What’s the difference between Bluetooth and ZigBee?

bluetooth-logo-2.jpgThis post is by Joe Lomako, Telecoms & Radio Business Development Manager, TRaC

Here’s a very quick run-down of the present differences and similarities of these two remarkable technologies
Let’s firstly take a look at the similarities: 
•    They are both short range devices
•    They operate on an unlicensed band at 2.4GHz
•    They use spread spectrum modulation techniques
…and the differences:

•    Although they use spread spectrum modulation they have different types: Bluetooth uses Frequency Hopping Spread Spectrum (FHSS) and ZigBee uses Discrete Sequence Spread Spectrum (DSSS)
•    ZigBee tends to have a longer battery life than Bluetooth because of low power applications – potentially years compared to days
•    The applications tend to be different; ZigBee is aimed at control, automation and low data rate transmissions, whereas Bluetooth is generally aimed at high data rate applications (eg. music and film streaming)
•    ZigBee network joining time is typically 30 msec where as Bluetooth is of the order of 3 secs

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* New immunity standard for IT equipment, but is it any good?

* ENERGY STAR programme gets tough

* 5 ways to fail Low Voltage Directive (LVD) testing

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* CE Declaration of Conformity… is it worth the paper it’s written on?

* Seeing is believing

* Withdrawing presumption of compliance

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* Is UK really sharpening its teeth for CE Marking Enforcement?

* What’s the difference between the UL and MET Listed Marks?

* Military environments warrant separate standards?

* Military CE Marking – Let’s Work Together

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* What’s the point in CE Marking military equipment?

* Navigating the approvals process for RF enabled medical devices

* Seven Reasons to Conduct Pre-Compliance EMC Testing

* And you thought your EMC tests were difficult!

* Regulation of energy efficiency presents new certification challenges

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* 14 environments with explosive atmospheres

* Electronics in explosive atmospheres – standards stop things going bang!

* A guide to reliability testing, part 3 – Environmental Stress Screening

* A guide to reliability testing, part 2 – HASS

* A guide to reliability testing, part 1 – HALT

* Certification & Test: Flammable atmospheres – A change to the ATEX Standards for zone 2 equipment

* Certification & Test: How to make sure products comply with Noise at Work regulations

* Certification & Test: The impact of the Noise at Work Directive on your designs

* Certification & Test: How am I going to test that?

* Certification & Test: Electrical safety is still important!

* Certification & Test: Why bother with vibration testing?

* Certification & Test: Do I really need earthquake testing?

* Certification & Test: Differences between earthquake and vibration testing?

* Certification & Test: Safety – it’s a complex business!

* Certification & Test: What’s the point of a Notified Body?

* Certification & Test: The difference between Bluetooth and ZigBee testing?

* Certification & Test: Is above 1GHz the new Wild West?

* Certification & Test: Where have all the ZigBee products come from?

Tags: test entries

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