EElink - TK419‑3 Protocol
This page covers the public protocol context for using the EElink TK419‑3 tracker with Plaspy. It explains, at a high level, how the device communicates with the Plaspy platform and what aspects of the tracker reporting are relevant when integrating the device into a fleet management workflow.
The TK419‑3 is a compact vehicle tracker with LTE Cat 1 and GSM fallback, multi constellation GNSS, ACC input, optional relay control, and on device telemetry that Plaspy ingests for live tracking and alerts. Plaspy uses shared connection settings across supported devices and automatically detects the tracker protocol, while exact protocol behavior can vary with firmware versions, hardware revisions, and manufacturer implementation details. Always confirm device specific behaviors against manufacturer documentation when precise packet or command details are required.
Protocol Overview
The protocol used by the TK419‑3 determines how the tracker reports GNSS fixes, I/O states, alarms, and telemetry to Plaspy and how remote configuration and commands are exchanged when supported. At a high level the protocol enables reliable delivery of position and event data so Plaspy can normalize and present it in the dashboard.
- Enables the device to identify itself and deliver GNSS position updates and timestamps to Plaspy.
- Carries digital and analog I/O states such as ACC ignition, SOS triggers, and external sensor readings.
- Transports event driven alerts like geofence entry/exit, overspeed, collision, and power loss notifications.
- Supports remote configuration and command acknowledgements where the device firmware implements over the air parameter updates.
- Provides the means for Plaspy to normalize incoming data for mapping, history, and telemetry reporting.
How Plaspy Detects the Protocol
Plaspy receives incoming connections on a shared, well known endpoint and uses information from those connections to determine which tracker protocol a device is using. In most cases a properly configured TK419‑3 reporting to the Plaspy endpoint will be automatically detected without manual protocol selection inside Plaspy.
- Plaspy listens on the shared domain d.plaspy.com for device connections.
- The platform also accepts connections directed to the public server address 54.85.159.138.
- Plaspy uses a single common port for device reporting which simplifies device side configuration.
- Devices may be configured to connect via UDP or TCP on port 8888 to reach Plaspy.
- When the TK419‑3 is configured to report to the Plaspy endpoint, Plaspy automatically detects the tracker protocol and maps incoming messages to the device record.
Transport and Connection Context
Connection and transport settings are among the most common items to verify when integrating a tracker. The TK419‑3 can use either UDP or TCP depending on the device configuration and firmware, and it should be pointed at the Plaspy server endpoint for successful data delivery.
- The TK419‑3 may be configured to use either UDP or TCP on port 8888.
- Devices can be pointed to the domain d.plaspy.com or directly to 54.85.159.138 for reporting.
- Plaspy uses the same port for all supported devices to simplify provisioning and network rules.
- Ensure network firewalls and carriers allow outbound traffic to the Plaspy domain and port.
- Verify device APN and GPRS/LTE settings are correct so the tracker can establish a data session to the cloud.
Protocol Compatibility Notes
- Firmware versions can change the exact message set and behavior; two units with different firmware may behave differently.
- Hardware revisions and optional accessory configurations (relay, RS232 sensors, GPIO expansions) can affect which telemetry fields are present.
- Carrier or regional differences in cellular connectivity can impact transport reliability and failover behavior.
- Choosing UDP versus TCP may affect reliability and retransmission behavior depending on network conditions.
- Always test a device on a live Plaspy account with representative network conditions before large scale deployment.
- Consult the manufacturer for firmware release notes and configuration guides when troubleshooting protocol level differences.
Why Protocol Understanding Matters
Understanding how the TK419‑3 communicates with Plaspy helps ensure reliable reporting, correct alarm handling, and faster troubleshooting when issues arise. Knowing the role of transport, firmware, and device configuration makes deployments smoother and reduces time to resolution.
- Simplifies initial device provisioning and correct APN or server settings.
- Helps troubleshoot missing locations, delayed telemetry, or incorrect I/O reporting.
- Informs decisions about transport selection and firewall rules for the deployment environment.
- Improves confidence when enabling remote commands such as relay control or parameter updates.
- Prevents surprises from firmware changes by prompting validation of behavior after updates.
Why Use Plaspy with This Protocol
Using the EElink TK419‑3 with Plaspy gives organizations a compact, vehicle centric tracker integrated into a platform designed for fleet visibility, alerts, and operational workflows. Plaspy ingests position fixes, I/O states, and alarm events from the TK419‑3 and presents them as live map updates, telemetry streams, and configurable notifications that support dispatch, security, and analytics.
To learn more about how TK419‑3 devices operate with Plaspy and how to configure your fleet for reliable reporting, visit the Plaspy website at https://www.plaspy.com. For the most current device specific protocol details, firmware notes, and configuration instructions consult the EElink manufacturer site at https://www.eelink.com.cn/ since protocol support and firmware behavior can change over time and should be verified against official documentation.
Tracker Communication
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