So, we are going to start with a very simple example that will start the Bluetooth on our ESP32 and make it discoverable for other Bluetooth devices. Although it gives us much more control over the functionalities, it is also more complex to use and it needs some knowledge about the Bluetooth stack. Note that the BTstack exposes a very low level API. Nonetheless, using it is not so easy as the Arduino core. Setting up IDF is relatively straightforward since the guide is very comprehensive and most of the tools are already compiled for us. If you don’t have IDF configured, please follow Espressif’s guide here. We will be using the ESP32 IDF in order to use the BTstack library. You can check at the GitHub page the setup guide for the ESP32, although we are also going to cover it on this tutorial. Fortunately, the ESP32 is one of the supported microcontrollers. This library has ports for many platforms, as can be seen here. You can also read more about this library on its website. BTstack supports both Bluetooth Classic and Bluetooth Low Energy, making it a versatile choice to use. We are going to use the BlueKitchen’s BTstack library, which can be obtained from GitHub here. The objective of this ESP32 tutorial is to explain how to get started with the Bluetooth functionalities that are supported by the ESP32 hardware. The Bluetooth tests of this tutorial were performed using a DFRobot’s ESP-WROOM-32 module, integrated in a ESP32 FireBeetle board. ![]()
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