XATL — Temperature Sensor List

Manages the association between temperature sensor IDs and user-defined tags (A–J) for easy reference and event configuration.

Formats

Query a Tag

>QXATL{TAG}<

Response:

• >RXATL{TAG}{ID}< — ID associated with this tag
• >RXATL{TAG}U< — No ID associated with this tag

Field	Format	Description
TAG	Single letter (A–J)	Sensor tag
ID	14-hex chars	Sensor ID (DS18B20)

Associate a Sensor ID with a Tag

>SXATL{TAG}{ID}<

Response: Command accepted (association saved)

Field	Format	Description
TAG	Single letter (A–J)	User-defined tag
ID	14-hex chars	DS18B20 sensor ID

Remove Tag Association

>SXATL{TAG}U<

Response: Command accepted (association removed)

Examples

Query tag A:

>QXATLA<
>RXATLA28000013406C1001<   ← Tag A associated with this sensor

Query empty tag:

>QXATLF<
>RXATLFU<   ← Tag F has no association

Associate sensor with tag B:

>SXATLB28000013406C1002<
>SXATLB28000013406C1002<   ← Confirmed

Remove tag D association:

>SXATLD U<

Sensor ID Format

DS18B20 temperature sensor IDs are 14 hexadecimal characters:

28000013406C1001
├─ Family Code (2 hex): 28 (always for DS18B20)
└─ Serial Number (12 hex): 000013406C1001

Tags Available

Tag	Use Case
A–J	10 user-defined temperature sensors

Each tag can be associated with one sensor. Tags are used in:

• XATI — Query list of sensors
• XATO — Configure threshold alarms

Workflow

1. Identify sensors — Connect DS18B20 sensors to OneWire bus
2. Query available sensors — Use >QXATI< to see connected devices
3. Tag sensors — Use >SXATL{TAG}{ID}< to assign meaningful names
4. Configure thresholds — Use >SXATO{IDX}1{TAG}{SIGN}{VALUE}< to set alarm conditions
5. Monitor values — Use >QXATI< to read current temperatures

Example Setup

Assign tags to three temperature sensors:

>SXATLA28000013406C1001<     ← Engine temperature
>SXATLB28000013406C1002<     ← Cabin temperature
>SXATLC28000013406C1003<     ← Cargo temperature

Query the list:

>QXATI<
>RXATI28000013406C1001,A,+0850;28000013406C1002,B,+0200;28000013406C1003,C,+0150<

Configure threshold alarm for engine temperature (tag A > 100°C):

>SXATO01A+0100<

Related Commands

• XATI — Temperature Sensors Info (query sensor list and values)
• XATO — Temperature Thresholds (configure alarm conditions)

Notes

• Tags persist across device resets
• A sensor can only have one tag, but you can reassign tags
• Removing a tag does not affect the physical sensor connection
• Thresholds configured on a tag-based condition will use the last assigned sensor