Default I/O Mappings [G120]
Written by Matthew Clark-Massera
Updated at July 7th, 2023
Here are the Default I/O Mappings for Digital Matter's G120 tracker. You can change some of these mappings on OEM server - we do not recommend changing these unless you know what you are doing. Additionally, some firmware features provide their 'result' as a Digital Input flag - i.e. Idling flag. It is important when configuring these inputs to avoid clashing with inputs already mapped.
These mapping can be very handy to identify and debug issues.
For example, if the device is connecting to the server/platform intermittently, this maybe an issue with coverage which can be confirmed by analyzing/plotting Analogue 4 (Cellular Signal Strength). Another example of an issue that we see often is trips not being detected/initialized properly - this maybe an issue with the ignition wiring - by looking at Digital 0 would help troubleshoot such issues.
Analogue Mappings
| Analogue Mapping | Description |
|---|---|
| 1 | Battery Voltage |
| 2 | External Voltage |
| 3 | Temperature |
| 4 | Cellular Signal Strength |
| 5 | Analogue Input 1 |
Digital Mappings
| Digital Mapping | Description |
|---|---|
| 0 | Ignition |
| 1 | Input 1 |
| 2 | Input 2 |
| 3 | Input 3 |
| 4 | Input 4 |
| 5 | Input 5 |
| 6 | Input 6 |
| 7 | GPS Interference |
| 8 | GPS Jamming |
Status Flags
All DM 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 |
| 25 | Internal Battery 'Good' |
| 26 | External Battery 'Good' |
| 27 | Connected to Server |
| 28 | Charging |