Add step functionality to Zigbee curtains using Common Handler.

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-aqara-roller-shade-rotate.yml

@@ -6,6 +6,8 @@ components:
         version: 1
       - id: windowShadeLevel
         version: 1
+      - id: statelessWindowShadeLevelStep
+        version: 1
       - id: stse.initializedStateWithGuide
         version: 1
       - id: stse.shadeRotateState

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-aqara.yml

@@ -6,6 +6,8 @@ components:
         version: 1
       - id: windowShadeLevel
         version: 1
+      - id: statelessWindowShadeLevelStep
+        version: 1
       - id: stse.deviceInitialization
         version: 1
       - id: firmwareUpdate

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-battery.yml

@@ -8,6 +8,8 @@ components:
     version: 1
   - id: windowShadeLevel
     version: 1
+  - id: statelessWindowShadeLevelStep
+    version: 1
   - id: battery
     version: 1
   - id: firmwareUpdate

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-no-preset.yml

@@ -8,6 +8,8 @@ components:
     version: 1
   - id: windowShadeLevel
     version: 1
+  - id: statelessWindowShadeLevelStep
+    version: 1
   - id: firmwareUpdate
     version: 1
   - id: refresh

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-powerSource.yml

@@ -6,6 +6,8 @@ components:
         version: 1
       - id: windowShadeLevel
         version: 1
+      - id: statelessWindowShadeLevelStep
+        version: 1
       - id: windowShadePreset
         version: 1
       - id: powerSource

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-profile-no-firmware-update.yml

@@ -8,6 +8,8 @@ components:
     version: 1
   - id: windowShadeLevel
     version: 1
+  - id: statelessWindowShadeLevelStep
+    version: 1
   - id: refresh
     version: 1
   categories:

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-profile.yml

@@ -8,6 +8,8 @@ components:
     version: 1
   - id: windowShadeLevel
     version: 1
+  - id: statelessWindowShadeLevelStep
+    version: 1
   - id: firmwareUpdate
     version: 1
   - id: refresh

drivers/SmartThings/zigbee-window-treatment/profiles/window-treatment-reverse.yml

@@ -6,6 +6,8 @@ components:
     version: 1
   - id: windowShadeLevel
     version: 1
+  - id: statelessWindowShadeLevelStep
+    version: 1
   - id: windowShadePreset
     version: 1
   - id: firmwareUpdate

drivers/SmartThings/zigbee-window-treatment/src/hanssem/init.lua

@@ -25,8 +25,6 @@ local TUYA_CLUSTER = 0xEF00
 local DP_TYPE_VALUE = "\x02"
 local DP_TYPE_ENUM = "\x04"
 
-local SeqNum = 0
-
 -------- Send Command Function for Tuya Zigbee device -------------
 -- ZigbeeMessageTx:
 --    Uint16: 0x0000
@@ -45,6 +43,14 @@ local SeqNum = 0
 --        ReadAttribute:
 --            AttributeId: 0x0000
 
+-- Get next sequence number for Tuya commands (per-device storage to avoid counter conflicts)
+local function get_next_tuya_seq_num(device)
+  local seq = device:get_field("tuya_seq_num") or 0
+  seq = (seq + 1) % 65536
+  device:set_field("tuya_seq_num", seq)
+  return seq
+end
+
 local function SendCommand(device, DpId, Type, Value)
   local addrh = Messages.AddressHeader(
     ZigbeeConstants.HUB.ADDR, 					-- Source Address
@@ -57,8 +63,7 @@ local function SendCommand(device, DpId, Type, Value)
   local zclh = ZigbeeZcl.ZclHeader({cmd = data_types.ZCLCommandId(0x00)})
   zclh.frame_ctrl:set_cluster_specific()	-- sets this frame control field to be cluster specific
   -- Make a payload body
-  SeqNum = (SeqNum + 1) % 65536
-  local strSeqNum = string.pack(">I2", SeqNum)  -- Pack the Sequence number to 2 bytes unsigned integer type with big endian.
+  local strSeqNum = string.pack(">I2", get_next_tuya_seq_num(device))  -- Pack the Sequence number to 2 bytes unsigned integer type with big endian.
   local LenOfValue = string.pack(">I2",string.len(Value))  -- Pack length of Value to 2 bytes unsigned integer type wiht big endian.
   local PayloadBody = generic_body.GenericBody(strSeqNum .. DpId .. Type .. LenOfValue .. Value)
   local MsgBody = ZigbeeZcl.ZclMessageBody({zcl_header = zclh, zcl_body = PayloadBody})

