This application note demonstrates how to make a simple system that monitors temperature and analog voltages remotely. On meeting certain alarm conditions, the system can send SMS messages, which are then converted to E-mail and forwarded to the designated E-mail address.
1. PIC® microcontroller (PIC 16F877)
2. 1-Wire® temperature sensor (DS18S20)
3. 8-channel 12-bit, serial A/D converter (MAX127)
4. GSM modem
5. SMS to E-mail conversion service provided by TynTec