Alarm Contact

[Pesticida]

Hi,
This is a very good Idea Luciano with Master and Slave ,
did you know where can I find Schemas about RS-485.

Bye Pesti.

[Luciano]

Do a search on this forum for "RS-485" or "RS485".

Luciano

[Pesticida]

Hi,
I found this schema I think this is ok?
Have anybody experience with RS 485 connections.

The Alarm Contact with the two resistors like on my Alarm Box works just fine.
I have now three states:Alarm,Normal,Sabotage.
Thanks People for the help!!!

I made that my Visual Basic Software send every second data to PIC and back,the Software saves the data (Contact States+Date+Time) on one file and then the Software read the data from the file and shown on the GUI,when the State is Normal I can reset the Alarm, and so on.
All is working very good but I must to expand the capability.
For the moment I can adjust the time interval,map load,save the Contact coordinates on the map,text for the contacts,pictures for the contacts,Port adjustment,Sound on Alarm.
I want to made this what Luciano mean with Master und Slave,any Slave Pic have a ID Adress and so on,I can adjust the adress with DIP switch.

Regard Pesti.