drivers/SmartThings/zigbee-window-treatment/src/init.lua

@@ -40,7 +40,10 @@ local zigbee_window_treatment_driver_template = {
     [capabilities.windowShadePreset.ID] = {
       [capabilities.windowShadePreset.commands.setPresetPosition.NAME] = window_shade_utils.set_preset_position_cmd,
       [capabilities.windowShadePreset.commands.presetPosition.NAME] = window_shade_utils.window_shade_preset_cmd,
-    }
+    },
+    [capabilities.statelessWindowShadeLevelStep.ID] = {
+      [capabilities.statelessWindowShadeLevelStep.commands.stepShadeLevel.NAME] = window_shade_utils.step_shade_level_handler()
+    },
   },
   lifecycle_handlers = {
     init = init_handler,

drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/can_handle.lua

@@ -0,0 +1,22 @@
+-- Copyright 2025 SmartThings, Inc.
+-- Licensed under the Apache License, Version 2.0
+
+local function invert_lift_percentage_can_handle(opts, driver, device, ...)
+  local somfy_can_handle = require("inverted-lift.somfy.can_handle")
+  local yoolax_can_handle = require("inverted-lift.yoolax.can_handle")
+  local rooms_beautiful_can_handle = require("inverted-lift.rooms-beautiful.can_handle")
+  local vimar_can_handle = require("inverted-lift.vimar.can_handle")
+  if somfy_can_handle(opts, driver, device)
+    or yoolax_can_handle(opts, driver, device)
+    or rooms_beautiful_can_handle(opts, driver, device)
+    or vimar_can_handle(opts, driver, device)
+    or device:get_manufacturer() == "IKEA of Sweden"
+    or device:get_manufacturer() == "Smartwings"
+    or device:get_manufacturer() == "Insta GmbH"
+  then
+    return true, require("inverted-lift")
+  end
+  return false
+end
+
+return invert_lift_percentage_can_handle

drivers/SmartThings/zigbee-window-treatment/src/invert-lift-percentage/init.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/init.lua

@@ -56,21 +56,21 @@ local function current_position_attr_handler(driver, device, value, zb_rx)
   end
 end
 
-local function set_shade_level(device, value, command)
+local function set_shade_level_helper(device, value, command)
   local level = 100 - value
   device:send_to_component(command.component, WindowCovering.server.commands.GoToLiftPercentage(device, level))
 end
 
-local function window_shade_level_cmd(driver, device, command)
-  set_shade_level(device, command.args.shadeLevel, command)
+local function set_shade_level_handler(driver, device, command)
+  set_shade_level_helper(device, command.args.shadeLevel, command)
 end
 
-local function window_shade_preset_cmd(driver, device, command)
+local function preset_position_handler(driver, device, command)
   local level = window_shade_utils.get_preset_level(device, command.component)
-  set_shade_level(device, level, command)
+  set_shade_level_helper(device, level, command)
 end
 
-local ikea_window_treatment = {
+local inverted_window_treatment = {
   NAME = "inverted lift percentage",
   zigbee_handlers = {
     attr = {
@@ -80,14 +80,19 @@ local ikea_window_treatment = {
     }
   },
   capability_handlers = {
+    [capabilities.statelessWindowShadeLevelStep.ID] = {
+      [capabilities.statelessWindowShadeLevelStep.commands.stepShadeLevel.NAME] =
+        window_shade_utils.step_shade_level_handler(true) -- invert_shade_level is true for devices under this subdriver
+    },
     [capabilities.windowShadeLevel.ID] = {
-      [capabilities.windowShadeLevel.commands.setShadeLevel.NAME] = window_shade_level_cmd
+      [capabilities.windowShadeLevel.commands.setShadeLevel.NAME] = set_shade_level_handler
     },
     [capabilities.windowShadePreset.ID] = {
-      [capabilities.windowShadePreset.commands.presetPosition.NAME] = window_shade_preset_cmd
-    }
+      [capabilities.windowShadePreset.commands.presetPosition.NAME] = preset_position_handler
+    },
   },
-  can_handle = require("invert-lift-percentage.can_handle"),
+  can_handle = require("inverted-lift.can_handle"),
+  sub_drivers = require("inverted-lift.sub_drivers")
 }
 
-return ikea_window_treatment
+return inverted_window_treatment

drivers/SmartThings/zigbee-window-treatment/src/rooms-beautiful/can_handle.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/rooms-beautiful/can_handle.lua

@@ -2,10 +2,10 @@
 -- Licensed under the Apache License, Version 2.0
 
 local is_zigbee_window_shade = function(opts, driver, device)
-  local FINGERPRINTS = require("rooms-beautiful.fingerprints")
+  local FINGERPRINTS = require("inverted-lift.rooms-beautiful.fingerprints")
   for _, fingerprint in ipairs(FINGERPRINTS) do
     if device:get_manufacturer() == fingerprint.mfr and device:get_model() == fingerprint.model then
-      return true, require("rooms-beautiful")
+      return true, require("inverted-lift.rooms-beautiful")
     end
   end
   return false

drivers/SmartThings/zigbee-window-treatment/src/rooms-beautiful/init.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/rooms-beautiful/init.lua

