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Why I am sometimes not so enamored of short RF links

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BicycleBill
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re: Why I am sometimes not so enamored of short RF links
BicycleBill   1/10/2010 11:47:05 PM
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I'm not readfy in terms of expense to step up to that level...but you make some good points. Key point is that a simplex, wireless protocol has some severe potential weakness.--Bill

WKetel
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re: Why I am sometimes not so enamored of short RF links
WKetel   1/6/2010 10:06:23 PM
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The fact is that I don't have nearly as much at stake regarding knowing my bike speed, as anybody in the Tour De France. So there is really no reason for me to even consider purchasing a hi-end wireless system. The "cheap-trick" way to have a more reliable system would be to put the speed calculation function in the part that has the wheel pickup, and then just send the display update periodicaly, like, whenever the speed changed. If the pickup was on the rear wheel then it would not be in a position where it was likely to be damaged, which is more a concern for those of us who sometimes bike off-road and even cross-country, off-trail. An added advantage is that the display section could look even more stylish, which in many products seems to be far more important to the buyer than the product functionality.

InterestedinRF
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re: Why I am sometimes not so enamored of short RF links
InterestedinRF   1/6/2010 3:49:27 AM
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Bill, you don't mention the cost of your wireless bike speedometer, but this might be a case of "you get what you pay for". Most of the high end wireless bike equipment makers now uses wireless technology based on the ANT+ protocol. I use it and it performs faultlessly, simultaneously recording speed & distance, cadence, crank power (and heart rate too). In addition, the top ten riders in 2009's Tour de France used ANT+ wireless technology, including the winner, Alberto Contador, and third placed Lance Armstrong. These elite riders wouldn't be using wireless unless it was totally reliable. The RF protocol checks that the signal has been received, otherwise it resends the packet. The downside is that ANT+ wireless sensors aren't cheap.

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