1 OpenCPN Garmin Radar Plugin Hardware Interface The Garmin Radar PlugIn for OpenCPN requires a specific hardware interface in order to allow the OpenCPN application to access the Ethernet data captured and broadcast by the radar scanner. There are three interconnect scenarios possible, depending upon whether the installation includes an existing Garmin chartplotter, and the operational mode desired. Interface Type 0: OpenCPN Slave Mode, using existing Garmin chartplotter. This is the simplest interface option. In this scenario, the installation includes an existing Garmin chartplotter interfaced to the radar scanner. The OpenCPN computer is connected by means of an Ethernet patch cable to a free port on the rear face of the chartplotter. Operationally, the chartplotter and OpenCPN computer share access to the radar scanner data. However, the chartplotter is the master in this case, and the OpenCPN computer is the slave. All control of range, gain, etc is done by the chartplotter. The OpenCPN computer simply captures the Ethernet scanner data is it appears, and displays the scan data appropriately scaled to the viewport shown on the OpenCPN computer. As might be expected, overall OpenCPN system performance and screen display quality will be suboptimal in this case. Interface Type 1: OpenCPN Master Mode, using existing Garmin chartplotter. In this scenario, the installation includes an existing Garmin chartplotter interfaced to the radar scanner. It is desired that the chartplotter and OpenCPN computer may have shared access to and control of the radar scanner. This mode will provide improved display resolution and performance, as the OpenCPN computer may directly control the radar scanner as required. Unfortunately, the chartplotter does not echo scanner control commands appearing on its auxiliary Ethernet ports out to the scanner itself. Thus, while there may be free Ethernet ports available on the chartplotter, it is not sufficient to simply attach the OpenCPN host computer to one of these free ports if scanner control by the OpenCPN computer is desired. What is instead required is the addition of a simple Ethernet hub between the chartplotter and the radar scanner so that the OpenCPN computer may directly control the scanner as necessary, as well as capture the scanner data stream for display. An additional complication exists. The radar scanner takes advantage of an unused pin (Pin 5) on the Ethernet cabling to manage its low power sleep mode. This functionality is provided by dedicated wiring in the Ethernet connectors on the chartplotter, and controlled by the chartplotter firmware. Unfortunately, it is not common for Ethernet hubs to pass through the required dedicated wiring pins on the cable, As a result, in an OpenCPN shared scanner environment, we must duplicate this power control wiring externally. Finally, we may additionally wish to implement a physical switch in order to control the radar scanner power independently from the chartplotter. A suggested wiring layout for the OpenCPN Interface Type 1 is shown here.
3 Interface Type 2: OpenCPN Master Mode, no chartplotter. In this scenario, the installation consists only of a Garmin radar scanner and an OpenCPN computer. It is desired that the OpenCPN computer may realize full and independent control of and access to the radar scanner data. As in the Type 1 interface, an external mechanical switch is required in order to control the power cycling to the scanner. A suggested wiring layout for the OpenCPN Interface Type 2 is shown here.
4 OpenCPN Interface Notes: 1. A convenient method to access the Ethernet radar scanner power control pin (Pin5) is to use a Female Female Ethernet adapter plug. A readily available commercial adapter is recommended, such as the Amphenol MRJ adapter. This particular component contains a small PC board which allows easy access to the individual Ethernet cable pins for bypass jumper and switch attachment. Direct link: detail/en/mrj /MRJ ND/ ?cur=USD
5 OpenCPN Garmin Radar Plugin Network Interface The OpenCPN Garmin Radar Plugin communicates with the radar scanner by means of standard Ethernet protocols. There are two protocols of interest; a) Control packets sent from the OpenCPN computer (or attached chartplotter) to the scanner are transmitted to a specific fixed scanner address (IP) and port using UDP Datagram protocol, and b) periodic radar scan data and status reports from the radar scanner are transmitted system wide by means of UDP Multicasting. This split of protocols is critical to the OpenCPN PlugIn, as it allow sharing of the radar scanner captured data stream. To enable this interface to the radar scanner, the OpenCPN computer must be appropriately configured for the operational mode desired. For operation in Slave mode, there is generally no special configuration required. Linux systems must have their Ethernet port configured for MULTICAST reception, usually enabled by default. Windows systems also enable Multicast reception by default. If you happen to be running Windows as a guest under VirtualBox, you will need to enable Bridged Networking in the VirtualBox setting dialog for this VM. For operation of the PlugIn in Master mode, additional configuration is required. The general idea is to configure an Ethernet port on the OpenCPN computer with an IP address belonging to the group in which the radar scanner listens and resides. This group address is hardwired into the radar scanner, and is the private (non routable) address range /24. Formally, we may choose any specific IP address within this group for the OpenCPN computer, other than the address of the scanner or the chartplotter. Practically, the OpenCPN Radar Plugin assumes that the IP address will be set to /24. Note that there is typically only one physical Ethernet port on the OpenCPN computer, and for most users that port is configured by the host operating system according to its needs. What we will be doing is adding another Ethernet access port in software (also known as an alias port ), to work in parallel with the existing port(s). For linux computers, a command line to create and enable another port is: (assuming your base Ethernet card is called eth1) $sudo ifconfig eth1: netmask up Of course, you may not want to enter this command every time you power up your computer. It is possible to edit the linux system configuration files in order to make this port creation persistent. For example, in Ubuntu you may modify /etc/network/interfaces as follows: auto eth1:1 iface eth1:1 inet static name Garmin special address netmask network broadcast gateway ifup eth1:1 Other linux systems will have similar capabilities.
