Guys,
It could be that the Nike uses http://www.thisisant.com/index.php?section=31 as the specifically mention foot pads and the nordic semi chip nRF24AP1 as having the built in Ant protocol.
The site also gives good timings for the chips at 1hz 4 hours per day.
Diarmuid
ANTs - interesting.
The ANT11TR21M2 RF Transceiver Module spec says it has -4dBm (2.4GHz band) transmitter power. That’s less than half a miliwatt. The IEEE 802.15.4 chips are 1mW or 60mW, as a rule.
Receiver sensitivity spec is -85dBm which is not good at all compared to 802.15.4 and others - at -95 or -100 (they claim).
So these are intended for very short range applications - like 10 ft or less with line of sight or nearly so.
Perhaps these modules (not chips) are $1-2 so for the application - that’s OK. If you are ok with a proprietary product that has no second sourcing like the IEEE standards-based chipsets ('15.4, '15.3, and '11). Vendor Dynastream Innovations Inc. isn’t exactly a well known name like TI/Chipcon or Freescale/Motorola.
But hey! An order for a million from Nike can make the company (for a while), except for 1 million times $1 less 40% discount = not much revenue! Make that 100 million, please.
I have emailed Dynastream (thisisant), and they said they have nothing to do with the Nike product.
I am currently trying to understand the wireless data transmitted to find out how many steps a jogger is doing. If anybody is smart enough to make sense of that data, I would love to hear from her/him.
See my post here:
http://www.ipodlinux.org/forums/viewtop … light=nike
Thanks!
ANT is used by a company called Suunto (www.suunto.com) to connect
their T-series watches with different pods. They have at least GPS,
pedometer, bike and PC pods available. Google for ‘suunto nrf24l01’.
isnt the nike one using nrf2401 ? like in http://www.sparkfun.com/commerce/presen … -Internals
or are you talking about a different one
Yes, the Suunto products are quite different than the Nike ones. Go check their website to see the T-series wristwatches. It seems that at least two vendors are using NRF:s. Suunto uses ANT-protocol, but I have no idea what is Nike using.
hey!
i’m researching some stuff about [pedometers and i found your discussion. Anyway, i just want to ask what are the implications of having a wireless system on a pedometer?
does that affect the device’s functions or are their functions totally independent from one another? Any feedback on the reliability of wireless pedometer would be greatly appreciated.
thanks…](http://www.pedometerreviews.com.au/)