Hi all. I'm thinking about use a Arduino framework to build up my domestic antitefth system... and probably to produce a new Arduino board that could be useful to the Community.
Here is a quick note of my ideas:
- Some "free" digital input/output pins and some relays on board. The input/output could be used to read window sensors and for tamper limes; It could be also used to read shutters position; A relay could be used to drive an acustic alarm, to move up/down shutters and/or turn on/off lights and so on.
- A 485 transceiver onboard. This wil be used to connect to other nodes and to the "master" node (that could be implemented by a standard Arduino/Netduino or whathever with a RS485 shield). I would like to power the board through the 485 connector.
- Compatible with most of the shields already present on the market
- The smallest possible... best would be if it could be fitted in a standard 503 box.
- Atmel onboard
- Connector for external programmer (the same used on Arduino Ethernet). I think is the best solution to save some money if a lot of units are placed in a house because the same programmer could be used for more than a unit
My idea is to have one unit for each window pairs.
I've attached a screenshot of what I'm proposing. On the board is a Atmel 328, some logic, an I2C extender. The latter was added to save the I/O pins fom Atmel so it will be possible to use them for the normal shields.
Suggestions? Opinions?
Thanks!