I read the total energy with a linux shell script :
E=$(curl -s -X POST -d '{"id":1, "method":"Shelly.GetStatus"}' http://192.168.66.187/rpc | jq -M . | grep total | sed s/^.*\ // | sed s/,//)
And I store that value on a local server.
Last night, I get a grid failure, and then I was surprised becaus the total energy value was reset to 0. I had understand the this value was stored in cas of power fail. Did I miss something ?
Thanks for your answer, I have effectively made a relative compact assembly !
I just installed a shelly 2.5 in a case witch include 2 electrical plug, and I am surprised by the temperature value given by the bash command
"curl -s --location --request GET 192.168.66.185'/status' | jq"
it is from 61 celsius to 83 !! is that a possible value or is it anything ? 
By hand, it is warm, but no problem to touch with a finger, and the parameter overtemperature is false.
