Data transfer to Arduino by SIP protocol
I like to use an Arduino controlled by any phone, connected to a VoIP pbx, to display numeric messages on a 4 digit display
The purpose of this project is to get the attention of an individual in a very noise environment with no radio transmission possible. The first two digits are the id of the person for who the message is and the second two digits are a code for the specific task that the person has to perform.
First step calling the Arduino:
I want to be able to dial a certain number from a phone and make connection through the PBX with the Arduino. In my idea the SIP protocol can be used to transfer small packages of data to the Arduino.
Second step entering message:
By using the keys on the phone to enter a code like **5#3456# displaying 3456.
Third step is confirmation that the message is received. My idea for that is using a phone and dial a short code to indicate the task is done.
Controlling a display is not difficult, I am looking for some experience to use the SIP protocol as datatransfer method.
