Your Lynx Fleet device will regularly send data to Lynx Fleet. If data hasn't been received from your device for 35 minutes or more, your device is considered offline by Lynx Fleet.
In this article:
Lynx Device Communication
During commissioning, the TRU will be associated with a trailer and a device, collectively referred to as an asset. The Lynx device will gather information from the TRU and connected sensors, sending data to Lynx Fleet periodically.
If the asset is in an area with poor internet connectivity, the device will store the data until it can connect to Lynx Fleet. If Lynx Fleet hasn't received data from the device in 35 minutes or more, it considers the device to be offline. Once the device can reconnect to Lynx Fleet, the collected data will be ingested into the application and will be visible in the temperature chart, route replay, and asset history.
Live Status Widget: Assets Offline
The Live Status widget on the Asset Tracking page includes a tile that shows a count of assets whose devices haven't communicated with Lynx Fleet for more than 35 minutes.
You can click on the "Asset offline >35min" tile to filter the map and the asset table to show only those assets that are considered offline. The map icon will show the last location of the asset.
Determining When Device was Last Online
There are several places in Lynx Fleet where you can see the last time the application received data from the Lynx device for an asset.
Asset Tracking
The "Last Online" column in the Asset Tracking table shows the amount of time since the Lynx Fleet application last received data for that asset. If the device hasn't communicated with Lynx Fleet in over 35 minutes, the asset is considered Offline and the value will show in gray.
The pop-up from the map when clicking on an asset will show an indicator if the asset is offline.
The detailed pop-up from the map will show a message in a gray box if the asset is offline.
Asset Details
The Asset Details header will show an "Offline" status if the device hasn't sent data in 35 or more minutes. The right side of the header will show the last time data was received for the asset.
Data When Asset is Offline
Some fields will be displayed differently if the asset is offline. Fields can be:
Available - Value displayed
Not Available - Value is not displayed
Last Known Value - Displays the last value from when device last communicated. For offline assets, this value will typically display in a gray color.
Fields that are not impacted by the asset being online vs. offline are not included in this table.
Offline is defined as the device not sending data for 35 minutes or more.
Field | Asset Online | Asset Offline |
Last Updated | Available | Last Known Value |
Device Serial Number | Available | Last Know Value |
TRU Serial Number | Available | Last Known Value |
Asset Status | Available | Last Known Value |
TRU Status | Available | Not Available |
Device External Power Voltage | Available | Last Known Value |
Asset Health | Available | Not Available |
Active Alarms | Available | Last Known Value |
Inactive Alarms | Available | Last Known Value |
Power Mode | Available | Not Available |
Control Mode | Available | Not Available |
TRU Control System Type | Available | Not Available |
Condenser Air Temperature | Available | Not Available |
Rear Door Sensor (if connected to device or TRU) | Available | Not Available |
Side Door Sensor (if connected to device or TRU) | Available | Not Available |
TRU Fuel Sensor (if connected to device or TRU) | Available | Last Known Value |
TRU Battery Voltage | Available | Last Known Value |
TRU Software Version | Available | Last Known Value |
DataCold Rear (1-4) Sensor | Available | Last Known Value |
DataCold Side (1-4) Sensor | Available | Last Known Value |
DataCold Fuel Level (1-3) | Available | Last Known Value |
Humidity Setpoint Engineless | Available | Not Available |
Compartment (1-3) Setpoint | Available | Not Available |
Compartment (1-3) TRU Operating Mode | Available | Not Available |
Compartment (1-3) Supply Air Temperature (TRU) | Available | Not Available |
Compartment (1-3) Return Air Temperature (TRU) | Available | Not Available |
Compartment (1-3) BOX One-wire | Available | Last Known Value |
Compartment (1-3) BOX DataCold | Available | Last Known Value |
Compartment (1-3) Return Air One-wire | Available | Last Known Value |
Compartment (1-3) Return Air DataCold | Available | Last Known Value |
Compartment (1-3) Supply Air One-wire | Available | Last Known Value |
Compartment (1-3) Supply Air DataCold | Available | Last Known Value |
Lifetime Switch On Hours | Available | Last Known Value |
Lifetime Engine Hours | Available | Last Known Value |
Lifetime Electric Hours | Available | Last Known Value |
Device Battery Current | Available | Last Known Value |
Device Battery Voltage | Available | Last Known Value |
Location (Latitude & Longitude) | Available | Last Known Value |
Address | Available | Last Known Value |
Related Articles
TRU Power Status - Different information is available for your asset depending on the TRU status
Asset Details - View details about an individual asset
Asset Tracking - Get a live overview of your fleet
Have More Questions?
Contact Carrier at lynx-support@carrier.com for more information.