M-Bus (Meter-Bus) library and examples

[Fahd]

See the point 4 again, You have to create objects in the sub group '2/1/' based on the instructions. If you want to use different one then change this in line 10.

Okay,
 that's what I did.
1 - I have created  4-byte unsigned objects, "32/1/1, 32/1/2, 32/1/3, 32/1/4 ".
2 - Activated the script below 
After that I got a value only on the first object 32/1/1 the other once doesn't update at all, and it looks like the 4 ids are writing their value on the 32/1/1

Code:

-- config init
if not meters then
  require('mbus')

  -- time to wait between each meter read
  sleeptime = 10
  mbus.init('/dev/RS232', 9600)
  -- base address for meter values, meter short address will be added to form the meters group address
  base = '32/1/'

  -- meter definition
  -- addr - short address
  -- id - number from data table where value resides
  -- div - optional divisor for convertion to the final value
 meters = {
   { addr = 1, id = 6},
    { addr = 1, id = 7},
    { addr = 1, id = 8},
    { addr = 1, id = 9},
   
 }


  -- reset meter values on first run
  for _, meter in ipairs(meters) do
    meter.value = 0
  end
end

-- read each meter
for _, meter in ipairs(meters) do
  res = mbus.getdata(meter.addr)

  -- read ok
  if type(res) == 'table' then
    data = res.data[ meter.id ]
    value = nil

    -- get current value
    if type(data) == 'table' then
      value = tonumber(data.value)
     
    end

    -- value is valid and different from previous read
    if value and meter.value ~= value then
      -- apply divisor if set
      div = meter.div
      dpt = div and dt.float32 or dt.uint32
      if div then
        value = value / div
      end

      -- update group address value
      grp.update(base .. tostring(meter.addr), value, dpt)
      meter.value = value
    end
  end

  -- wait for next read
  os.sleep(sleeptime)
end