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42 votes
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Why 2.4 GHz Band?

2.4 GHz is one of the industrial, scientific and medical (ISM) radio bands. ISM bands are unlicensed, which makes it easier to certify the equipment with FCC (or its counterparts in other countries). ...
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27 votes

Why 2.4 GHz Band?

The "special" thing about 2.4GHz is that when spectrum was allocated for various needs in the 60's and 70's, no one wanted it, because it was thought that atmospheric water absorption made it useless....
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14 votes

Why 2.4 GHz Band?

It is 'special' since it does not go very far. Strangely, this turns out to be an important advantage as many devices and people can use the same band in near by area without interference. Tele ...
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9 votes
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How does frequency affect the ability to traverse objects in RF transmissions?

The rule of thumb a lot of people use is that lower frequencies will have better "penetration" than higher frequencies. That's true in some cases, but not all. This is probably derived from ...
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  • 1,648
7 votes
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868 MHz frequency standard

In Europe, you would have to comply with EN300220 which is an ETSI standard. If you use a library for the MAC layer of Zigbee, this will have been done for you, but if you write your own MAC layer, ...
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  • 8,082
6 votes

'Not Mount' on PCB Design

The board is laid out with footprints for the components indicated, but they are not populated by default. Sometimes the acronym DNP (Do Not Populate) is used. Some variant of the board can be made ...
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6 votes
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Zigbee PCB layout - bad signal reception

I am sorry to be the bearer of bad news! There are a few things that stand out. In addition, even after these problems are corrected, there's still going to be a lot of learning and analysis to do. ...
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5 votes

ZigBee vs WiFi for wireless communication

ZigBee (and more generally 802.15.4) targets different uses compared to WiFi (control vs data streaming), thus has lower data rate (250 kbps max) but also much lower power consumption (few tens of mW ...
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  • 13.2k
5 votes

Why 2.4 GHz Band?

Some of the reason is cost (both financial and power budget with distance), some is because what frequencies are reserved for other types of devices/communications and the interference caused by such ...
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5 votes

Latency concerns for a wireless audio mixer?

Music is a special case for audio latency. For speaking, or voice conversations you can have up to 100mS latency before it impedes the conversation - though it can be noticeable at that latency. ...
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5 votes
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Zigbee firmware for CC2530 chips

There is FW available for free. You should download TI's zstack-home from here: http://www.ti.com/tool/z-stack you the have a few options: Use IAR (this will meaning buying a license) to write a ...
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  • 446
5 votes

What are the advantages of Zigbee over Bluetooth?

Zigbee must survive 2 yr battery life with low power, low bit rate. Bluetooth must support smooth streaming audio which was the original market. These are exclusive requirements.
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4 votes

How to avoid regulatory approval regulations, when chosing a RF module?

Pre-certification may apply to the module you are using, but you are still required for CE marking of the device. Part of the process for CE marking requires you to show evidence that your DEVICE ...
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  • 3,326
4 votes

XBee and ZigBee for long distance signal transmission

All the clues are in the answer linked to in your question. Here's a recap: - Using minimum data rate (20kbps) you need a theoretical power at the receiver of -111dBm Free space link loss at 10km is ...
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  • 379k
4 votes
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Zigbee communication outdoors at long distance ( around 1 - 1.5 km)

Minimum data rate for Zigbee is 20k bits per second and this dictates the bandwidth of the receiver. The wider the bandwidth of the receiver, the more noise the receiver picks up so running at a ...
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4 votes

868 MHz frequency standard

This band is reserved for Short Range Devices by ETSI. There is a sub-allocation for streaming audio with 100% duty cycle and 10 mW ERP limit, and a few allocations for digital transmissions with 0.1% ...
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4 votes

ZigBee Light Link and XBee interoperability

I know this is an old post, but since I stumbled on to it looking for a profile I had not seen before I figure this answer may help someone else. I've been working on this for a while - I don't ...
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4 votes

TI CC2650STK - How to activate ZigBee?

The CC2650ST supports ZigBee, BLE or 6LowPan. It comes programmed with BLE by default, you need to download the BLE sensor tag app from app store and update the FW to the ZigBee image. This will ...
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  • 446
4 votes

direct ZigBee communication with Philips Hue smart light bulbs

No you can not. The Hue network is a ZigBee Light Link network, and a ZigBee Light Link Network uses "secret" ZLL security keys. Home Automation networks use public security keys, and hence if this ...
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  • 446
4 votes

What is the technical difference between wifi and Zigbee?

tl; dr: ZigBee isn’t a subset of WiFi (802.11). It is a different protocol family, just as Bluetooth is another different protocol family. ZigBee, BT and WiFi are not directly compatible with each ...
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3 votes

Why 2.4 GHz Band?

As others have said, it's an ISM band, and all of the other listed reasons are totally valid, but I think another part of of the reason it's more popular than other ISM bands is that it is available ...
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3 votes

ZigBee module compatibility

Actually the answer from hanu is not correct. The XBee series 2 modules are ZigBee compliant (ZigBee Certification). What you called the "Digi stack" is only the application profile they use. ZigBee ...
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3 votes
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Replay Philips Livingcolors remote signal

The Living Colors series has two versions (AFAIK). Generation 1, which the remotes used a MSP430 microcontroller connected to a CC2500 RF Transceiver which pairs with another CC2500 in the lamp itself....
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3 votes
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Adding a router (no key) to an encrypted Zigbee network

It depends which layer is encrypted. If the MAC layer (addresses, packet descriptors etc) is encrypted, a router would be useless. If only the packet payload is encrypted, then a router can fulfill ...
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  • 6,650
3 votes
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How to increase range of zigbee?

1- Depend on the manufacturer of your ZigBee maybe it provides a setting/configuration to increase the range. You should provide information about manufacturer and model. 2- Technically it is ...
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  • 318
3 votes

Create a new wireless protocol for industrial

One of the disadvantage associated with zigbee modules for communication is the high cost. Moreover Zigbee is intended for short range. Radio links are the cheapest and long range solutions. ...
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  • 680
3 votes

How can a Zigbee coordinator send commands in large networks (greater than 240 devices) to nodes?

If the maximum amount of endpoints on any ZigBee device is 240, how could it send and recieve commands in large networks of more than 240 devices? Where are you getting this information from? It is ...
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  • 446
3 votes

XCTU for programming?

XCTU can't really do dynamic things like that. It's built almost exclusively to update firmware / check radio settings (and it's not even that good at that). You can send the same packet over and ...
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3 votes

Programming a JN5168-001-Mxx with a USBtinyISP?

Maybe I am late to answer this, but thought to share the ideas for others who may come across this question. You can use FTDI FT232RL or any such USB to TTL converter, connect Rx/Tx of one with Tx/Rx ...
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3 votes
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Integrating a Zigbee stack on a bbox

Yes this is feasible. A few points though: For the hardware part, I chose the cc2531 from Texas Instruments, I see that it comes configured as a coordinator which is what I want. This is not ...
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