LightwaveRF library for the Raspberry Pi written in Go.
See my C library for the Raspberry Pi from which this is based.
- Connect the data pin (to the default) Broadcom pin 22. This is GPIO pin 15 on the Pi.
- Connect the VCC to the Pi's 3.3V and GND to the Pi's GND.
- For best performance add an antenna to your TX module. This can just be a quarter-wavelength wire soldered to the module. 433 MHz quarter wavelength is 173 mm but I found best performance with my module using a length of 165 mm.
- pigpio: This is required to control the GPIO pins on the Raspberry Pi
go get github.com/jimjibone/lightwavegogo get github.com/ant0ine/go-json-rest/rest(required forlwserveronly)go install github.com/jimjibone/lightwavego/examples/...lwblinkandlwserverwill now both be in your PATH
This is basically the blink example we all know from microelectronics except that this time it's using your houses lights and it is able to dim them.
git clone https://github.com/jimjibone/lightwavego.gitcd lightwavegogo get github.com/jimjibone/lightwavego(if not done already)go install github.com/jimjibone/lightwavego(if not done already)go build examples/lwblink/lwblink.gosudo ./lwblink(sudo required for GPIO access)
This sets up a simple RESTful JSON server that is able to receive byte buffers of pre-compiled commands and use the library to broadcast them over your transmitter.
- Follow the instructions above for the Blink example, but now do:
go build examples/lwserver/lwserver.gosudo ./lwserver(sudo also required here for the GPIO access)curl -i -d '{"Buffer":"090f0301050903000102"}' http://localhost:8080/sendwill turn a light on to max brightness
For development there are some other requirements. Don't worry about these if you are just building to run.
To automatically create a nice human friendly representation of the various constants within types.go we will use stringer along with go generate. When we call go generate on the command line, generate will automatically find the stringer command within the types.go file and execute it. It will create a new go file that will help translate the constants into strings, easy.
go get golang.org/x/tools/cmd/stringergo generate- Build away.