1-wire DS18B20 change resolution

[admin]

Here's a function you can use to calculate the average, this version will keep last count values and will returnt the average for every insert:

Code:

function avg(store, count, value)
  local sum = 0

  -- add new value as first (newest) store element
  table.insert(store, 1, value)

  -- remove old elements, until store size is correct
  while #store > count do
    table.remove(store)
  end

  -- calucate value sum
  for _, value in ipairs(store) do
    sum = sum + value
  end

  -- get average value
  return sum / #store
end

And here's how you can use it:

Code:

if not store then
  require('ow')
  -- load avg function here
  store = {}
end

value = ow.readfile('28.690E0A070000', 'temperature', true)
avgvalue = avg(store, 5, value)

You can add an extra counter in your resident script if you want to send a new value for each X samples.