blackriver Posted November 18, 2008 Share Posted November 18, 2008 I was wondering if anybody every dug into how these signs work. I have been googling some of the brands and types that I've encountered in my neighbourhood, and reading the documentation I could get my hands on. I'm interested in how these signs get updated with new text. The docs all stay pretty vague on this subject: usually they mention a "wireless method", and list bluetooth, wireless/wifi, or GSM/phone as possibilities. I don't know how bluetooth or wireless could be useful, as you'd still have to drive over to the sign (if it's a fair distance from the building where the owner is) to be in close enough promixity. GSM (mobile phone) sounds like a better solution. The signs I see around here are the same as on the pic, except they have a small 6" antenna on top. Is this a sign of GSM technology? (As I don't see any modern phones needing such an antenna). Is this interceptable in any way with "hobby hardware"? I'd love to brainstorm about this with interested people. Quote Link to comment Share on other sites More sharing options...
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