Default I/O Mappings - Barra Range
Written by Matthew Clark-Massera
Updated at June 23rd, 2025
Here are the Default I/O Mappings for the Barra range of devices:
- Barra Core
- Barra Edge
- Barra GPS
You can change some of these mappings on Device Manager however, our default settings have been designed to prevent the need for making changes.
This mapping can be very handy to identify and debug issues, and when integrating the device data.
For example, if the device is connecting to the server/platform intermittently, this may be a coverage issue which can be confirmed by analyzing/plotting Analog 4 (Cellular Signal Strength).
| Analog Mapping | Description |
|---|---|
| 1 | Battery Voltage |
| 3 | Temperature |
| 4 | Cellular Signal Strength |
| 5 | Loaded Voltage |
| Digital Mapping | Description |
|---|---|
| 0 | Ignition |
| 1 | 'Battery Good' Flag 1 = Good 0 = Low |
| 2 | 'Battery Critical' Flag 1 = Critical |
For information on the battery flags, see Battery Level Monitoring.
All Digital Matter devices have 'status flags'. The status flags are sent in Field 2 to 3rd party servers. However, in Telematics Guru, they are remapped to the following Digital Inputs.
| Digital Mapping | Description |
|---|---|
| 24 | Trip State 1 = in trip |
| 25 | Battery Good 1 = good 0 = low |
| 29 | Battery Critical 1 = critical |
Barra Edge Additional Debug IO Mappings
The below values are (information about the Location Engine Position ‘Lookup’ are added to the below analogs.
They help to identify information about the fix
| Analog Mapping | Description | Note |
|---|---|---|
| 8 | Position Source |
This will be a numerical value corresponding to the ID of the ‘position source’ - i.e. GNSS, Cell, or Wi-Fi fix. |
| 9 | Number of GNSS Satellites | |
| 10 | Number of Beidou Satellites | |
| 11 | DOP | Dilution of precision (a measure of accuracy) |
Barra Core Additional Debug IO Mappings
