gpio.mode(2, gpio.INPUT)

gpio.mode(5, gpio.OUTPUT)

gpio.write(5, gpio.LOW)

pwm.setup(5, 1000, 1023)

pwm.start(5)


start = tmr.now();

local function zc_callback(level, pulse)
    pwm.setduty(5, 0);

    tmr.alarm(1, 7, tmr.ALARM_SINGLE, function()
        pwm.setduty(5, 1023);
    end)
end

gpio.trig(2, "up", zc_callback)