Difference between revisions of "Home Automation"
From Makers Local 256
(additions of pros and cons) |
(→RFID: added implementation section) |
||
| Line 7: | Line 7: | ||
===Cons=== | ===Cons=== | ||
* Keys easily stolen with anonymity | * Keys easily stolen with anonymity | ||
| + | |||
| + | ===Implementation=== | ||
| + | ====Materials==== | ||
| + | * Need a reader with good range. Can be found for [http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300060435830&ssPageName=MERC_VI_RSCC_Pr12_PcY_BIN_Stores_IT&refitem=300222598671&itemcount=12&refwidgetloc=active_view_item&usedrule1=StoreCatToStoreCat&refwidgettype=cross_promot_widget&_trksid=p284.m184&_trkparms=algo%3DDR%26its%3DS%252BI%252BSS%26itu%3DISS%252BUCI%252BSI%26otn%3D12 under $100] | ||
| + | * To build a system that can perform coming/going detection, would need two readers. or 1 + N readers, where N is the number of approachable directions | ||
| + | * Need a writer. [http://search.ebay.com/search/search.dll?sofocus=so&sbrftog=1&dfsp=32&from=R40&satitle=RFID+writer&sacat=-1%26catref%3DC6&sargn=-1%26saslc%3D2&sadis=200&fpos=ZIP%2FPostal&sabfmts=1&saobfmts=insif&ftrt=1&ftrv=1&price=1&saprclo=&saprchi=100&fsop=32%26fsoo%3D2 Under $100] | ||
| + | ** Some writers are substantially more expensive. Q: Why the price difference? | ||
| + | * Need a server | ||
| + | * Need an UPS for the server | ||
| + | * Need a deadbolt actuator that can be overridden standard metal key | ||
==iButton== | ==iButton== | ||
Revision as of 19:24, 8 May 2008
Contents
[hide]Entry Automation
RFID
Pros
- Hands-off access
- Hands-off tracking of access
- As long as user has their RFID tag on them, their presence within a certain proximity around the reader will be recorded.
Cons
- Keys easily stolen with anonymity
Implementation
Materials
- Need a reader with good range. Can be found for under $100
- To build a system that can perform coming/going detection, would need two readers. or 1 + N readers, where N is the number of approachable directions
- Need a writer. Under $100
- Some writers are substantially more expensive. Q: Why the price difference?
- Need a server
- Need an UPS for the server
- Need a deadbolt actuator that can be overridden standard metal key
iButton
Pros
- Rotating keys are available
- Someone must have physical access to the fob to capture the non-rotating key
Cons
- Hands-on access
- 1 wire interface may be fakable with any interface that has the same signal levels (very cheap and easy buttonforging)
- User may forget to log their entry to the area.
- If door is open, no incentive to use key
- Group of people walk in at once
- Someone knocks and has the door opened for them
