The single use temperature and humidity transmitter TT18 built-in temperature/humidity transmitter and GSM module, need to inset SIM card use. TT18 can wake up only when it is time to send data, or when the user operates it. Other than this, it is in sleep state. So it can be used for a longer time to bring you more convenience.
Temperature and humidity transmitter TT18 can collect high-precision temperature/humidity quickly, and then transmit it to the server software through GPRS. It is widely uesd in the cold chain logistics, medicine storage, refrigeratory and so on.
To set the tracker send the following commands by SMS messages
Set the operator APN
Set the update interval 60 seconds
Set the GPRS server
Activate the GPRS mode