@David-TP I have upgraded M5 firmware manually to version 1.9.0, although E4R still dropped out and amber light on, image below. The upper one is the E4R in problem, the lower one is another E4R that...

@David-TP thanks. This E4R was the primary and additional E4s the satellite (no other deeco models in the mesh). That mesh worked without problem for about 1 year. Recently replaced this E4R primary...

Use M5 as the primary, E4 the single mesh node. The mesh system worked for about 24 hrs then E4 became disconnected, solid amber light on. Restarting E4 helped get it connected and worked for about...