Problem with multiple SRT321 Thermostats

[johndoe]

Hello,

I have 5 SRT321 thermostats to set the temperature of 5 separate zones.

Except for the value of the setpoint, they are all set in the same way (T ° Delta = 10 and Wake-up interval = 900).

I use Domoticz build ...
Version: 3.8153
Build Hash: 494fff7

... and shoot on a dedicated RPI 2. There is only one Z-Wave controller (Everspring SA413).
The RPI is physically positioned in the center of the housing (max 5m from each of the SRT). No communication concerns (Mesh OK). My controller is not connected directly to the RPI (I use a USB cable of approx 50cm)

My concern: After 1 day, the change of instructions made by domoticz only works on 4 thermostats. There is always one that does not update. For it to be, I have to wake it manually or restart domoticz.
Then everything works again for 1 day. Then the problem occurs at another SRT. In short, they do it in turn!

There is nothing in the log: '(

I wonder if this does not come from the fact that the RPI reaches any treatment limit? Or the Everspring controller?

An idea ? a track ?

Thank you