The write function is ignored defined by DDF for window covering device

[LukasA83]

Does the issue really belong here?

• I definitively want to report a bug within deCONZ or its REST-API

Is there already an existing issue for this?

• I have searched the existing issues and there is none for the bug at hand

Describe the bug

I have a Merten Windows covering device, which is functioning great, but the position is reversed (0 is closed). I applied a fix in the ddf, see below. It works for reading the values, but not for sending the values via REST API.

{ "schema": "devcap1.schema.json", "manufacturername": "Schneider Electric", "modelid": "1GANG/SHUTTER/1", "vendor": "Schneider Electric", "product": "Merten Wiser cover controller (MEG5113-0300)", "sleeper": false, "status": "Gold", "path": "/devices/meg5113-0300_cover_controller_custom.json", "subdevices": [ { "type": "$TYPE_WINDOW_COVERING_DEVICE", "restapi": "/lights", "uuid": [ "$address.ext", "0x05" ], "items": [ { "name": "attr/id" }, { "name": "attr/lastannounced" }, { "name": "attr/lastseen" }, { "name": "attr/manufacturername" }, { "name": "attr/modelid" }, { "name": "attr/name" }, { "name": "attr/swversion" }, { "name": "attr/type" }, { "name": "attr/uniqueid" }, { "name": "state/lift", "refresh.interval": 300, "read": { "at": "0x0008", "cl": "0x0102", "ep": 0, "fn": "zcl:attr" }, "write": { "cl": "0x0102", "cmd": "0x05", "ep": 0, "eval": "100-Item.val;", "fn": "zcl:cmd" }, "parse": { "at": "0x0008", "cl": "0x0102", "ep": 5, "eval": "Item.val = Attr.val == 255 ? 50 : (100 - Attr.val);", "fn": "zcl:attr" }, "default": 0 }, { "name": "state/open", "parse": { "at": "0x0008", "cl": "0x0102", "ep": 5, "eval": "Item.val = Attr.val != 0;", "fn": "zcl:attr" } }, { "name": "state/reachable" } ] } ], "bindings": [ { "bind": "unicast", "src.ep": 5, "cl": "0x0102", "report": [ { "at": "0x0008", "dt": "0x20", "min": 1, "max": 300, "change": "0x00000001" } ] } ] }

Steps to reproduce the behavior

1. Apply DDF
2. Read "lift" attribute via Rest API -> Works e.g. 51
3. Write "lift:51" attribute via Rest API -> The command works
4. Read "lift" attribute via Rest API -> Fail, indicates 49

Expected behavior

DDF write expression is applied when sending values via RestAPI.

Screenshots

No response

Environment

• Host system: (Raspberry Pi )
• Running method: (deconz-docker container)
• Firmware version: (26780700)
• deCONZ version (not Home assistant Addon version!): (2.29.0)
• Device: (RaspBee II)

deCONZ Logs

When watching the Debug view, I see the JS function applied for reading, but not for writing.

Additional context

No response

[Smanar]

Yes, it's a know issue, it's for that the support for covering that use the tuya cluster is not possible.

[LukasA83]

Hi Smanar,

Thanks for prompt response. It is not a Tuya device / has a Tuya cluster?!

So it is not possible to transform the written value via DDF, correct understanding?

[Smanar]

So it is not possible to transform the written value via DDF, correct understanding?

Yes, it's possible to reverse the return from the device, but not possible to "custom" requests.

There is a PR in draft state here https://github.com/dresden-elektronik/deconz-rest-plugin/pull/7840/files