Topics I'm Exploring:
Pi/Arduino/Photon Sensors: Temperature,
Devices: Darlington array,
MCP3008 (analog input),
A variety of motors,
Programming in Shell, C, Python,
Security camera app,
Unifying Pi software structure,
Pi access and control from the Internet,
Wireless device control.
Old business: I had yet another wifi failure with the Frontier DSL modem -- again ethernet-connected devices continued to get Internet (including my iMac and the Pi) iPhones and iPad indicated the wifi was available but it didn't work.
So, it looks like a Frontier problem -- not the Pi.
New business: I need my Pi application to have Internet access. The cheapest option seems to be by using a cellular modem (e.g.: Verizon Mifi). The best deal at the moment seems to be a company called Karma (is it bad karma to mess with that name?). It's a no-contract deal: buy the modem/wifi device and buy megabytes as needed. However, its coverage doesn't work for me. Not as cheap but Datajack or Virgin no-contract plans show good 3G where I need it. Down side: I had Verizon Mifi for a while; it wasn't terribly reliable.
Sensors: I got my motion sensor working (PIR device from Adafruit). Like some of the other devices, it has odd personality quirks.
What I learned: * You only have to poll the device about every 5 seconds -- the device keeps returning "true" for 6 or more seconds after the briefest movement.
* The angle of detection seems to be a bit over 90 degrees.
* The room I'm testing in isn't big enough to tell what the maximum sensing distance is.
BTW: In case my text formatting looks strange on this page -- well, today blogger.com doesn't do automatic text wrap -- so I've typed my own line returns. Strange!