Control CCT Group

Control CCT Group by adjusting their lightness and color temperature.

Description

The CCT Group control allows you to manage tunable white LED lights by setting:

• Dimming level (0-100%)
• Color temperature (0-100%, mapped to 2700K-6500K)

Example

Request Topic

LYT/41e0d6b2-37de-43d8-a348-4ba94853b6cd/GROUP/CONTROL

Adjust both lightness and temperature:

{
   "version": "v1.0",
   "type": "cct",
   "address": 50646,
   "dimming": 10,
   "color_temperature": 100
}

Adjust only lightness:

{
   "version": "v1.0",
   "type": "cct",
   "address": 50646,
   "dimming": 10
}

Adjust only temperature:

{
   "version": "v1.0",
   "type": "cct": 50646,
   "color_temperature": 100
}

Field Descriptions

Field	Type	Range	Description
version	string	v1.0	API version identifier
type	string	"cct"	Message type for CCT control
address	number	group address	Unicast address of the target group
dimming	number	0-100	Brightness level in percentage
color_temperature	number	0-100	Color temperature in percentage where: - 0% = 2700K (warm white) - 100% = 6500K (cool white)

Response topic

LYT/41e0d6b2-37de-43d8-a348-4ba94853b6cd/GROUP/E/STATUS

Response Payload

Success Response

{
   "version": "v1.0",
   "message": "success",
   "type": "cct",
   "address": 50646,
   "cct": {
      "dimming": 40,
      "color_temperature": 100
   }
}

Error Handling

The API may return various error responses based on different scenarios. Here are the possible errors and their resolutions:

1. Constraint Error (Code: 3005)

a. Temperature Constraint:

{
   "message": "error",
   "message_type": {
      "code": 3005,
      "message": "color_temperature must not be greater than 100",
      "errorCode": "CONSTRAINT_ERROR"
   },
   "type": "cct",
   "address": 50646
}
OR 
{
   "message": "error",
   "message_type": {
      "code": 3005,
      "message": "color_temperature must not be less than 0",
      "errorCode": "CONSTRAINT_ERROR"
   },
   "type": "cct",
   "address": 50646
} 

b. Lightness Constraint:

{
   "message": "error",
   "message_type": {
      "code": 3005,
      "message": "dimming must not be greater than 100",
      "errorCode": "CONSTRAINT_ERROR"
   },
   "type": "cct",
   "address": 50646
}
OR
{
   "message": "error",
   "message_type": {
      "code": 3005,
      "message": "dimming must not be less than 0",
      "errorCode": "CONSTRAINT_ERROR"
   },
   "type": "cct",
   "address": 50646
} 

c. Version Constraint:

{
   "message": "error",
   "message_type": {
      "code": 3005,
      "message": "version must be one of the following values: v1.0",
      "errorCode": "CONSTRAINT_ERROR"
   },
   "type": "cct",
   "address": 50646
}

d. Type Constraint:

{
   "message": "error",
   "message_type": {      
      "code": 3005,
      "message": "type must be one of the following values: cct, dimmer, switch, fan, curtain, rgb",
      "errorCode": "CONSTRAINT_ERROR"
   },
   "type": "cct",
   "address": 50646
}

e. Address Constraint:

{
   "message": "error",
   "message_type": {
      "code": 3005,
      "message": "address must be a number conforming to the specified constraints",
      "errorCode": "CONSTRAINT_ERROR"
   },
   "type": "cct",
   "address": 50646
}

Constraint errors occur in the following cases:

1. Color Temperature Constraints:

   • Color Temperature value exceeds 100%
   • Color Temperature field is missing
   • Color Temperature value is less than 0%

2. Dimming Constraints:

   • Dimming value exceeds 100%
   • Dimming field is missing
   • Dimming value is less than 0%

3. Version Constraints:

   • Version is not exactly "v1.0"
   • Version field is missing
   • Version field has incorrect format

4. Type Constraints:

   • Type must be one of: "cct", "dimmer", "switch", "fan", "curtain", "rgb"
   • Type field is missing
   • Type field has incorrect value

5. Address Constraints:

   • Address must be a number
   • Address field is missing
   • Address field has incorrect type (must be number)

Resolution:

• Ensure temperature is between 0-100
• Ensure lightness is between 0-100
• Always use "v1.0" as the version value
• Use correct type value from allowed list: "cct", "dimmer", "switch", "fan", "curtain", "rgb"
• Ensure address is a number
• Validate all parameters before sending

2. Group Not Found (Code: 3006)

{
   "message": "error",
   "message_type": {
      "code": 3006,
      "message": "Group not found",
      "errorCode": "GROUP_NOT_FOUND"
   },
   "type": "cct",
   "address": 50646
}

Occurs when:

• The specified group address doesn't exist
• Group is offline or unreachable
• Group has been removed from the network

Resolution:

• Verify group address is correct
• Check if group is powered and connected
• Confirm group is properly provisioned

3. Project Not Found (Code: 2002)

{
   "message": "error",
   "message_type": {
      "code": 2002,
      "message": "Project not found",
      "errorCode": "PROJECT_NOT_FOUND"
   },
   "type": "cct",
   "address": 50646
}

Occurs when:

• project_uuid in MQTT topic is invalid
• Project has been deleted
• User doesn't have access to the project

Resolution:

• Verify project_uuid
• Ensure project exists
• Check access permissions

4. Request Timeout (Code: 3002)

{
   "message": "error",
   "message_type": {
      "code": 3002,
      "message": "Request Timeout",
      "errorCode": "REQUEST_TIMEOUT"
   },
   "type": "cct",
   "address": 50646
}

Occurs when:

• Group doesn't respond within timeout period
• Network connectivity issues
• Group is busy processing other commands

Resolution:

• Check network connectivity
• Verify Group is responsive
• Retry the request
• Check for network congestion

Error Code Summary

Code	Error Code	Description	Solution
3005	CONSTRAINT_ERROR	Parameter validation failed	Check input values
3006	GROUP_NOT_FOUND	Group not available	Verify group status
2002	PROJECT_NOT_FOUND	Project doesn't exist	Check project_uuid
3002	REQUEST_TIMEOUT	Request took too long	Check connectivity