BotLib Demo1

demo1.lua

#!/usr/bin/lua
--- Imports the botlib libraries that support this demo.
lib = require("botlibsensor")
GPIO = require("botlibgpio")
--- Creates a simple function to sleep before each sensor read.
function sleep(n)
  os.execute("sleep " .. tonumber(n))
end
--- Configures the hardware.
sensor = lib.new("Range#1","HC-SR04",18,24)
pin = GPIO(25,"out")
--- Logic of the simple demo. 
while (true) do
  --- Thread sleep for 05 ms.
  sleep(0.05)
  --- Gets the distance value from component read.
  distance = sensor:read()
  --- If statement to check if distance is greater or less than 10 cm.
  if (distance > 10) then 
    --- Turns the LED off.
    pin:write(0)
  else 
    --- Turns the LED on.
    pin:write(1)
  end
  --- print(distance)
end