Astra Telematics - AT211 Protocol
This page summarizes the public protocol context for using the Astra Telematics AT211 tracker with Plaspy. It focuses on how the device communicates with the Plaspy platform in non sensitive, implementation independent terms. The AT211 is a rugged IP67 tracker designed for plant and machinery and reports GNSS, movement, and I/O state to remote servers via cellular networks including GSM GPRS and low power wide area networks.
Plaspy uses shared connection settings across supported devices and automatically detects the tracker protocol when data is sent to the platform. Exact protocol behavior, message timing, and available fields can vary by firmware version, hardware revision, and manufacturer configuration, so this page provides practical context while encouraging verification of firmware and vendor documentation for device specific details.
Protocol Overview
The AT211 communication protocol defines how the device packages telemetry, location fixes, sensor readings, and event notifications for transport to a backend server. In practice this means the tracker transmits GNSS fixes, accelerometer and movement events, input and output states, battery and power status, and optional BLE related events to Plaspy so those data points become actionable on the platform.
- Enables periodic and event driven delivery of GNSS location data and timestamps to Plaspy.
- Communicates accelerometer derived movement and impact events for tow and alarm scenarios.
- Reports digital input and output status plus basic telemetry such as battery and power state.
- Uses cellular networks for transport and can fall back to low power wide area modes for extended coverage.
- Supports optional BLE sensor events for immobiliser and driver identification when enabled.
How Plaspy Detects the Protocol
Plaspy accepts incoming device traffic on a single shared endpoint and port and performs automatic protocol detection so users generally do not need to select a protocol manually. When an AT211 is configured to report to Plaspy, the platform recognises the device reporting pattern and maps incoming data to the appropriate device record and data model.
- Plaspy’s public server endpoint is d.plaspy.com and also accepts connections to the server IP 54.85.159.138.
- All Plaspy devices use the same port on the platform which is 8888.
- Plaspy automatically detects the tracker protocol so manual protocol selection in the platform is normally unnecessary when the device reports correctly.
- Proper device configuration to point at the Plaspy endpoint is the usual requirement for detection to succeed.
- Automatic detection covers a range of common tracker transports and reporting patterns used by industrial trackers.
Transport and Connection Context
The AT211 can transmit to remote servers over multiple transport types depending on module capabilities and configuration. For Plaspy integration the essential connection details are shared and consistent across supported models, making initial configuration straightforward and minimizing platform-side setup.
- The device may be configured to use UDP or TCP on port 8888 depending on device support and site requirements.
- Devices can be pointed to the Plaspy server by hostname at d.plaspy.com or directly to the server IP 54.85.159.138.
- Plaspy listens on the same port 8888 for all supported trackers which simplifies provisioning and firewall rules.
- Transport selection between UDP and TCP is generally driven by device firmware settings and network reliability considerations.
- Ensure that outbound device traffic to d.plaspy.com or the server IP is permitted on port 8888 from the device network.
Protocol Compatibility Notes
- Firmware versions may add, remove, or change message fields and reporting intervals; validate the device firmware level when troubleshooting.
- Hardware revisions and optional features such as BLE or external GNSS antennas can affect which telemetry elements are available.
- Some operator or module variants may prefer UDP or TCP by default; confirm the transport mode in device configuration.
- Plaspy’s shared port approach reduces configuration complexity but requires correct device endpoint and port settings on the tracker.
- Manufacturer configuration menus, APN settings, and SIM provisioning remain important to ensure the device can reach the Plaspy endpoint.
- Always cross check deployment notes and any regional module limitations against the manufacturer documentation.
Why Protocol Understanding Matters
Understanding the AT211 communication protocol helps administrators set up devices correctly, diagnose reporting issues, and ensure the data Plaspy receives is complete and timely. Awareness of how the tracker reports location, events, and telemetry reduces integration friction and supports robust fleet operations.
- Helps ensure correct device endpoint and transport settings so data reaches Plaspy reliably.
- Eases troubleshooting for missing or delayed reports by clarifying which events the tracker will send.
- Supports configuration of I/O and accelerometer thresholds to align device events with Plaspy alerts.
- Allows teams to validate firmware behavior and feature availability for specific deployment needs.
- Informs decisions about transport choice and SIM APN settings for best network performance.
Why Use Plaspy with This Protocol
Using the Astra AT211 with Plaspy gives organisations a practical way to turn rugged field telemetry into actionable fleet and asset insights. The AT211’s combination of durable hardware, multi network connectivity, and flexible I O makes it well suited for plant, construction, agricultural, and mobile asset monitoring where reliable reporting and anti theft workflows matter.
To learn more about Plaspy and how it supports trackers like the AT211, visit https://www.plaspy.com. Protocol support, firmware behavior, and device implementation details can change over time, so verify the latest device specific protocol and firmware information on the manufacturer site https://astratelematics.com/ for the most current guidance.
Tracker Communication
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