Include uptime_seconds in sendTelemetry and print upon response

Author: ianmcorvidae

meshtastic/mesh_interface.py

@@ -556,6 +556,9 @@ def sendTelemetry(self, destinationId: Union[int,str]=BROADCAST_ADDR, wantRespon
                     air_util_tx = metrics.get("airUtilTx")
                     if air_util_tx is not None:
                         r.device_metrics.air_util_tx = air_util_tx
+                    uptime_seconds = metrics.get("uptimeSeconds")
+                    if uptime_seconds is not None:
+                        r.device_metrics.uptime_seconds = uptime_seconds
 
         if wantResponse:
             onResponse = self.onResponseTelemetry
@@ -591,6 +594,8 @@ def onResponseTelemetry(self, p: dict):
                 )
             if telemetry.device_metrics.air_util_tx is not None:
                 print(f"Transmit air utilization: {telemetry.device_metrics.air_util_tx:.2f}%")
+            if telemetry.device_metrics.uptime_seconds is not None:
+                print(f"Uptime: {telemetry.device_metrics.uptime_seconds} s")
 
         elif p["decoded"]["portnum"] == 'ROUTING_APP':
             if p["decoded"]["routing"]["errorReason"] == 'NO_RESPONSE':