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Navtelekom - ASN SIGNAL S-4752 + SIM AO "GLONASS" Protocol

This page describes the public protocol context for using the Navtelekom ASN SIGNAL S-4752 with a preinstalled SIM from AO "GLONASS" when integrating the device with Plaspy. It focuses on how the device communicates with Plaspy in general terms, what connection settings are used, and practical compatibility considerations based on the device description and Plaspy platform behavior.

Plaspy uses shared connection settings across supported devices and automatically detects the tracker protocol when a properly configured device reports to Plaspy. Exact protocol behavior and message timing can vary by device firmware, hardware revision, and manufacturer implementation, so this page emphasizes high level communication context rather than firmware specific internals.

Protocol Overview​

The tracker communication protocol is the set of rules and message behaviors that enable the ASN SIGNAL S-4752 to report GNSS positions, telemetry from CAN and serial interfaces, and event data to a remote server like Plaspy. At a high level the protocol governs session transport, device identification, reporting cadence, and event delivery so the platform can consume and display meaningful location and vehicle data.

  • Enables periodic and event driven delivery of GNSS position and vehicle telemetry to a remote server
  • Carries identification and status information so Plaspy can associate reports with the correct device record
  • Conveys vehicle bus and sensor data from CAN, RS232, RS485 and analog/digital inputs for telemetry and alarms
  • Supports local buffering to microSD to prevent data loss during temporary cellular outages
  • Integrates with in unit logic such as complex event rules and MODBUS to trigger reporting and telemetry messages

How Plaspy Detects the Protocol​

Plaspy receives device traffic on a shared endpoint and uses automated detection to determine the tracker protocol so most deployments do not require manual protocol selection inside the platform. If the device is configured to send telemetry to the Plaspy endpoint, Plaspy will accept the connection and apply the appropriate protocol handling based on the incoming data pattern.

  • Plaspy server domain is d.plaspy.com and Plaspy server IP is 54.85.159.138
  • The port is 8888 and all devices in Plaspy use the same port for reporting
  • Plaspy automatically detects the tracker protocol from the incoming connection and payload characteristics
  • When the ASN SIGNAL S-4752 is pointed to the Plaspy endpoint, manual protocol selection is usually unnecessary
  • Proper device configuration to report to Plaspy is the common requirement for automatic detection to work reliably

Transport and Connection Context​

Transport settings determine how the ASN SIGNAL S-4752 establishes a network session to Plaspy and are a key part of successful integration. The unit supports cellular data transport and can be configured to use either UDP or TCP depending on device capabilities and operator settings.

  • The device may be configured using UDP or TCP on port 8888 depending on device support and preferred transport
  • Devices can point to the Plaspy domain d.plaspy.com or to the Plaspy server IP 54.85.159.138 for direct routing
  • Plaspy uses the same port 8888 for all supported devices which simplifies device configuration and provisioning
  • Choosing UDP versus TCP can affect delivery semantics and retransmission behavior but is a device side setting
  • Ensure APN and SIM settings on the preinstalled AO "GLONASS" SIM are correct for cellular connectivity to the Plaspy endpoint

Protocol Compatibility Notes​

  • Firmware versions may change message timing, enabled features, or optional fields used by the tracker
  • Hardware revisions and optional interface modules can affect which telemetry channels are available for reporting
  • Manufacturer configuration and preinstalled SIM settings can include default server endpoints that must be updated to Plaspy where required
  • Transport selection between UDP and TCP is an important compatibility factor and must match what the device supports
  • Validate device behavior after firmware updates since protocol nuances can evolve with new releases
  • When in doubt, consult the manufacturer documentation and configuration tools for device specific protocol guidance

Why Protocol Understanding Matters​

Understanding the tracker communication protocol helps fleet administrators and integrators configure devices correctly, troubleshoot connectivity, and ensure reliable long term reporting to Plaspy. Clear knowledge of the protocol and transport context reduces onboarding time and prevents common misconfigurations that interrupt telemetry.

  • Speeds initial setup by clarifying which server address and transport the device must use
  • Helps diagnose connection problems such as unreachable endpoints, APN errors, or transport mismatches
  • Informs expectations for reporting cadence, event delivery timing, and local buffering behavior
  • Aids in planning firmware upgrades and validating continued compatibility with Plaspy
  • Ensures vehicle telemetry channels are correctly mapped to platform data fields for accurate monitoring

Why Use Plaspy with This Protocol​

Using the ASN SIGNAL S-4752 with Plaspy provides a practical path to collect GLONASS/GPS positions, vehicle bus telemetry, and event data from a certified ERA GLONASS capable tracker. Plaspy's shared endpoint and automatic protocol detection simplify large scale rollouts and reduce per device configuration effort, making it suitable for fleet operations that require rapid onboarding and regulatory reporting.

To learn more about Plaspy and how it can receive data from the ASN SIGNAL S-4752, visit https://www.plaspy.com. For the most current device specific protocol details, firmware notes, and regional certification information verify the manufacturer documentation at https://www.navtelecom.ru/ since protocol support and firmware behavior can change over time.

Tracker Communication

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