Excuse me, which god has circuit diagram, simulation, program, etc. Temperature alarm, the more detailed, the better; 547827077

The temperature sensor is used to collect the ambient temperature. When the temperature reaches the set temperature, it generates an alarm signal, and the SMS alarm is realized through the GSM module. You can set the alarm temperature and alarm phone number. The content of short messages can also be edited. Additional DS 1302.

Hardware part:

AT89S52+TC35+DS18B20+12864 LCD+infrared remote control +DS 1302.

It's not the same as the single chip microcomputer you use, so you can probably refer to it. You should be able to find it by searching for "DIY, GSM temperature alarm system made by 5 1 single chip microcomputer" at the above address. I hope it works for you. ...