Advanced Telemetry CTO

i love you daddy :D

2010-07-12T18:38:30.534-07:00

i love you daddy :D

Zigbee is not the only protocol that uses the 802....

2010-01-14T08:32:51.306-08:00

Zigbee is not the only protocol that uses the 802.15.4 radio.
WirelessHART does as well, with MUCH higher reliability and lower power consumption. That's why so many large companies are using it (ABB, Emerson, GE, Siemens, ...)
http://www.sics.se/esna/index.php?option=com_content&task=view&id=386&Itemid=39

Great Post! There are ways to have more control o...

2010-01-14T05:41:47.188-08:00

Great Post!

There are ways to have more control over certain aspects of your stack. Most people only need the outward portions of their network to interoperate with others and could therefore use a configurable stack for parts of your network that need to talk to each other. The memory requrements of these protocols tend to be much more resonable than Zigbee as well. MiWi from Microchip and CyFi from Cypress are two examples.

For example, RFDs tend to be kicked off the Zigbee network if idle for more than 5s. This timeout is inherent to Zigbee, but using a modifyable stack could overcome this behavior.

Congrats on getting these large networks comissioned!

Tom, Very interesting post. There is a new alt...

2010-01-13T23:05:59.373-08:00

Tom,

Very interesting post. There is a new alternative to both ZigBee and Z-Wave called DASH7 (www.dash7.org) which I hope you have a chance to see. ISO standard, 433 MHz, extensively used by DoD, 10x the range of Zigbee, 10x the battery life, 10% of the total cost of ownership, penetrates walls, concrete and "bends" around metal things like HVAC or stainless steel dishwashers or ovens like the ones you mention in the restaurant scenario above. Current silicon from TI and ST Micro with more on the way.

Tom, A Nice point of view article on the subject...

2010-01-13T12:09:53.881-08:00

Tom,

A Nice point of view article on the subject. I have been working with Zigbee (Ember) for the last year and yes, I have nearly pulled my hair out a couple of times wondering what the heck the stack is doing somtimes.
That said, overall Zigbee cannot be ignored and I am sure it will shape up.

Regards,

Dale.