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Which Mesh Technology is Right for You? – Q&A Follow-Up

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Are there tutorials available for XCTU, or user manuals?xbee-zigbee (2)
Yes, there is a complete help system built into the XCTU interface. Visit the Digi YouTube page for video-based tutorials.

Can you program DigiMesh with legacy XCTU?
We recommend customers use the new and improved XCTU. Legacy XCTU may still work with some products, but it is no longer supported or updated for new releases.

Can I use the new XCTU on older versions of Xtend RF Radios?
Yes, but certain features of XCTU may not work with older versions of XTend radios.

Does hardcoding PAN ID and Channel as used in DigiMesh modules have any disadvantage?
Hardcoding the PAN ID does not have any significant disadvantage, but note that some products require the use of multiple channels, but the channel range can be selected and configured as desired.

Digimesh networks are configured by setting the Pan ID and operating channel. This method lends itself to very simple network formation as no association mechanism is involved. Zigbee uses an association process where routers and end devices receive the operating PAN ID and channel upon joining the network. One advantage of this system is that joining can be disabled.

For a network of 400 nodes, with up and down communication, which is preferable, ZigBee or DigiMesh?
Both mesh protocols can work for this network if configured appropriately. DigiMesh is slightly easier to architect simply because there is no need to select different node types.

Can we use your gateway and connect it to our cloud?
Yes, this is an option for most XBee modules.

Can out-of-the-box configuration items be modified via a broadcast or unicast in both ZigBee and DigiMesh?
Yes, ZigBee and DigiMesh nodes can be configured over-the-air.

What’s the range of these 900HP DigiMesh Kit modules?
Range for the XBee-PRO 900HP is up to 9 miles with high-gain antenna. This can be increased by adding additional hops to the network.

We are planning to use ZigBee Mesh network to collect the data from battery powered movable sensors. The sensors will be distributed in two physically apart buildings where there are no wireless connection from one building to another building. Could you please let me know the best way to setup the network, considering moveable sensors will move from one building to another building and should join the network as soon as they enter the range of ZigBee network in another building.
With ZigBee you would need to have some mechanism to instruct the module to leave the current network and attempt to join the other. This could be accomplished with a network watchdog timer that checks for the presence of a coordinator and if none is found will reset and join another network. XBee Zigbee radios also have a feature called join verification that can be set to check for the presence of a coordinator on a power reset and reset its network settings if none is found. Digimesh could accomplish this by setting both networks with the same PAN ID and Channel credentials, then moving from one network to the other would be seemless.

Any DigiMesh Kits including Raspberry pi projects?
We don’t have any Raspberry Pi projects in our current kits. However, there are plenty of RPi project examples on the web.

What comes in the kits that are on the screen?
ZigBee Mesh Kit:

  • 3 – XBee Grove Development Boards
  • 3 – XBee ZigBee Modules w/ PCB antenna
  • 3 – Micro USB cables
  • 2 – XBee stickers

900HP DigiMesh Kit:

  • 3 XBee Grove Development Boards
  • 3 XBee-PRO 900HP Modules for US/Canada
  • 3 Micro-USB Cables
  • 2 XBee Stickers

Do these modules require a Digi concentrator and/or cloud or are they compatible with 3rd party systems?
Digi Gateways can be used with our ZigBee and 900HP DigiMesh modules to connect them to cloud-based applications. ZigBee modules can also be used with 3rd party gateways, but there could be some compatibility issues depending on the implementation of the ZigBee protocol on the 3rd party gateway. Customers that need a gateway to connect their devices to an IP-based system are suggested to use Digi gateways.

When addressing a ZigBee node, is it required to use both the 64-bit address AND the 16-bit ID address?
Frames may be addressed using either the extended(64 bit) or the network address (16 bit). If the extended address form is used, then the network address field should be set to 0xFFFE (unknown). If the network address form is used, then the extended address field should be set to 0xFFFFFFFFFFFFFFFF (unknown). If an invalid 16-bit address is used as a destination address, and the 64-bit address is unknown (0xFFFFFFFFFFFFFFFF), the modem status message will show a delivery status code of 0x21 (network ack failure) and a discovery status of 0x00 (no discovery overhead).

If a non-existent 64-bit address is used as a destination address, and the 16-bit address is unknown (0xFFFE), address discovery will be attempted and the modem status message will show a delivery status code of 0x24 (address not found) and a discovery status code of 0x01 (address discovery was attempted).

