Nme3Pro is the most advanced multiplexer and marine protocol gateway developed by Vela-Navega. The device supports N2K, SeaTalk1 and NMEA 0183 communications, allowing bidirectional data conversion between any two of these standards. In addition to protocol conversion, the gateway provides advanced multiplexing, filtering and routing functions. Data received from wired ports, WiFi and USB can be filtered if required and redistributed simultaneously to multiple outputs and applications. The integrated WiFi interface supports UDP and TCP communications for wireless access from smartphones, tablets and computers. Firmware updates can also be performed wirelessly. Simulation and Debug modes allow monitoring, analysis and generation of marine data traffic during installation and testing.
ELECTRICAL CHARACTERISTICS:
Microcontroller: ESP32-S3 dual core, 240 MHz
Power Supply: 9V to 16V DC through N2K or SeaTalk1 connections, or 5V through USB-C. Use a 1A fuse if connecting directly to a battery. Internal power regulation automatically combines available sources. Only one power source is required.
Power Consumption: Typically less than 100mA
NMEA 0183 Input Ports: P1, P2 and P3 - optically isolated up to 115200 baud
NMEA 0183 Output Port: P4 - RS-422 compatible (galvanically isolated)
N2K Port: Fully bidirectional
SeaTalk1 Port: Fully bidirectional
Filtering and Routing: NMEA 0183 sentences, N2K PGNs and SeaTalk1 datagrams
WiFi Protocols: UDP (1 port) and TCP (2 ports)
USB-C Port: NMEA 0183 routing and diagnostics
Firmware Update: Over-the-Air (OTA), no cables required
Other Features: Simulation and Debug modes. Configuration through integrated web interface in 6 languages.
INSTALLATION:
Before installation, the gateway can be powered through the USB-C connector to become familiar with its operation and configuration interface. The gateway uses detachable screw terminal connectors for the N2K, SeaTalk1 and NMEA 0183 ports. Before inserting a wire, fully loosen the corresponding screw so that the internal clamp moves down. Insert the stripped wire completely before tightening the screw. The SeaTalk1 connector terminals are labelled 12V, DATA and GND. The N2K connector terminals are labelled 12V, CAN-H, CAN-L and GND. The NMEA 0183 inputs use A1/B1, A2/B2 and A3/B3, while the output uses A4/B4. Check all connections carefully before powering the system. N2K cable colours are not always standard, so wires should always be identified by their function or pinout. The complete manual provides additional connection details and illustrations.
CONFIGURATION:
The gateway is fully configurable through its integrated web interface. When powered for the first time, the device automatically creates a WiFi network named NME3-PRO. If necessary, disable mobile data and connect to this network using the default password 12345678. After connecting, enter the address 192.168.4.1 in your browser's address bar to access the configuration webpage. From this interface, you can configure the communication ports, filtering, routing, WiFi connections, protocol conversions and operating modes.
SUPPORT:
The complete Nme3Pro User Manual, including detailed installation, configuration and protocol-conversion information, is available here. Firmware updates and technical assistance are also available. For questions, installation help and information about firmware releases, please visit the forum dedicated to the Nme3Pro gateway.