Irrigation program

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You can create a sequence with any number of outputs this way, just modify the parameters and object list to suit your needs:

Code:

mintimer = 5 -- minimum timer value in seconds
maxtimer = 60 -- maximum timer value in seconds

objects = {
  {
    output = '1/1/1',
    timer = '2/1/1',
  },
  {
    output = '1/1/2',
    timer = '2/1/2',
  },
  {
    output = '1/1/3',
    timer = '2/1/3',
  }
}

function dosleep(obj)
  local timer = grp.getvalue(obj)
  timer = tonumber(timer)

  if timer then
    if timer < mintimer then
      timer = mintimer
    elseif timer > maxtimer then
      timer = maxtimer
    end

    sleep(timer)
  end
end

for _, item in ipairs(objects) do
  grp.write(item.output, true)
  dosleep(item.timer)
  grp.write(item.output, false)
end