> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ctechnology.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Astra Telematics AT241/242

> Documentation and installation instructions for Astra Telematics AT241/242.

The Astra Telematics AT241/242 is a compact and cost-effective telematics device suitable for various vehicle types, including cars, motorcycles, and boats.
It offers essential features such as GPS tracking, cellular connectivity, and OBD2 support.

## Data sheet

The following excerpt is the most relevant information for marine and on-road applications from the [official data sheet](https://astratelematics.com/wp-content/uploads/2020/12/AT241-data-sheet.pdf).
Please always refer to the official documentation for the most accurate and up-to-date information.

| Feature                                | Specification                                                        |
| -------------------------------------- | -------------------------------------------------------------------- |
| Mobile Network Communications          | LTE-Cat 1 (4G) - others possible                                     |
| Maximum Operating Voltage              | 65.0V                                                                |
| Antennas                               | Internal                                                             |
| BLE (Bluetooth) Option                 | Yes                                                                  |
| SIM Card Format                        | Micro                                                                |
| Accelerometer / tamper sensor          | Yes                                                                  |
| Battery Capacity (internal)            | 510mAh (6 days low power mode, 24h reporting)                        |
| Battery Life (LP mode, 24hr reporting) | 6 days                                                               |
| Ingress Protection                     | IP67                                                                 |
| Digital Ins / Outs                     | 6 / 5                                                                |
| ADC Inputs                             | 2                                                                    |
| CAN bus                                | Yes ([NMEA2000 support](#nmea-2000-support-scope), custom protocols) |

## Installation instructions

Please download the printable [installation manual](https://drive.google.com/file/d/1oLkxR1L4xYe1_8vz3mJgud-0nFMd8S7T/view?usp=drive_link) for detailed installation instructions.

## NMEA 2000 support scope

> **Disclaimer**\
> Our NMEA 2000 integration **natively supports only the items listed below**. Any additional parameters, multi-engine/tank setups, or proprietary PGNs/features must be reviewed and agreed separately (feasibility, timeline).

| Category          | Property                         |
| ----------------- | -------------------------------- |
| Battery           | State of Charge % (DC type 0)    |
|                   | State of Health % (DC type 0)    |
|                   | Battery Capacity (Ah, DC type 0) |
|                   | Charger Enable / Disable         |
|                   | Time to Empty                    |
|                   | Distance to Empty                |
| Fuel & Trip       | Fuel Level % (type 0)            |
|                   | Fuel Rate                        |
|                   | Trip Fuel Used                   |
|                   | Trip Run Time                    |
| Engine            | Oil Level % (type 4)             |
|                   | Engine Oil Pressure              |
|                   | Engine Oil Temperature           |
|                   | Engine Temperature               |
|                   | Alternator Voltage               |
|                   | Engine Coolant Pressure          |
|                   | Fuel Pressure                    |
|                   | Percent Engine Load              |
|                   | Percent Engine Torque            |
|                   | Total Engine Hours               |
|                   | Engine Discrete Status 1         |
|                   | Engine Discrete Status 2         |
| Environment/Depth | Water Depth at Transducer        |
|                   | Water Depth Transducer Offset    |
|                   | Wind Speed                       |
|                   | Air Temperature                  |

**Notes**

* Applies to **one engine and one tank**.
* Compatibility depends on the vessel network publishing these PGNs per NMEA 2000 conventions.
* Extensions (e.g., multiple engines/tanks, additional sensors, custom/proprietary PGNs) require a separate technical discussion.

*“NMEA 2000” is a trademark of the National Marine Electronics Association (NMEA).*