What relative humidity or IP rating can the “raw” PCAs operate in?
0-95% humidity

Do you have any office in India which can support us in developing the application, across the table or over the phone?
Digi no longer has an office in India, but support is available through our US offices.

Is there a DigiMesh kit available for Europe (868 or 2.4)?
There is not currently a DigiMesh kit available for 868LP or DigiMesh 2.4 modules.

Does DigiMesh come with a cellular and or satellite gateway?
Yes, available in the ConnectPort X4 and X4H.

Is there a notion of sustained broadcast rate that can be claimed? Like 9600 baud, 19200, etc. What is expected of transmitting node, in terms of backing off?
Each node that transmits the broadcast will also create an entry in a local broadcast transmission table. This entry is used to keep track of each received broadcast packet to ensure the packets are not endlessly transmitted. Each entry persists for 8 seconds. The broadcast transmission table holds 8 entries. This process creates an approximate once per second maximum sustained broadcast rate. System generated broadcast events can also occur so careful testing should be performed to estimate any network’s specific throughput capabilities.

Can XCTU be used remotely?
XCTU can be used to configure locally connected nodes and ‘remote’ nodes connected to your network over-the-air.

What’s the difference between the 900HP modem and the Xtend modem?
They are similar in terms of performance and functionality. The 900HP modem is less expensive, and slightly lower range than the XTend.

Which antenna are recommended to maximize transmission across water?
High-gain directional or omni antennas provide strong performance across water and land. Note that over both water and land, the higher the antenna, the more likely you are to achieve unimpeded line-of-sight range.

What do you mean by complex deployment?
Large mesh networks are considered complex deployments. ZigBee networks can be slightly more complex than DigiMesh, simply because the node types need to be defined for every node on the network and there must be a powered coordinator defined for the network to operate properly.

ZigBee nodes: What if a coordinator stops working?
The coordinator can be a point of failure for a ZigBee network.

Can ZigBee module work like mesh?
Yes, ZigBee modules operate in mesh networks.

DigiMesh why no 433MHz?
Not a strong market opportunity to drive the creation of this product. If you have customers interested in this technology, please let the Product Management team know.

How do the modules differentiate between the line-of-site and a reflected packet?
Multipath signals can create destructive interference when they arrive out of phase with a direct signal at the receiving antenna. This generally results in fading or weakening of the received signal.

Is there a limit on the size of data that can be transmitted? Or a good practice / recommendation to deal with larger datasets?
If using API mode, there is a maximum payload size that can be included with each API frame. This size will vary with different versions of XBee module but can always be queried with the NP command.

With unicast will each node of a network repeat packets or does the mesh network only repeat packets on nodes that it knows are on the path to the final node?
Only modules involved in the routing of the data will retransmit the packet.

Which module you recommend for smart street lighting , and how is the communication traffic managed? Can every lamp on the network talk to each other?
We have intelligent street lighting customers using ZigBee and DigiMesh technology. In both network types, every lamp on the network can communicate with one another. Each technology has pros and cons, it comes down to customer preference.

Two part question:What is the advantage of directed broadcasting (i.e., defining a destination address)? Does this improve communication speeds of data to the ‘host’?
Directed broadcasting does not improve the communication speed of data to the host but it does simplify addressing as it allows you to address data to a specific module. Otherwise you would need an identifier in the payload of your broadcast packet to inform the desired module to reply. It also limits the amount of extraneous data that will be presented to host applications.

My question is why South America (Argentina) is not listed in market for 900HP Digimesh?
900HP DigiMesh modules can be used in Argentina, there are no specific certification requirements for that region.

I already got the zig bee mesh kit a couple weeks ago… I have an xbee shield for arduino, do I need anything else to get started?
Nope, you are ready to go build your own XBee-enabled prototype!

Is there any possibility to compress/decompress data before/aftrer zb/digimesh transmission?
The XBee radios are serial radios. Any binary data can be transmitted via an XBee Radio. A JPEG image is a good example of a compressed file that could be transmitted via an XBee.

