LINEAR POT SENSOR

Specification

What		Comments
Identifier	LINEAR_POT	![](http://git.whitecatboard.org/pot.png
Interface	ADC
Provides	val	Potentiometer % value, from 0.0 to 1. 0 is 0%, 1.0 is 100%, 0.5 is 50%.
Properties	none
Callbacks?	no

Code

In this example a potentiometer is used to control the brightness of a led (using PWM).

-- Attach a led at GPIO32
led = pwm.attach(pio.GPIO32, 1000, 0)
led:start()
      
-- Attach a potentiometer connected to an external ADC (ADS1115) / cannel 0
s = sensor.attach("LINEAR_POT", adc.ADS1115, 0)

-- Read potentiometer value every 10 msecs
thread.start(function()
  while true do
    tmr.delayms(10)
    led:setfreq(1000)
    led:setduty(s:read("val"))
  end
end)