Burnlight is a server and client for automating the control of the GPIO pins on a Raspberry Pi.

• Run custom schedules controlling one or more GPIO pins.
• Web API for remote management and monitoring.
• Paired input and output for feedback on controlled systems.

• Flask - Serves the API.
• gevent - Runs the scheduling threads.
• Lark parser - Parses BSL programs.
• gpiozero - Controls GPIO outputs on Raspberry Pi computers.

Install Burnlight using pip:

$ pip install burnlight

Start the server:

$ burnlightd

Create a file schedule.bsl with the following contents:

{
    loop 10: {
        (On,1),
        (Off,1)
    }
}

Add and start the schedule using the client

$ burnlight schedules add schedule.bsl --start_time now

Schedules are described with a simple language.

The following program will turn the on output for one second each minute for one hour.

{
    loop 60: {
        (On,1),
        (Off,59)
    }
}

BSL currently supports programs consisting of sequences of output statements and loops.

The simplest program possible is {}, which will do absolutely nothing. We can make it slightly more interesting by using output statements. An output statement takes the for (<state>,<duration>) where <state> is the desired output state, On or Off, and <duration> is the duration the output should be in that state in seconds.

The following program turns the output on for ten seconds:

{
    (On, 10),
    (Off, 1)
}