Introduction - If you have any usage issues, please Google them yourself
Based on this reading of SMS Siemens GSM module process development board written DS18B20 sensor hardware added. Software: read message " H: ... L: ..." to set the upper limit after the alarm temperature. SMS read " DS: ..." to the system set up to send text messages from time to time time. Read " 1234" will be saved to the SIM number number 1. Read " 8888" will number into the SIM number.