@@ -108,7 +108,7 @@ local rooms_beautiful_handler = {
     init = battery_defaults.build_linear_voltage_init(2.5, 3.0),
     infoChanged = info_changed
   },
-  can_handle = require("rooms-beautiful.can_handle"),
+  can_handle = require("inverted-lift.rooms-beautiful.can_handle"),
 }
 
 return rooms_beautiful_handler

drivers/SmartThings/zigbee-window-treatment/src/somfy/can_handle.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/somfy/can_handle.lua

@@ -2,10 +2,10 @@
 -- Licensed under the Apache License, Version 2.0
 
 local is_zigbee_window_shade = function(opts, driver, device)
-  local FINGERPRINTS = require("somfy.fingerprints")
+  local FINGERPRINTS = require("inverted-lift.somfy.fingerprints")
   for _, fingerprint in ipairs(FINGERPRINTS) do
       if device:get_manufacturer() == fingerprint.mfr and device:get_model() == fingerprint.model then
-          return true, require("somfy")
+          return true, require("inverted-lift.somfy")
       end
   end
   return false

drivers/SmartThings/zigbee-window-treatment/src/somfy/init.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/somfy/init.lua

@@ -109,7 +109,7 @@ local somfy_handler = {
       }
     }
   },
-  can_handle = require("somfy.can_handle"),
+  can_handle = require("inverted-lift.somfy.can_handle"),
 }
 
 return somfy_handler

drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/sub_drivers.lua

@@ -0,0 +1,11 @@
+-- Copyright 2026 SmartThings, Inc.
+-- Licensed under the Apache License, Version 2.0
+
+local lazy_load_if_possible = require "lazy_load_subdriver"
+local sub_drivers = {
+  lazy_load_if_possible("inverted-lift.vimar"),
+  lazy_load_if_possible("inverted-lift.yoolax"),
+  lazy_load_if_possible("inverted-lift.rooms-beautiful"),
+  lazy_load_if_possible("inverted-lift.somfy"),
+}
+return sub_drivers

drivers/SmartThings/zigbee-window-treatment/src/vimar/can_handle.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/vimar/can_handle.lua

@@ -2,10 +2,10 @@
 -- Licensed under the Apache License, Version 2.0
 
 local is_zigbee_window_shade = function(opts, driver, device)
-  local FINGERPRINTS = require("vimar.fingerprints")
+  local FINGERPRINTS = require("inverted-lift.vimar.fingerprints")
   for _, fingerprint in ipairs(FINGERPRINTS) do
       if device:get_manufacturer() == fingerprint.mfr and device:get_model() == fingerprint.model then
-          return true, require("vimar")
+          return true, require("inverted-lift.vimar")
       end
   end
   return false

drivers/SmartThings/zigbee-window-treatment/src/vimar/init.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/vimar/init.lua

@@ -154,7 +154,7 @@ local vimar_handler = {
   lifecycle_handlers = {
     init = device_init
   },
-  can_handle = require("vimar.can_handle"),
+  can_handle = require("inverted-lift.vimar.can_handle"),
 }
 
 return vimar_handler

drivers/SmartThings/zigbee-window-treatment/src/yoolax/can_handle.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/yoolax/can_handle.lua

@@ -2,10 +2,10 @@
 -- Licensed under the Apache License, Version 2.0
 
 local function is_yoolax_window_shade(opts, driver, device)
-  local FINGERPRINTS = require("yoolax.fingerprints")
+  local FINGERPRINTS = require("inverted-lift.yoolax.fingerprints")
   for _, fingerprint in ipairs(FINGERPRINTS) do
     if device:get_manufacturer() == fingerprint.mfr and device:get_model() == fingerprint.model then
-      return true, require("yoolax")
+      return true, require("inverted-lift.yoolax")
     end
   end
   return false

drivers/SmartThings/zigbee-window-treatment/src/yoolax/init.lua → drivers/SmartThings/zigbee-window-treatment/src/inverted-lift/yoolax/init.lua

@@ -138,7 +138,7 @@ local yoolax_window_shade = {
       }
     },
   },
-  can_handle = require("yoolax.can_handle"),
+  can_handle = require("inverted-lift.yoolax.can_handle"),
 }
 
 return yoolax_window_shade

drivers/SmartThings/zigbee-window-treatment/src/sub_drivers.lua

@@ -3,14 +3,10 @@
 
 local lazy_load_if_possible = require "lazy_load_subdriver"
 local sub_drivers = {
-   lazy_load_if_possible("vimar"),
    lazy_load_if_possible("aqara"),
    lazy_load_if_possible("feibit"),
-   lazy_load_if_possible("somfy"),
-   lazy_load_if_possible("invert-lift-percentage"),
-   lazy_load_if_possible("rooms-beautiful"),
+   lazy_load_if_possible("inverted-lift"),
    lazy_load_if_possible("axis"),
-   lazy_load_if_possible("yoolax"),
    lazy_load_if_possible("hanssem"),
    lazy_load_if_possible("screen-innovations"),
    lazy_load_if_possible("VIVIDSTORM"),