The Goal
- Monitor digital and analog inputs for out-of-tolerance conditions
- Send a SMS text message to the administrator when things break
- Allow the administrator to remotely solve the problem by controlling the digital outputs over SMS
"Phidgets" 8x8x8 Interface Kit
- Tiny USB remote I/O device
- 8 analog inputs / 8 digital inputs / 8 digital outputs
- TTL (+4,2v / Gnd) levels for all connections
- Connects to other analog and digital controls (shown above)
Ericsson T39 Mobile Phone
- Older Device - Circa 2001
- Common GSM phone, well-known (but more difficult) command set
- Serial data cable for it is readily available