Cannot change color and color temperature in SmartThings

[tripleS-Dev]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate
• Read the documentation to confirm the issue is not addressed there and your configuration is set correctly
• Tested with the latest version to ensure the issue hasn't been fixed

How often does this bug occurs?

always

Expected behavior

It should be possible to change the color and color temperature using the SmartThings app.

Actual behavior (suspected bug)

The SmartThings app does not provide an option to change colors. Although there is an option to adjust color temperature, it does not actually work. Only the power button and brightness adjustment work correctly.

Error logs or terminal output

I (360955) low_code_core: reporting endpoint: 1, cluster: 768, attribute: 7
I (360963) device_features_internal: send request received for endpoint: 1
app_main: Feature update: color temperature: 400
app_driver: Setting light temperature: 2500
I (360973) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000007 is 400 **********
I (365698) esp_matter_command: Received command 0x0000000A for endpoint 0x0001's cluster 0x00000300
I (365698) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x0000000F is 0 **********
I (365708) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000006's Attribute 0x00000000 is 1 **********
I (365720) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x0000400B is 0 **********
I (365732) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x0000400C is 65279 **********
I (365744) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000008 is 2 **********
I (365756) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000007 is 400 **********
I (365768) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000007 is 400 **********
I (365780) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000002 is 0 **********
I (365796) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000002 is 0 **********
I (365803) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000007 is 400 **********
I (365815) esp_matter_attribute: ********** W : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000007 is 219 **********
matter_one_core: Current Free Memory: 186940, Minimum Ever Free Size: 146576, Largest Free Block: 151552
I (365837) low_code_core: reporting endpoint: 1, cluster: 768, attribute: 7
I (365844) device_features_internal: send request received for endpoint: 1
app_main: Feature update: color temperature: 219
app_driver: Setting light temperature: 4566
I (365854) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000300's Attribute 0x00000007 is 219 **********
I (381264) esp_matter_command: Received command 0x00000004 for endpoint 0x0001's cluster 0x00000008
I (381265) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000008's Attribute 0x00000000 is 27 **********
I (381275) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000006's Attribute 0x00000000 is 1 **********
I (381287) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000006's Attribute 0x0000FFFC is 0 **********
I (381302) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000008's Attribute 0x00000000 is 27 **********
I (381311) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000008's Attribute 0x00000000 is 27 **********
I (381323) esp_matter_attribute: ********** W : Endpoint 0x0001's Cluster 0x00000008's Attribute 0x00000000 is 236 **********
matter_one_core: Current Free Memory: 185036, Minimum Ever Free Size: 146576, Largest Free Block: 151552
I (381344) low_code_core: reporting endpoint: 1, cluster: 8, attribute: 0
I (381352) device_features_internal: send request received for endpoint: 1
I (381359) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000008's Attribute 0x0000000F is 0 **********
I (381371) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000006's Attribute 0x00000000 is 1 **********
I (381383) esp_matter_attribute: ********** R : Endpoint 0x0001's Cluster 0x00000008's Attribute 0x00000001 is 0 **********
app_main: Feature update: brightness: 236
app_driver: Setting light brightness: 92
light_driver_set_brightness(92)

Steps to reproduce the behavior

Apply the light_rgbcw_ws2812 directly and register it in the SmartThings app.

Project release version

Latest and previous versions

System architecture

Intel/AMD 64-bit (modern PC, older Mac)

Operating system

Windows

Operating system version

windows 11 24h2

Shell

other (details in Additional context)

Additional context

This is the screenshot of the app interface:

There are no UI elements available for changing colors, and the color temperature adjustment does not function. The device only operates using the default color (green). Only brightness and On/Off functions are operational.

Please let me know if additional information is required.

[gautam-dev-maker]

Hi @tripleS-Dev ,

SmartThings doesn’t seem to display optional features. In light_rgbcw_ws2812 product, we’ve used the color_temperature_light device type from Matter and enabled optional features for hue and saturation. The device correctly advertises support for these features, and they are recognized by other ecosystems.

However, SmartThings does not show them. As a temporary workaround, you can switch to the extended_color_light device type, which includes XY color as a mandatory feature. This is reflected in the attached data model. With this, SmartThings will show color controls — but note that it reports color in XY format, so the application must handle that.

I've attached the data_model.txt with the extended_color_light feature for you to test. Please:

1. Download it and rename it to data_model.zap.
2. Replace the existing file at:

light_rgbcw_ws2812/configuration/data_model.zap

3. Run upload configuration.
4. Factory reset the device and add it again in smartthings.

This should make it work as expected with SmartThings. Let me know if you run into any issues.

[tripleS-Dev]

It displays as expected in SmartThings. Thank you!

tripleS-Dev@969f353
I modified it to call smartthings' XY as light_driver_set_hue and light_driver_set_saturation.

Where should I add code like this?
{ .cluster_id = 0x0300, .attribute_id = 0x0003, .feature_id = LOW_CODE_FEATURE_ID_COLOR_X }

I read the README.md, but I didn't understand it.

[gautam-dev-maker]

@tripleS-Dev Glad to hear the new data_model is working for you!

Just a quick note: the feature IDs are mapped internally in the system firmware, so simply adding a new feature ID in low_code.h won’t have any effect. Instead, you can use the low_level feature type for this.

You can handle it in feature_update_from_system() (in app_main.cpp) directly comparing the Matter cluster_id and attribute_id like so:

uint16_t endpoint_id = data->details.endpoint_id;
uint32_t cluster_id = data->details.low_level.matter.cluster_id;
uint32_t attribute_id = data->details.low_level.matter.attribute_id;

if (endpoint_id == 1) {
    if (cluster_id == 0x0300 && attribute_id == 0x0003) {
        uint16_t current_x = *(uint16_t *)data->value.value;
        printf("%s: Received Current x: %d\n", TAG, current_x);
    }
}

You can apply a similar check for current_y (attribute: 0x0004) as well.

Let me know if you need help integrating this further!

[tripleS-Dev]

Thank you so much for your help. I implemented it in this fork.

However, there is a very minor issue.

When attempting to change colors in SmartThings, there is a noticeable visual movement, especially when changing from blue. This phenomenon occurs even when only data_model.zap is applied to the original main branch.

IMG_1066-00.00.01.423-00.00.06.671.MOV

This issue exists with other colors as well, except for deep blue and deep red, but it is not as noticeable with other colors except for deep blue and deep red.

IMG_1071-00.00.01.949-00.00.08.824.MOV

[gautam-dev-maker]

Hi @tripleS-Dev , glad to hear extended color light worked out for you!

We’re also observing the same issue with SmartThings, and encountered similar behavior when testing with the Apple ecosystem. Based on our findings, the issue appears to originate from the ecosystem UI rather than the LowCode interface. We will try to reach out to the ecosystems team to get to the bottom of it.