Would you briefly compare these to the Wireless HART and ISA100 devices/standards?
WirelessHART and Zigbee share IEEE 802.15.4 as the basis of their physical layers. This allows them to use essentially the same hardware at about the same cost for transmitting and receiving. WirelessHART uses TDMA, which allots individual time slots for each transmission. ZigBee uses CSMA with collision detection. In WirelessHART, each node operates as a router, which is similar to that of DigiMesh.

Can I code the modules or must I use an external processor?
Digi does offer ‘programmable’ variants of both ZigBee and DigiMesh modules, which includes an 8-bit microprocessor onboard the module that can be programmed with a custom application. In most cases, customers use their own external microprocessor with our standard XBee modules.

Solar Power Continues to Provide Electricity to Rural Residents in Africa

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Devergy Logo 300pxIn a previous blog post, we shared Devergy and the work they’re doing to connect underserved areas to reliable and affordable electricity. The company was founded in 2012 and has quickly grown a customer base that loves their affordable and clean energy solution.

In short, Devergy is installing solar grids to power remote villages in Tanzania. The solution involves XBee to connect the entire grid to measure energy consumption, enable remote monitoring, and through an XBee gateway, connect to the global cellular network. Access to solar energy allows residents to stop spending significant amounts of money on kerosene for lighting, phone charging and dry-cell batteries for radios. And, saving money isn’t the only benefit, the solar electricity improves air quality and provides businesses the opportunity to operate for longer hours.

We last checked in with Devergy two years ago and since then, they’ve continued to find success and grow a sustainable business. They acquired funding from Acumen, OPES Impact Fund and HERi Africa which is crucial to fund their expanding operations. And, their customer base is growing with new villages in Tanzania. Currently, the Devergy solar solution is operating in 12 villages: six in the region of Mbeya (with expansion happening daily), five villages in the Morogoro region, and Matipwili (the first village).

The team is growing too! The full-time staff has quadrupled since 2012, and they are constantly hiring in the villages to help with sales, installations, and maintain a close relationship with the communities they serve. By the end of 2016, the plan is to have 7,000 households connected!

To get more technical details on how wireless technology like XBee is helping Devergy provide energy across Tanzania, read their customer story here. To learn more about the Devergy mission, click here and visit their website!

The Evolution of LTE for IoT and M2M Devices

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When you hear LTE you probably start thinking of fast speed, high bandwidth, HD video, your favorite apps…lots of data. But, LTE can also be dialed back to create power-efficient cellular connected devices. This is a useful solution for connecting IoT devices like sensors and actuators to the Internet since they don’t transmit lots of data and operate under strict energy budgets.

Did you know there’s more than one type of LTE?

Within LTE there are multiple categories as defined by the global cellular standards body, 3GPP. Some of the categories are still in the process of being developed but one thing is clear, there will be split in the evolution of LTE. In one direction, LTE will continue to increase speed and bandwidth for smartphones and other data-hungry applications.  In the other direction, we’ll see cellular providers accommodating machine-to-machine communication with LTE designed for low power, low data, and low cost.

In the video below, Digi CTO, Joel Young, provides an in-depth look into how LTE technologies are evolving to accommodate the various needs of cellular connected devices.

We’re still in the early days of LTE for machines, but more advancements in LTE for M2M/IoT are on the horizon. Check out our technical brief “M2M in an LTE World,”  for more details on how these LTE categories differ and what it means for M2M/IoT product designs.

The Future of Mesh Networking: XBee Thread Demonstration

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Digi is hard at work developing the next-generation XBee module based on the Silicon Labs EM3587 chip, which will support the new IoT protocol, Thread. Due to Thread’s unique advantages like easy commissioning and robust mesh capabilities, the new module will be a valuable addition to the XBee ecosystem. With that in mind, we thought you might want to get a behind-the-scenes look at what we’re doing with this new technology.

Our development team out in Lindon, Utah created this informative demonstration showing a network comprised of both Thread and ZigBee devices and how they can all be controlled via a mobile application.

This is just step one in our development process so stay tuned for updates. Check out these resources to learn more about Thread:

And, if you have any Thread-related questions shoot as a tweet at @digidotcom or @XBeeWireless. You can also visit the official Thread website for more information.

How to Meet Critical Infrastructure Requirements with Cellular Devices

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Critical infrastructure operations—whether it be an electrical substation, wastewater treatment plant, or traffic control center–are relying more and more on networked assets like sensors and control switches. But, the introduction of connected devices also raises security risks. Since these systems control services both businesses and consumers heavily depend upon, regulations are in place to ensure our infrastructure remains in working order and secure from threats.

Much like the laws you abide by while driving such as wearing your seatbelt, staying within the speed limit, etc., utility providers connecting assets with cellular LTE must follow certain standards and protocols to ensure security and reliability. In North America, these rules and standards are referred to as North American Electric Reliability Corporation Critical Infrastructure Protection or more conveniently as NERC-CIP. For our friends in Europe, the standard is called “European Programme for Critical Infrastructure Protection” or EPCIP for short.

What makes a network solution NERC-CIP compliant? In this video, Brad Cole, Device Cloud Product Manager, walks through the steps many of our utility customers take in order to deploy secure and connected critical infrastructure.

In short, critical infrastructure operators must comply with these reliability standards—or face large penalties. The mandatory Reliability Standards include CIP standards 001 through 009 (see below), which address the security of cyber assets essential to the reliable operation of the electric grid.

  • CIP-001: Covers sabotage reporting;
  • CIP-002: Requires the identification and documentation of the Critical Cyber Assets associated with the Critical Assets that support the reliable operation of the Bulk Electric System;
  • CIP-003: Requires that responsible entities have minimum security management controls in place to protect Critical Cyber Assets;
  • CIP-004: Requires that personnel with authorized cyber or unescorted physical access to Critical Cyber Assets, including contractors and service vendors, have an appropriate level of personnel risk assessment, training, and security awareness;
  • CIP-005: Requires the identification and protection of the Electronic Security Perimeters inside which all Critical Cyber Assets reside, as well as all access points on the perimeter;
  • CIP-006: Addresses implementation of a physical security program for the protection of Critical Cyber Assets;
  • CIP-007: Requires responsible entities to define methods, processes, and procedures for securing those systems determined to be Critical Cyber Assets, as well as the other (non-critical) Cyber Assets within the Electronic Security Perimeters;
  • CIP-008: Ensures the identification, classification, response, and reporting of cybersecurity incidents related to Critical Cyber Assets; and
  • CIP-009: Ensures that recovery plans are put in place for Critical Cyber Assets and that these plans follow established business continuity and disaster recovery techniques and practices.

The Digi TransPort WR31 comes with features and configuration options to simplify securing critical infrastructure assets like electric and gas meters or traffic control cameras. The Digital I/O can address physical security concerns and Remote Manager will log user information and even device changes. Click here to learn more about the Digi TransPort WR31 and how utility provides are using it to connect critical infrastructure.

Customer Showcase: Wireless Devices Around the World Rely on Digi

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Every day Digi works with customers around the world to deploy connected solutions that businesses rely on. From the ability to monitor device health to using data to make more informed decisions-connected devices are modernizing business operations. Here are a few of the many companies we are proud to work with.powerowners

PowerOwners | Solar Energy

How do solar energy providers  measure the effectiveness of their solar panel deployments? You’ll probably get a wide variety of answers depending on who you ask. PowerOwners saw this inconsistency in the solar industry as an opportunity to create a standard benchmark to measure the performance of solar assets.

The centerpiece of the system is the Deno Smart Sensor. The sensor measures sunlight and temperature to simulate an energy benchmark. It’s placed alongside solar panels, the Deno Smart Sensor is pictured to the right. Data is transmitted wirelessly by a Digi XBee PRO 900HP and collected within Digi Device Cloud. This service replaces the commonly used weather stations, which were difficult to deploy and provided inconsistent data. Read the full story here.

Powermat | Wireless Charging

powermatThere are few things more frustrating than a dead phone battery. Almost everyone relies on their smartphone to get through the day-whether it’s for business or entertainment.

Powermat developed a creative solution that involves wireless charging and ZigBee technology. Their mission? Ensure that smartphone users never have to worry about where keeping their device charged. It’s easy to use, requires no cables or outlets, and gives businesses a service to offer to their customers. Powermat is able to manage their global deployment of charging stations via the cloud since each charging network is IP-enabled with an XBee Gateway.

The Powermat stations can be found at large retail chains like Starbucks, a select number of universities, and airport terminals. Users can install the Powermat app on their phone so they can locate the most convenient location for their next charge. Learn more about the Powermat service here.

MicroPower Technologies | Remote Video Security Systems

css-inline-solveilUtility providers often have assets widely distributed across remote areas. Ensuring security of substations or monitoring weather conditions can be a costly endeavor. And, when millions rely on your company for power, an outage can have large consequences. MicroPower works with utilities to create an easy to install solution that gives energy providers the ability to ensure their customers have reliable power. A means to remotely monitor their sites also allows for faster troubleshooting and fewer unnecessary maintenance visits.

MicroPower Technologies’ solar powered video system is made possible by the Digi TransPort WR21. The wireless cellular router is easy to install and provides the connection needed to stream video to a central database that can be accessed by network operators. Click here to read more about this solution.

Read more about how Digi customers are inventing new business models and changing their respective industries, visit our customer success page.

 

The Next Chapter in the Digi Story: Connect with Confidence

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This year represents a transformational moment for Digi as a company. We celebrated our 30th birthday. We have a new CEO. We’ve made a new acquisition and have brought on customers that represent some of the world’s most innovative companies.

Not too long ago, we held a retirement gathering for one of our long time employees. She’d been with the company for 28 years. She and others who have been here for the long haul started sharing stories about how things were in the early days. The stories were the perfect anecdote for how much things have changed over the years—over the decades. Those stories show how much Digi have evolved. But just as much as they show Digi’s evolution, the stories represent our powerful foundation of strength that we’re carrying into the future.


About 18 months ago, we set out to define how we would bring the meaning of that foundation and evolution to our customers, partners and the public in the clearest way possible. We asked ourselves: “how can our brand embody the sentiment of the stories our employees tell? How can our brand articulate why those innovative companies turn to Digi over others?”

To start, we went back to our roots. To our core value: listening. With 30 years of history and our diversity of experience, that’s what made sense. You can find Digi products in vast oil fields, intensive care units, crowded freeways, factory floors, and in retail stores on Black Friday. There are millions of devices deployed in the world, each with a critical task to perform. We needed to talk to the people who depend on those connections in order to articulate our mission best.

So, we conducted deep customer and partner interviews, employee surveys and spent time with our partners. All in all, we went through 100 interviews, 125 surveys and 10 workshops—more than 500 hours of listening.

It led us to a key finding: it’s time to modernize the Digi brand, but to emphasize not change, who we are at our core.

So, here we are today.

What is the new brand?

At its core, we have the brand promise, what you can expect from Digi, why would you choose Digi:

Digi works with you to solve mission-critical and business-critical machine communication challenges in the most demanding environments. You get proven, no-nonsense solutions that work, and keep working. With Digi, you can create, deploy and manage your M2M and IoT connections with confidence.

What we heard in those 500+ hours of research is that there’s something our customers get when they choose Digi: trust. They trust the people, the products and the company.

In short, we help you CONNECT WITH CONFIDENCE.Digi-Logo-Timeline

You’ll see “connect with confidence” as our new tagline and continued promise to you. You’ll also see the evolution of the Digi corporate logo. It represents exactly what the tagline does: sturdy, solid, reliable Digi. We’ve also gotten Digi out of the box and added a new shade of green—energetic and agile. We are company that our customers can connect with confidence, and we’re dedicated to doing so with fresh energy.

Thank you to everyone who took the time to play a role in this process. Listening to you has helped us get to a place where we’re truly sharing who we are with the world.

We’d love to hear your thoughts in the comments section below.

Look What I Made: XBee Project Gallery Update

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Farm Safety Wearable
The sweep auger motor plugs directly into an outlet on the receiving box. This receiving box and transmitter each have an XBee wireless transceiver inside. When the remote control is powered on, the first LED lights up. When the safety cord is connected, the second LED lights up. At this point, the sweep auger is off.

Connected Greenhouse
Using an Intel IoT Gateway, the wireless systems turns daily farming data into a more meaningful decision-making. Sensors for temperature, humidity, pH, and luminosity in the greenhouse pass the data to the local Galileo gateway. Galileo transmits data using XBee to an Atom processor-based gateway, and then uploads all the information to the cloud system.

Wireless Boat
This RC boat uses XBee for wireless control. The controller is fashioned from an old Air Hogs controller. An Arduino Pro mini is connected to the XBee, analog stick for steering, LEDs, and triggers buttons.

Do you have an XBee project you would like featured in the XBee Project Gallery? You can submit your own or someone else’s project here.

Contact a Digi expert and get started today! Contact Us