Since 2017 I have been designing and manufacturing wifi thermometers, heat-hygrometers, heat-hygrometer-pressure gauges and thermostats. I also offer wifi battery thermometers with a battery life of over one year. The application allows you to view temperature graphs for the last hour, day or week. It is also possible to set up automatic SMS sending when the temperature drops below a certain limit or if a certain temperature is exceeded. For most wifi thermometers, you can also set values to be sent to the cloud so you don't depend on my server. Of course there is temperature monitoring from anywhere in the world via the Internet. Mgr. Zdeněk Macura