Communicating w/o Standard WiFi

silo2Figure 1: The communications device antenna is within its protective sleeve.

More than one way to communicate

To communicate between devices, one can use standard WiFi, but devices for it typically have a pretty high power consumption rate.  I found some micro powered communication boards that operate in the unlicensed 2.4 GHz band (in the same frequency range as WiFi).   These devices can run on as little as 5 milliwatts.  I’ll describe my experiments with them in the next page or so.

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Testing the Membrane Pad on the Pi2

firstmembranetest-frontface1Figure 1: Testing the membrane pad on the Pi2 powered “homemade” tablet.

The little pull-up board was mounted near the Pi2, so as to make the wires shorter.  It was mounted vertically, in that space between the enclosure’s connecting posts.  Then, I made the first test of the membrane pad, using the wiringPi gpio command to read all GPIO at once …

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