Question on Daikin DIII net protocol

[kevinzh]

You need to modify the profile to allow raw value to be written to the control register.

Code:

{ "name": "on_off_status_00", "bus_datatype": "bool", "type": "inputregister", "address": 2000, "value_bitmask": 0x0001},
{ "name": "set_temp_status_00", "bus_datatype": "float16", "type": "inputregister", "address": 2002, "value_multiplier": 0.1, "units": "C" },
{ "name": "act_temp_status_00", "bus_datatype": "float16", "type": "inputregister", "address": 2004, "value_multiplier": 0.1, "units": "C" },
{ "name": "control_00", "bus_datatype": "uint16", "type": "register", "writable": 1, "write_only": true, "address": 2000 },
{ "name": "set_mode_00", "bus_datatype": "uint8", "type": "register", "writable": 1, "write_only": true, "address": 2001 },
{ "name": "set_temp_00", "bus_datatype": "float16", "type": "register", "writable": 1, "write_only": true, "value_multiplier": 0.1, "address": 2002, "units": "C"},

You will also need 3 objects: on/off (bool), fan direction (1 byte unsigned), fan volume (either bool or 1 byte unsigned depending on 2 or 3 step fan)
All objects must have the same tag assigned to them, then you need to create an event script attached to this tag.

Change group addresses as needed, 1/1/4 is the group that is mapped to control register of ModBus device.

Code:

onoff = grp.getvalue('1/1/1') and 1 or 0
direction = grp.getvalue('1/1/2')
volume = grp.getvalue('1/1/3')

if direction > 7 or direction == 5 then
  direction = 6
end

if type(volume) == 'boolean' then
  volume = volume and 1 or 5
elseif volume ~= 1 and volume ~= 3 and volume ~= 5 then
  volume = 1
end

value = bit.bor(
  onoff,
  bit.lshift(6, 4),
  bit.lshift(direction, 8),
  bit.lshift(volume, 12)
)

grp.update('1/1/4', value)