BLE) is a low-power, short-range wireless communication technology introduced with Bluetooth version 4.0. It is now widely used in fields such as the Internet of Things (IoT), smart homes, health monitoring, and wearable devices. Compared to traditional Bluetooth (BR/EDR), BLE significantly reduces power consumption while maintaining a similar communication range, making it … Read more
In Bluetooth Low Energy (BLE) technology, GATT (Generic Attribute Profile) is the core framework that defines how devices transmit data over Bluetooth. It is not only the “syntax” of BLE communication but also the foundation for standardized interactions between devices. Whether it is a smartwatch synchronizing health data, sensors uploading environmental information, or smartphones controlling … Read more
Bluetooth Low Energy (BLE) technology has rapidly become one of the mainstream choices for Internet of Things (IoT) device communication since its introduction, thanks to its low power consumption, low cost, and high flexibility. Within the BLE protocol stack, the Attribute Protocol (ATT) is a crucial foundational protocol that defines how devices discover, read, and … Read more
The BLE protocol stack is mainly divided into three layers: the application layer, the host layer, and the controller layer. Many people are likely familiar with this diagram.The application layer mainly consists of various applications with BLE functionality. The host layer provides various protocols and profiles for BLE communication, while also offering API interfaces for … Read more
Understanding BLE Stack: A Beginner’s Guide Hello everyone! Today, I want to talk to you about the Bluetooth Low Energy (BLE) stack. As an embedded developer, I know that many beginners can be intimidated by the complex architecture of BLE. Don’t worry, I will use the simplest language to help you clarify the ins and … Read more
Overview Low Energy Bluetooth (BLE) is one of the most popular communication protocols for IoT devices. While it shares a name with traditional Bluetooth technology, Bluetooth Classic, BLE is considered a completely different technology, designed for different types of devices. The main difference between Bluetooth Classic and BLE lies in the duty cycle. BLE achieves … Read more