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Ulbotech - T376 Protocol

This page describes the public protocol context for using the Ulbotech T376 tracker with Plaspy. It explains how the device communicates in general terms, what connection settings are used by Plaspy, and what to consider when integrating the T376 for real time vehicle telemetry, OBDII parameters, and immobilizer control. The content is intended for technical users and integrators who need a clear overview of connectivity and protocol considerations without exposing private implementation details.

Plaspy uses shared connection settings across supported devices and automatically detects the tracker protocol when the device reports to the platform. Exact protocol behavior for the T376 can vary by firmware version, hardware revision, cellular or Wi Fi configuration, and manufacturer implementation choices. For device specific frames, command sets, or firmware variations consult Ulbotech documentation and firmware release notes.

Protocol Overview​

The communication protocol of the T376 governs how the tracker sends location, vehicle telemetry, and event data to a remote server and how the server can issue remote commands such as immobilizer control or firmware update triggers. In practice the protocol enables reliable delivery of position fixes, OBDII parameters, and status events so Plaspy can present live and historical fleet intelligence.

  • Enables the tracker to report GPS GNSS positions and OBDII telemetry to a remote server for mapping and analysis.
  • Carries device identity and status information so Plaspy can associate incoming messages with a specific vehicle.
  • Transports event notifications such as ignition state, accelerometer events, and immobilizer activations.
  • Supports remote device functions such as over the air firmware updates and remote outputs when the device and network permit.
  • Works over standard transport channels so the tracker can use cellular or Wi Fi to maintain connectivity and reduce data cost.

How Plaspy Detects the Protocol​

Plaspy accepts inbound connections on a unified server endpoint and port and applies automatic protocol detection to incoming device traffic. In most deployments the device only needs to be configured to report to the Plaspy endpoint and the platform will identify the compatible device protocol without manual selection by the user.

  • Plaspy server domain is d.plaspy.com and the server IP is 54.85.159.138 for device reporting.
  • The port used by Plaspy for device traffic is 8888 and all devices in Plaspy use the same port.
  • Devices may be configured to send data using either UDP or TCP on port 8888 according to device support and network requirements.
  • If the T376 is pointed to d.plaspy.com or 54.85.159.138 on port 8888 and configured to report, Plaspy will automatically detect the tracker protocol.
  • Typical integration does not require selecting a protocol inside Plaspy when the device is correctly set to report to the Plaspy endpoint.

Transport and Connection Context​

Connection transport and endpoint configuration are primary considerations when integrating the T376 with Plaspy. The T376 supports cellular and Wi Fi links and can be set to report via UDP or TCP depending on the installed firmware and configuration. Ensuring the device points to the correct Plaspy endpoint and port is the core network requirement for reliable data flow.

  • The device may be configured to use UDP or TCP on port 8888 depending on device support and chosen configuration.
  • Devices can point to the Plaspy server domain d.plaspy.com or the server IP 54.85.159.138 as the reporting endpoint.
  • All Plaspy supported devices use the same port number 8888 which simplifies firewall and carrier rules for fleet deployments.
  • Cellular or Wi Fi selection on the T376 can be automatic to balance reporting speed and data cost while maintaining connectivity to Plaspy.
  • Ensure the network allows outbound traffic to port 8888 and that any NAT or carrier grade NAT behavior is tested during deployment.

Protocol Compatibility Notes​

  • Firmware revisions can introduce differences in supported commands, transports, or optional features such as FOTA and Wi Fi reporting.
  • Hardware variants and regional cellular module configurations may affect available bands and connectivity behavior.
  • Manufacturer side settings and default APN behavior can change how the device reaches the Plaspy endpoint, so verify APN configuration when commissioning devices.
  • Transport selection between UDP and TCP may need to match the deployed firmware option on the T376 for consistent reporting.
  • Plaspy automatic protocol detection reduces manual configuration but verifying device identity and initial messages helps confirm correct integration.
  • For the most current and device specific details consult Ulbotech official documentation and firmware release notes.

Why Protocol Understanding Matters​

Understanding how the T376 communicates helps ensure a smooth setup, consistent telemetry flow to Plaspy, and faster troubleshooting when issues arise. A basic grasp of the connection expectations, transport options, and how Plaspy receives data reduces deployment friction and supports long term reliability.

  • Helps ensure correct endpoint and port configuration so devices reliably reach Plaspy.
  • Aids in diagnosing connectivity issues such as blocked ports, incorrect APN, or transport mismatches.
  • Clarifies expectations for telemetry frequency, OBDII parameter availability, and event reporting behavior.
  • Supports planning for FOTA and remote management when coordinating firmware updates and feature rollouts.
  • Reduces deployment time by aligning device settings with Plaspy connection requirements before large scale rollout.

Why Use Plaspy with This Protocol​

Pairing the Ulbotech T376 with Plaspy provides organizations with robust vehicle visibility, OBDII telemetry, and actionable event control through a single platform. The T376’s plug and play OBDII form factor, GNSS accuracy, accelerometer driven events, and integrated immobilizer make it a practical choice for fleet managers who need reliable telemetry and remote control capabilities. Using Plaspy lets you aggregate location, engine parameters, and safety events into dashboards, alerts, and reports for operational oversight.

To learn more about Plaspy visit https://www.plaspy.com. Protocol support, firmware behavior, and device implementation details can change over time so confirm the latest device specific information on the manufacturer site http://www.ulbotech.com/ before large scale deployments.

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