Looking for an electronics person who can build a modem based device. Here is what it needs to do.
A device that can be manually programmed like 8 dip switches to identify itself. Needs to measure 4 external contacts, these can be switches controlled by external devices but for this requirement we plan to test using light diodes looking for a break in one of four connections. There would only be one break at a time of a set of four.
Need to sample all four once, once an hour and store the data for 24 hours or 24 samplings. We also need this to be connected to a line powered modem that can be set on a timer and dial a preprogrammed number (we need to be able to program the number ourselves, again maybe simple dip switches) and deliver the devices identification and the last 24 readings. The receiver, a small application, preferably written in VB.NET that reads incoming data and stores it in a simple data table MS Access would be good. The receiver application could then verify it has read the units ID and the 24 data readings, and then send a reset that would clear the devices memory. This would allow the device to require very little memory.
Because of the simple design and available ICs we feel it may be possible to build this so it can run off the Telco power. What we are looking for is someone to breadboard this, put it in a simple project box, and provide detailed schematics, an explanation of how it works, operational specs and manuals.
It does not have to look pretty, just work. Once we accept offer, we hope to have working model in 4 weeks or less. We will pay in full when we receive the device and test it against our requirements. If all goes well we may be looking for more small similar projects and possibly upgrades to this one.