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https://github.com/h2zero/esp-nimble-cpp.git
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70 lines
3.9 KiB
Markdown
70 lines
3.9 KiB
Markdown
[Latest release 
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](https://github.com/h2zero/esp-nimble-cpp/releases/latest/)
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Need help? Have questions or suggestions? Join the [](https://gitter.im/NimBLE-Arduino/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
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<br/>
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# esp-nimble-cpp
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NimBLE CPP library for use with ESP32 that attempts to maintain compatibility with the [nkolban cpp_uitls BLE API](https://github.com/nkolban/esp32-snippets/tree/master/cpp_utils).
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**An Arduino version of this library, including NimBLE, can be [found here.](https://github.com/h2zero/NimBLE-Arduino)**
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This library **significantly** reduces resource usage and improves performance for ESP32 BLE applications as compared
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with the bluedroid based library. The goal is to maintain, as much as reasonable, compatibility with the original
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library but refactored to use the NimBLE stack. In addition, this library will be more actively developed and maintained
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to provide improved capabilites and stability over the original.
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**Testing shows a nearly 50% reduction in flash use and approx. 100kB less ram consumed vs the original!**
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*Your results may vary*
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<br/>
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# What is NimBLE?
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NimBLE is a completely open source Bluetooth Low Energy stack produced by [Apache](https://github.com/apache/mynewt-nimble).
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It is more suited to resource constrained devices than bluedroid and has now been ported to the ESP32 by Espressif.
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<br/>
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# Installation
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### ESP-IDF v4.0+
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Download as .zip and extract or clone into the components folder in your esp-idf project.
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Run menuconfig, go to `Component config->Bluetooth` enable Bluetooth and in `Bluetooth host` NimBLE.
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Configure settings in `NimBLE Options`.
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`#include "NimBLEDevice.h"` in main.cpp.
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Call `NimBLEDevice::init("");` in `app_main`.
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<br/>
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### ESP-IDF v3.2 & v3.3
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The NimBLE component does not come with these versions of IDF (now included in 3.3.2 and above).
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A backport that works in these versions has been created and is [available here](https://github.com/h2zero/esp-nimble-component).
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Download or clone that repo into your project/components folder and run menuconfig.
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Configure settings in `main menu -> NimBLE Options`.
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`#include "NimBLEDevice.h"` in main.cpp.
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Call `NimBLEDevice::init("");` in `app_main`.
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<br/>
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# Using
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This library is intended to be compatible with the original ESP32 BLE functions and types with minor changes.
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If you have not used the original Bluedroid library please refer to the [New user guide](docs/New_user_guide.md).
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If you are familiar with the original library, see: [The migration guide](docs/Migration_guide.md) for details about breaking changes and migration.
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Also see [Improvements_and_updates](docs/Improvements_and_updates.md) for information about non-breaking changes.
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[Full API documentation and class list can be found here.](https://h2zero.github.io/esp-nimble-cpp/)
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<br/>
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## Using with Arduino as an IDF component and CMake
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When using this library along with Arduino and compiling with *CMake* you must add `add_compile_definitions(ARDUINO_ARCH_ESP32=1)`
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in your project/CMakeLists.txt after the line `include($ENV{IDF_PATH}/tools/cmake/project.cmake)` to prevent Arduino from releasing BLE memory.
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<br>
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# Acknowledgments
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* [nkolban](https://github.com/nkolban) and [chegewara](https://github.com/chegewara) for the [original esp32 BLE library](https://github.com/nkolban/esp32-snippets/tree/master/cpp_utils) this project was derived from.
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* [beegee-tokyo](https://github.com/beegee-tokyo) for contributing your time to test/debug and contributing the beacon examples.
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* [Jeroen88](https://github.com/Jeroen88) for the amazing help debugging and improving the client code.
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<br/>
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