I am trying to create a built-in outdoor bus arrival time display at my university. I would like the device to use my WiFi protected WiFi network to show arrival time updates defined from the script server. I have a job.
I was hoping to get advice on the high-level operation of this thing - would it be better if the display panel polled the hosted database via a Wi-Fi network or do I need a script to try to contact the board directly over 802.11? (Push or Pull?)
I planned to use a Wifly or WIZnet ethernet card in combination with a wireless access hub. Mostly inspired by this project: http://www.circuitcellar.com/Wiznet/winners/001166.html Can anyone recommend anything else on one of the WIZnet boards? I saw the SPI / UART options and thought that these boards could work with the AVR platform.
And out of curiosity - if you need to "coldly start" this device (that is, request the bus arrival time by pressing the button on the display), you can expect it to take 10-20 seconds to get the assigned IP address and connect successfully to the database, does it sound right?
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