Temperature alarm

Buy a simple temperature recorder with alarm, which can not only measure the temperature, but also record the historical data of the temperature. Aren't you afraid that the temperature is too high when people are not around? Equipped with SMS alarm, that is, set the upper and lower temperature limits of the recorder. When it exceeds the standard, SMS alarm will send alarm information to your mobile phone. Of course, if it is not too far away from the scene, you can match a audible and visual alarm (similar to the sound and brightness of a warning light). You can ask me QQ 1057268 14 if you have any questions.