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21 votes
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Selecting a microcontroller for a battery operated data collection project

A general process of microcontroller selection. Sum up your requirements towards the microcontroller. For example in this case: 1 hardware timer, to measure time between trigger and echo pulses. 2 ...
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13 votes

Difference Between ZigBee and Z-Wave?

There are a few things that really distinguish Z-Wave and ZigBee from each other. Frequency The first (as Eirik M noted) is the frequency on which they operate. Z-Wave operates within the 915 MHz ...
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  • 231
11 votes

Can ZigBee be used without a hub?

If you have no intention of communicating with a device that doesn't use ZigBee, you probably wouldn't need a hub. You might be interested in 'Why do I need hubs for some devices when automating my ...
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11 votes

Can I use Xiaomi ZigBee devices with SmartThings or other hubs?

Xiaomi sensors can be paired with SmartThings, according to this blog: Log in to the SmartThings IDE Create a new device handler using the sources provided on GitHub Click 'My Location', then 'Events'...
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  • 111
9 votes
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Difference Between ZigBee and Z-Wave?

I think there is mainly one thing you should care about: Is the ZigBee solution 2.4 GHz or 868/908 MHz? The 2.4 GHz penetrates less then ~900 MHz through walls, and the 2.4 GHz shares the spectrum ...
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  • 351
8 votes

Has anyone designed a custom IoT wall switch?

The lightwaveRF lighting protocol is simple OOK at 433 Mhz, I think. It's documented, so you could use them. Maybe a little bit more expensive than other options though. Here is an Arduino/Raspberry ...
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8 votes

A low cost alternative option for ZigBee stack in mesh network of sensors

If you're not married to Zigbee's flavor of 802.15.4, you should take a look at Helium's end-to-end wireless capabilities. (I work for them - naturally.) Our module uses the same PHY but pushes most ...
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8 votes

Suitable wireless technologies for high density industrial IoT

Your challenge is handling the throughput demands with channel contention. Your devices are all close enough that you need to assume they are all potential interferers to each other so you will need ...
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7 votes
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Can I implement ZigBee with generic hardware?

You could, but you'd need a radio transceiver with compatible frequency range, modulation, and data rate. Typically radios with those capabilities are either sold as Zigbee radios, or for the ...
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7 votes
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ZigBee sleep problem

You say you built a Zigbee network using Digimesh protocol. The thing is that this is an impossibility: Zigbee and Digimesh are competing solutions for mesh network, not something you use together. ...
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7 votes
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Is wireless mesh a poor choice for sleepy devices?

It is actually possible to allow for sleeping nodes without the need for time synchronization. The basic idea is to send a message multiple times until the node finally wakes up. There is of course a ...
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  • 649
7 votes

Optimal Wireless Technology for High Data Rate & Low Latency IoT Application

Latency vs Rate a low-latency (10 Hz) type of IoT application This is a conceptual error. Latency and Rate are largely independent. You could have a system which recorded thousands of readings ...
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7 votes
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Are wireless mesh networks limited to PAN applications?

That is a very good question and actually my current research topic. I try to give an adequate but concise answer¹. I will focus my answers to networks based on the IEEE 802.15.4 standard (Zigbee and ...
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  • 649
7 votes
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Why are Zigbee hardware modules so expensive?

As comments indicate there is apparently indeed a licensing and certification process involved that might indicate where some part of the price stems from. Though well known in the automation ...
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  • 8,095
7 votes

Why are Zigbee hardware modules so expensive?

There are a number of 802.15.4 solutions which are not Zigbee, and cost less. See this article: "What’s The Difference Between IEEE 802.15.4 And ZigBee Wireless?" As I understand it, to use the label ...
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  • 71
6 votes

Can I use Xiaomi ZigBee devices with SmartThings or other hubs?

There isn't any official support, but a user in the SmartThings Community forum has created some device types that should work with the motion sensor and on/off switch here: I have created a simple ...
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6 votes

Has anyone designed a custom IoT wall switch?

Z-Wave is a mesh networking technology commonly used for home automation that allows many different brands of products to interoperate with each other very easily. However, it is a patented ...
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  • 2,422
6 votes

ZigBee integration (IP/Gateway)

Ubisys G1 seems to be a device (the only one?) that does this. A brief description from the product page, for reference: Our gateway links your ubisys smart home to the outside world. It ...
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  • 241
6 votes
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Control Samsung Smart TV (Infrared Remote) via Hue / Zigbee?

The Logitech Harmony Hub is a smart hub that can control devices via infrared (like your TV remote), and is compatible with Alexa. It doesn't work via ZigBee, though — it connects via Wi-Fi to your ...
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6 votes

Understanding ZigBee Light Link protocol

I had the same issue when scanning for zigbee packets with Ikea Tradfri. The solution on my end I found by chance when switching the scanning channel from 11 to 15. Apparently the commissioning ...
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  • 61
5 votes
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Zigbee network intermittent issues

It is important to identify whether the problem is : Devices or network deployment Devices or network configuration. Devices Hardware (or firmware versions) Environment Security configuration The ...
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5 votes

Can ZigBee be used without a hub?

If you want to bridge from WiFi (Google and OnHub) to ZigBee, then you will need a device which handles the bridging function. This doesn't have to be a proprietary bridge, it could be as simple as an ...
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5 votes

Selecting a microcontroller for a battery operated data collection project

Looking at ease of programming and low cost, I would probably start with some kind of Arduino module (or low-cost clone). Code for your ultrasonic sensor already exists, as does example code for ...
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5 votes

Ultra Low Energy point-to-point protocol choice

As is often the case, it depends. There are many factors to consider, and a lot of options available to cover the many different use cases around. Range DigiKey suggest that you can expect the ...
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5 votes

Zigbee and supporting devices - UK

From what I'm reading you need bridges for specific devices, unless they support Z-Wave or Zigbee (may well be wrong on this...). In general, you need a "bridge" for everything - including Z-Wave and ...
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  • 136
5 votes

Decrypt ZigBee traffic of IKEA Tradfri

It's unclear from your post which link key you are using. If it is the standard ZigBeeAlliance09 TC link key referenced in the post, then it will likely not work since Tradfri uses ZigBee Light Link. ...
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  • 136
4 votes

Are wireless mesh networks limited to PAN applications?

If you consider that the internet is a mesh network of sorts, you should see your answer in the broadest terms. Asking is a specific mesh network has any scalability issues is slightly different. ...
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4 votes

A low cost alternative option for ZigBee stack in mesh network of sensors

I would suggest painless mesh or easy mesh. Their Github pages (on the links) say specifically that they are for esp8266 and thus they are very cost effective.
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  • 4,301
4 votes
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Automatic link failure detection methods in ZigBee networks

From what I've found, it seems that some implementations (e.g. TI's Z-STACK) recommend refreshing the routing table every so often to avoid 'dead' nodes: Yes, I waited 5 to 10 minutes. What is "...
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4 votes

Difference Between ZigBee and Z-Wave?

As a software guy—and a protocol stack guy at that—I tend to look differently at this than you might. To me, these protocols are "low level" stuff (layer 1 & 2 of the OSI 7 layer model). I don't ...
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