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- Mon Jul 05, 2010 1:46 pm
- Forum: ZoneMinder Previous Versions
- Topic: External Alarm trigger from COM port
- Replies: 8
- Views: 10544
ANSWER:
Ok, so to talk to a serial port you need something a little more intelligent than a wire or a switch. You must actually send data meaning syncronized ones and zeros/on off's. To do this you need a microprocessor or a very elaborate integrated circuit and a standard UART. (Don't stop reading here ...