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Astra Telematics - AT242 Protocol

This page provides the public protocol context for using the Astra Telematics AT242 with Plaspy. It focuses on how the tracker communicates with Plaspy in general, the connection settings required to reach Plaspy servers, and practical compatibility considerations. The guidance here is intended for system integrators, fleet administrators, and technical users setting up or validating AT242 connectivity with Plaspy.

Plaspy uses shared connection settings for supported devices and automatically detects the tracker protocol when a properly configured device reports to the Plaspy endpoint. Exact on‑device behaviour can vary by firmware version, hardware revision, and manufacturer implementation, so the information here is high level and intended to complement the AT242 product documentation and Astra Telematics resources.

Protocol Overview​

The communication protocol used by the AT242 governs how the tracker sends position, telemetry, I/O events, and CANBus data to a backend platform such as Plaspy. In practice, the protocol enables the device to identify itself to the server, report GNSS fixes and sensor telemetry, and deliver event notifications that Plaspy can map into location, alerting, and reporting features.

  • Transmits GNSS position and timestamped telemetry for live location and historical tracks.
  • Delivers digital input and output events, accelerometer and tamper alerts, and driver ID information for event driven workflows.
  • Sends CANBus and ADC telemetry that Plaspy ingests to show vehicle status and diagnostic values.
  • Carries device identification and status fields so Plaspy can associate incoming data with the correct asset.
  • Operates over standard network transports so the same endpoint and port can be used for many device types.

How Plaspy Detects the Protocol​

Plaspy listens on a shared endpoint and port and performs automatic protocol detection for incoming connections from compatible trackers. When an AT242 is configured to report to Plaspy, the platform recognizes the device reports and maps the incoming data to the appropriate device record without manual protocol selection in most cases.

  • Plaspy exposes a common ingestion endpoint at d.plaspy.com for device reporting.
  • The Plaspy server reachable at 54.85.159.138 accepts tracker connections on port 8888.
  • All devices supported by Plaspy use the same port, simplifying provisioning and network rules.
  • Plaspy can accept data from devices using either the domain name or the server IP as the target address.
  • Typically you do not need to choose a device protocol inside Plaspy if the tracker is correctly pointed at the Plaspy endpoint.

Transport and Connection Context​

Connection transport and addressing are part of the public configuration context for AT242 deployments. The device may be configured to use either UDP or TCP depending on the model variant, carrier configuration, and installer preference. The important public facts are the Plaspy endpoint and the uniform port used for all supported trackers.

  • Devices may be configured to report to d.plaspy.com as the server DNS name.
  • Devices may alternatively be pointed directly to the Plaspy server IP 54.85.159.138.
  • The AT242 may use UDP or TCP to send reports to port 8888 based on device settings and network behavior.
  • Plaspy uses the same port 8888 for all supported devices which simplifies firewall and APN rules.
  • Ensure APN and cellular data connectivity are configured so the device can resolve or reach the Plaspy endpoint.

Protocol Compatibility Notes​

  • Firmware variations can change message timing, available fields, and optional telemetry; verify the firmware version during validation.
  • Hardware revisions and regional variants may expose different radio band support or peripheral wiring that affects reporting behavior.
  • Manufacturer configuration menus often allow switching the transport between UDP and TCP; choose the transport that matches your network and carrier needs.
  • Some AT242 features such as optional BLE sensors or accessory inputs may require specific configuration to appear in Plaspy.
  • Confirm that device identity (IMEI or device ID) is correctly associated with the intended Plaspy account or fleet.
  • Always cross check the behavior observed in the field with the official Astra Telematics documentation for the specific model and firmware.

Why Protocol Understanding Matters​

Understanding the tracker communication protocol helps ensure successful setup, predictable operation, and efficient troubleshooting when integrating the AT242 with Plaspy. Knowledge of how the device reports data reduces setup time and helps isolate issues when telemetry does not appear as expected.

  • Ensures correct server address and transport selection so the device can reach Plaspy.
  • Helps interpret which telemetry fields are expected and whether they should appear in Plaspy dashboards.
  • Aids in troubleshooting connectivity and reporting cadence issues by narrowing variables to firmware, transport, or network.
  • Supports planning for edge cases such as power loss, backup battery behavior, and tamper events.
  • Improves coordination with manufacturer support when device behavior differs from expectations.

Why Use Plaspy with This Protocol​

The AT242 pairs rugged hardware and broad I/O with Plaspy’s ingestion and mapping of telemetry to deliver real time location, alerts, and vehicle insights. For organizations that need continuous visibility, tamper detection, driver association, and CANBus telemetry, combining the AT242 with Plaspy provides a practical path from device signals to operational dashboards and automated workflows.

To learn more about how Plaspy handles device integrations and to review platform features, visit https://www.plaspy.com. Protocol support, firmware behavior, and manufacturer device details can change over time, so please verify the latest device specific protocol information and firmware notes with Astra Telematics at https://astratelematics.com/ .

Tracker Communication

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