When [Doug] moved into his new house, he found an old alarm panel set up — but it had no monitoring ... on GitHub in case you also have a DSC 1550 alarm system. It’s a pretty slick hack ...
If you have a DSC PC1500RK control ... the yellow wire (clock) to digital pin 3 and the green wire (data) to digital pin 2. A communication cycle starts by setting the data line high, then ...
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