@andreacioni
Here is the output generated after restarting the TimeAwareSensor sketch from the MySensors examples.
You can see that the I_TIME (3;0;1) message is received by the gateway several times, but it never sends a response to the node.
Do you need anything else?
12:20:59.677 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;Starting gateway (RNNGA-, 2.0.0-beta)
12:20:59.683 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;Radio init successful.
12:20:59.683 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;14;Gateway startup complete.
12:20:59.683 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;Init complete, id=0, parent=0, distance=0
12:20:59.683 [INFO ] [me.event.ThingStatusInfoChangedEvent] - 'mysensors:bridge-ser:2dc775c4' changed from INITIALIZING to ONLINE
12:20:59.776 [DEBUG] [g.mysensors.protocol.MySensorsWriter] - Sending to MySensors: 0;0;3;0;2;
12:20:59.782 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;2;2.0.0-beta
12:20:59.782 [DEBUG] [s.internal.MySensorsBridgeConnection] - Good,Gateway is up and running! (Ver:2.0.0-beta)
12:21:01.067 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=1,pt=0,l=0,sg=0:
12:21:01.071 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 167;255;3;0;1;
12:21:01.076 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=15,pt=0,l=2,sg=0:
12:21:01.119 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;send: 0-0-167-167 s=255,c=3,t=15,pt=0,l=2,sg=0,st=fail:
12:21:01.125 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=0,t=17,pt=0,l=10,sg=0:2.0.0-beta
12:21:01.128 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 167;255;0;0;17;2.0.0-beta
12:21:01.131 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=6,pt=1,l=1,sg=0:0
12:21:01.134 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 167;255;3;0;6;0
12:21:03.135 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=11,pt=0,l=5,sg=0:Clock
12:21:03.138 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 167;255;3;0;11;Clock
12:21:03.144 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=12,pt=0,l=3,sg=0:1.0
12:21:03.146 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 167;255;3;0;12;1.0
12:21:11.059 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=1,pt=0,l=0,sg=0:
12:21:11.061 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 167;255;3;0;1;
12:21:21.061 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=1,pt=0,l=0,sg=0:
12:21:21.063 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 167;255;3;0;1;
12:21:31.063 [DEBUG] [g.mysensors.protocol.MySensorsReader] - 0;255;3;0;9;read: 167-167-0 s=255,c=3,t=1,pt=0,l=0,sg=0: