What’s the difference between Bluetooth and ZigBee?
This 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
Previous Certification & Test entries:
* Do you really know what’s involved with safety testing?
* So what’s new in RF connected medical devices?
* 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
* If WEEE’s in, what’s out?
* CE Declaration of Conformity… is it worth the paper it’s written on?
* Seeing is believing
* Withdrawing presumption of compliance
* Four Things You Need to Know About Seismic Testing
* 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
* Why are there so many emissions standards?
* 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
* Why does volcanic ash cause aircraft flights to be cancelled?
* 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?
declaration of conformity
, modulation techniques
, music and film
, test entries
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