This firmware provides access to the proprietary RF protocol which I'm using for my homebrew smart home applications. The protocol is based on the Enhanced Shockburst (ESB) protocol by Nordic Semiconductor. The esb-bridge firmware allows a host PC to interact with the ESB-based devices.
The firmware implements a virtual com port with a simple binary command protocol. ESB data can be sent to any Pipeline address in atomic send-reply transactions (called transfer). Also, a listener address can be set so the device can act as a "central" device (similar to BLE) and send a USB packet to the host on incoming ESB messages
The firmware is targeted for the NRF52840 chip and was tested on a Particle Xenon board.
To make use of an ESB bridge device, use the Go package at which contains (among a bunch of other stuff) a package for talking to ESB devices using the bridge, as well as a package for using the raw USB protocol
This is work in progress and not considered functional, as long as this notice exists
Just clone the project and run make. A gcc-arm-none-eabi toolchain is needed (arm-none-eabi-gcc is expected in PATH). Also the Nordic NRF5 SDK is required,the path can be adjusted with the parameter SDK_ROOT in the Makefile
Clone the project and build the Docker image containing the toolchain:
$ docker build -t arm-gcc:latest .The image contains the gcc-arm-none-eabi toolchain and the Nordic SDK
$ docker run --rm -v $(pwd):/workspace arm-gcc make- ESB connection parameters are fixed to suit my application
- The ESB implemention of the Nordic NRF5 SDK for the integrated radio is used and is therefore not suitable for the standalone NRF24L01 devices
- Listening for incoming ESB messages only works if a USB connection is opened
If not mentioned otherwise in individual source files, the MIT license (see LICENSE file) is applicable