GR4 Firmware 4.14.011 Release

The latest version of the GRouter4 firmware, version 4.14.011, is now released. Download the Ethernet router firmware or the Wifi router firmware.

Summary

  • Added reset to defaults for web user, password, and port with the “Service App” button on bootup.
  • Changed the reset IP address/port to defaults to be only the “Service Router” button on bootup.
  • Holding both “Service Router” and “Service App” buttons on bootup resets both the IP address/port and the web user/password/port.

Recommendations

Install this update if desire the new functionality for resetting web user/password/port to defaults.

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Adept Systems Website Makeover

You may have noticed that our website is sporting a new look this week!

The alternative logo now takes center stage on the site for a cleaner look. The colors have been updated for a fresh feeling. And the navigation has changed a bit. Our product section no longer goes directly to the online ordering catalog. Instead, we are adding more detailed product information to make the selection process simple.

If you have any questions or suggestions about the site, feel free to shoot us an email!

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3. Conclusion

This entry is part 10 of 11 in the series Lon over IP (709.1/852)

As this article has outlined, the open 852 standard protocol provides many beneficial features for tunneling CN protocols over IP. Because tunneling 709.1 over IP-852 is supported by multiple choices for commercially available routers, the LON systems integrator has the capability to leverage building IT infrastructure much more conveniently and potentially more cost effectively than other BAS CN protocols. [click to continue…]

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2.4 CN over IP Bridging

This entry is part 9 of 11 in the series Lon over IP (709.1/852)

Another difficult integration problem is for legacy LON network management devices that do not support LON routers. This prevents connecting remote LON channels using CN/IP routers since there is no way to configure the router. Another application is where the remote CN channels want to share the same subnet, have low traffic and it is advantageous to have the quickest and easiest setup possible. There are two solutions to the former problem. One solution is to use a manual mode CN/IP router that supports manual configuration of the router as a repeater. The other solution which solves both the former and the latter problems is to use to bridge the CN networks over IP. That is use 852 as a CN Bridge over IP. This provides a totally transparent way to  connect remote CN channels over IP. Since a bridge operates at the physical layer there is nothing to configure on the CN sides. The IP side can be simply configured using the 852 manual mode. Used this way all the CN traffic is automatically forwarded or “flooded” to all the other 852 devices. This has the drawback that it is not scalable to large installations with lots of 852 devices but for applications where only a handful of CN channels need to bridged, bandwidth is not a problem. The Adept GR4 router also provides a “Flood” mode or CN over IP bridge mode.

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2.3 852 to 852 Bridging Router

This entry is part 8 of 11 in the series Lon over IP (709.1/852)

Because 852 is a full featured tunneling protocol, it can be repurposed to solve some uncommonly difficult integration problems. The 852 protocol is not limited merely for routing from a CN channel over IP to another CN channel. But can be used to build multi-tier backbones on IP with routers that route from one IP-852 channel to another IP-852 channel. This can be used to support backbones with more than the maximum number of 852 devices on a single 852 channel. The maximum number of 852 devices on a channel is 256 but practical bandwidth limitations of the individual devices means the practical limit is much lower. The block diagram of an 852 to 852 bridging router is shown below. [click to continue…]

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2.2 IP LAN for high speed CN backbones

This entry is part 7 of 11 in the series Lon over IP (709.1/852)

Since the IP Ethernet LAN channels such 100/1000 Base-T, can support much higher traffic speeds than CN channels, there are well suited as a backbone for large CN installations. This also makes it easy to attach monitoring and management tools. They just need an 852 interface.A n example is show in the figure below. [click to continue…]

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2.1 Multi-site building automation networks over an IP WAN

This entry is part 6 of 11 in the series Lon over IP (709.1/852)

Once of the complications when tunneling CN protocols over an IP WAN is that there is no guarantee that packets won’t take more than one router through multiple IP switches and routers endemic to IP WANS. When this happens packets can get out of order. This can be problematic for an automation network depending on the type of messages being sent. 852 provides a solution for this problem by sequentially numbering CNData packets between 852 devices. This way a n 852 router can detect and reorder CNData packets before forwarding them onto the CN channel. The escrow time used to hold out of order packets is tunable for the WAN delays. Stale packet detection also helps in the rare case that a packet is delayed but not out of order. In addition, because 852 provides channel management of virtual channels, one can mix and match devices from different IP subnets all on the same channel. This makes it convenient to integrate devices from remote locations in multi-building or multi-site connection of automation networks. IP having remote WAN support also means that one can do remote protocol analysis of a CN channel. This has become a common feature for CN/IP routers. [click to continue…]

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2. Applications of the CN/IP Routers

This entry is part 5 of 11 in the series Lon over IP (709.1/852)

There are two primary applications enabled by 852 CN/IP routers. These are remote connection s of multi-site or multi-building CN networks over a WAN and using an IP network LAN as a high speed backbone for a CN network.

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1.5 Configuration

This entry is part 3 of 11 in the series Lon over IP (709.1/852)

852 management packets provide both device parameters and channel parameters. Device parameters include information such as: IP address, IP port, Name, and Address of configuration server. A channel is a logical grouping of 852 devices that all can send information to each other. The lines of communication are open in both directions and to all members—a complete mesh of connections. [click to continue…]

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1.4 852 Protocol Packets

This entry is part 11 of 11 in the series Lon over IP (709.1/852)

Two types of packets are used by the 852 protocol. These are CN Data packets and 852 Channel Management packets. Both packets use a common packet header. The payload of a CN Data packet is the 709.1 LPDU (Link Layer Protocol Data Unit) (See diagram below). The payload of a Channel Management packet is configuration information for the 852 devices. There is some important terminology needed to understand how to deploy an 852 based system which we cover in the next section. [click to continue…]

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