6 In Windows, it is also possible to setup alias IP addresses. For example, in Windows XP you may select Network Adapter >Properties >TCP/IP > Properties >Advanced Here you may enter any additional IP addresses (aliases) as required. For the OpenCPN Radar Plugin, setup an IP of with a subnetmask of Note that on Windows, alias IP addresses may only be set if all static IP addresses are enabled, and DHCP auto configuration is not used. This requirement is not expected to be a limitation for shipboard computers. Of course, if the OpenCPN computer has no other pre existing Ethernet connections, it is sufficient to simply set the computer's main IP address statically to /24.
ISDNLink INET-800 ISDN Router User s Guide FCC Statement: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful
Release Version 3 The 2X Software Server Based Computing Guide Information in this document is subject to change without notice. Companies, names, and data used in examples herein are fictitious unless
Barracuda Load Balancer Administrator s Guide Version 2.3 Barracuda Networks Inc. 3175 S. Winchester Blvd. Campbell, CA 95008 http://www.barracuda.com Copyright Notice Copyright 2004-2008, Barracuda Networks
Nokia Siemens Networks CPEi-lte 7212 User Manual Contents Chapter 1: CPEi-lte 7212 User Guide Overview... 1-1 Powerful Features in a Single Unit... 1-2 Front of the CPEi-lte 7212... 1-2 Back of the CPEi-lte
IP-COM-M IP-COMi-M IP-COM-M PoE IP-COMi-M PoE RS-232 RS-232/422/485 RS-232, Power over Ethernet RS-232/422/485, Power over Ethernet Edition: September 2012 The computer programs provided with the hardware
VS NetCom Serial Device Server Lite Series User Manual NetCom 111, 113, 211, 411, 413, 811, 813 and 811RM, 813RM 1. TABLES 1.1. TABLE OF CONTENTS 1. TABLES...1 1.1. TABLE OF CONTENTS... 1 1.2. TABLE OF
IP Intercom Best Installation Practices Table of Contents Abstract... 1 Overview: Designed for Simplicity...2 IP Intercom Hardware Stations...2 IP Intercom HelpDesk Software...3 System Requirements...5
MODEL ATC-2004 TCP/IP TO RS-232/422/485 CONVERTER User s Manual 1.1 Introduction The ATC-2004 is a 4 Port RS232/RS485 to TCP/IP converter integrated with a robust system and network management features
Discover the Power of Mediatrix 000 Series Installation Warning: In the following installation procedures, do not disconnect the Mediatrix 000 Series while the LEDs are flashing. Thank you for choosing
16-Channel VoIP Gateway Card Getting Started Model No. KX-TDA0490 Thank you for purchasing a Panasonic 16-Channel VoIP Gateway Card. Please read this manual carefully before using this product and save
Appliance Administration Manual v6.21 This document covers all required administration information for Loadbalancer.org appliances Copyright 2014 Loadbalancer.org, Inc. Table of Contents Section A Introduction...7
ii Copyright 2006 Comcast Communications, Inc. All Rights Reserved. Comcast is a registered trademark of Comcast Corporation. Comcast Business IP Gateway is a trademark of Comcast Corporation. The Comcast
22Mbps Wireless Access Point / Bridge WAP-1966 User s Manual Copyright Copyright 2003 by PLANET Technology Corp. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed,
ADMINISTRATION GUIDE Cisco Small Business WAP4410N Wireless-N Access Point with Power Over Ethernet Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the
Red Hat Enterprise Linux 7 Load Balancer Administration Load Balancer Add-on for Red Hat Enterprise Linux Red Hat Engineering Content Services Red Hat Enterprise Linux 7 Load Balancer Administration Load
Acronis Backup & Recovery 11.5 Update 2 Installation Guide Applies to the following editions: Advanced Server Server for Windows Virtual Edition Server for Linux Advanced Server SBS Edition Workstation
Vodafone R101 Table of Contents Welcome...3 1. Getting Started Initial Connection and Security Settings... 4 1.1 Overview... 5 System Requirements... 5 Device overview... 5 Sharing Dock and USB Stick LEDs...
Broadband Router ESG-103 User s Guide FCC Warning This equipment has been tested and found to comply with the limits for Class A & Class B digital device, pursuant to Part 15 of the FCC rules. These limits
Bridgewalling - Using Netfilter in Bridge Mode Ralf Spenneberg, email@example.com Revision : 1.5 Abstract Firewalling using packet filters is usually performed by a router. The packet filtering software
Data Bulletin 1210DB0002R3/05 03/2005 LaVergne, TN, USA Communications Wiring for POWERLINK G3 Systems Class 1210 Retain for future use. ABOUT THIS BULLETIN This data bulletin describes the proper wiring
Copyright 2007 Pirelli Broadband Solutions S.p.A. All rights reserved. This document contains Pirelli proprietary and confidential information. No part of this document may be copied, reprinted or reproduced
Easy-to-use VoIP telephone VoIP OnSIP VoIP Start Kit User s manual Allwin Tech.Co.,LTD 2007 All rights reserved. Quick guide to the manual Thank you for purchasing AllWin Tech s VoIP Telephone Start Kit.