>Now, paper towels, coffee or sugar can communicate their status using WiFi.
Internet of edibles?
God help us all :)
UW engineers achieve Wi-Fi at 10,000 times lower power
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Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#12This article is a few months old. The technology is now being commercialized by the same authors, as Jeeva Wireless: http://www.jeevawireless.com/
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#13It looks like this can only transmit, not actually receive and interpret data-- and if you listen carefully, this is the kind of applications they're suggesting. That's good for sensor nodes reporting status, but not so good for interactivity.
Any source for it being unidirectional?
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#1410,000 times lower power, but achieving speeds up to 11Mbps Being named passive wifi. Quite neat and could be useful for IoT considering also approx 100 ft distance
You won't be downloading OS images very well, but it's still a lot. That's two HD videos simultaneously, with some to spare.
I take it you've never used 802.11b. You were lucky to get a single YouTube video at 480p to load without downgrading, let alone two HD streams.
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#15This seem another wifi achievement only replicable in a desert environment, during a solar maximum, on the dark side of the moon, while holding a black cat. If you are using a "wifi" antenna then that antenna is going to be picking up all sorts of little things. Normally these aren't much of an issue, but at these sensitivities suddenly that phone down the hall, the one not running at a 10e-3 power setting, is a real…
There's nothing wrong with posting older material to HN if it hasn't had attention yet. I'm not sure if this story had, though.
The "new" in "Hacker News" is more like a second-hand clothing store in my neighbourhood that used to be called "New to You".
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#16The low-power devices don't actually generate any signal at all thus don't have to pay that expensive power cost. Instead a passive antenna is modulated to reflect or absorb ambient signal, the reflected signal conforms to traditional 802.11 packets. The ambient signals are created by a relatively high-powered device that is plugged into wall power. Here is a 2 minute video showing an early prototype of their work fr…
Their video from 2013 shows some pretty cool applications of an earlier version of this tech that looks essentially like passive NFC using ambient RF rather than using 802.11.
Very cool stuff!
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#17The low-power devices don't actually generate any signal at all thus don't have to pay that expensive power cost. Instead a passive antenna is modulated to reflect or absorb ambient signal, the reflected signal conforms to traditional 802.11 packets. The ambient signals are created by a relatively high-powered device that is plugged into wall power. Here is a 2 minute video showing an early prototype of their work fr…
As far as I can tell, it seems to work the same way that passive RFID tags work. Pretty neat, I guess.
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#18[deleted]
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#19>Now, paper towels, coffee or sugar can communicate their status using WiFi. Internet of edibles? God help us all :)
You say that but if we could easily swallow or "tattoo" cameras/sensors, there are many medical upsides.
Re: UW engineers achieve Wi-Fi at 10,000 times lower power
#20The low-power devices don't actually generate any signal at all thus don't have to pay that expensive power cost. Instead a passive antenna is modulated to reflect or absorb ambient signal, the reflected signal conforms to traditional 802.11 packets. The ambient signals are created by a relatively high-powered device that is plugged into wall power. Here is a 2 minute video showing an early prototype of their work fr…
Did they just say enabling internet for billions of battery free devices? Is it like a push method? So I guess I could imagine state updates, or task pushes to autonomous agents.