blessed is a open source implementation of a Bluetooth Low Energy stack targeting embedded bare-metal devices.

blessed in an acronym for Bluetooth Low Energy Software Stack for Embedded Devices.

In addition to software licensing, proprietary stacks always create a abstractions, and restricts the access to the platform internals. blessed aims to provide a flexible and customizable software stack, and when necessary, allowing access to low layers (Radio and Link Layer).

blessed currently supports GAP Broadcaster role. More features and roles are on the roadmap.

Currently, only nRF51822 platform is supported. Support for Ubertooth One and other platforms are on the roadmap.

Check platform/nrf51822/README.md for specific instructions for the nRF51822 port.

To build blessed, just:

$ make PLATFORM=my-platform

This will generate a static library libblessed.a in the build directory. The public headers are located in include/blessed.

If you always build to the same platform, you can:

$ echo "PLATFORM=my-platform" > Makefile.config
$ make

The Makefile.config file is included by Makefile.

You can configure your build by passing configuration variables in the make command:

$ make MY-CONFIG=my-config-value

The configuration variables are:

• CONFIG_LOG_ENABLE: enable/disable log and error messages
  • =1 enable (default value)
  • =0 disable

There are several examples in examples directory showing how to use blessed. Check examples/README.md to learn how to build and install them.