I have the TH16 Temperature/Humidity meter. I subscribed as an advanced user, because I am interested in the charts but in eWeLink Cast it does not allow me to check the option. It just appears gray. I already spent 2 hours looking for how to solve it, without success. I would appreciate help
Hello, currently the TH10/TH16 series don’t support chart feature, these devices are special and we are exploring if we can get them to support this feature.
For now the THR316/THR320 series and Temperature&Humidity sensors support this feature.
It has been a struggle to get TH16 working as a switch AND temp sensor. right now I’m using a SONOFF smart switch in combination with a TH16, just to trigger my heating when the roomtemperature goes below a certain degree with possibility to switch the heater on and off manualy.
Now I read that the TH16 does not support the chart feature. I’m not amused and think of it as a bad buy. Unfortunately
Hello, about the Cast, we keep updating and are integrating devices/features one by one, the TH16 is possible to display chart but need some time 
Would love to have the posibility to add NSPannel and SmartWise WiFi smart thermostat, both have a temperature sensor but it cannot be included in the Cast temperature charts 