Hello all. I am new to arduino but an expert in electronics diagnosis,trouble shooting and repair. I want to make a burglar proof or alert system. I will need sensors on doors and locks and when a person touches them, information is sent to an arduino board then,the board communicates to a phone so that the owner knows there is an intruder or someone at the door. I need to know what i should use and also whether i need a phone application for communication between the phone and the arduino which i would want to avoid. I would be happy if a phone can communicate directly with a phone.
sounds like you will have this running easily. I like the recent discussions of the knock sensors. that way if someone sees one of those internet doorbells, they could knock on the door and bypass the bell to find if you are at home or at some remote location.
the knock sensor adds that second layer to the presence sensor at the front door.
as for POTS , to tie into a plain old telephone system, you have to use certified equipment. MaBell does not allow experimenters to tie into the hard wires just randomly.
There are lots of auto-dialers that can establish the call, then once the call is connected, you can send all the data you like. you can control the timing of the auto-dialer, most only need you to close contacts (or open them).
you could get a cheap phone, lift the handset then play tones to dial. that sort of thing.
of course, you need to answer the other end.
but i need info sent as text.
Have you considered using the Arduino GSM shield? This will allow you to programmatically send texts through your Arduino system and comes with a library that will allow you quickly get up and running.
Thanks shaktal. so, if i get the gsm shield, then its possible for sensors to communicate to an arduino then,the arduino communicates to the shield and finally the shield communicates to a phone?
eddyedu9:
Thanks shaktal. so, if i get the gsm shield, then its possible for sensors to communicate to an arduino then,the arduino communicates to the shield and finally the shield communicates to a phone?
Yes, in essence this is how you will design your system. Remember, that you will need a SIM card with credit that is valid on a mobile network in the country you are using the system.
eddyedu9:
but i need info sent as text.
unless you have some transporter that will re-materialize a piece of paper on the other end, every electronical device that uses digital sends electronical bits as 0's and 1's hence the word digital.
your keyboard sends 0's and 1's to your processor that displays them as ASCII characters or just pictures on the screen.
Besides the GSM shield, you might consider using a wireless module. I can send text messages to my phone by sending an email to ATT. Both ATT and Verizon have this capability, but I don't know how many other carriers provide something similar.
There is an Email server, SMTPT2Go, which will provide a free service of up to 20 emails a day. If you google about a bit, you'll find the relevant code.