I've got some Fibaro Motion Sensors (FGMS-001) which I use, among other things, for heating and lighting automation. Normally everything works as it should but, now and then, I observe unexpected behaviors, like lights staying on despite no motion occurring around the relevant sensors. This just happened last night, so this morning I tried to track the problem. I found out that, for one particular sensor, which was working fine before the incident and worked fine afterwards, a "status update is off" message was missing. It should have been received some 30 seconds (this is the value of Z-wave parameter 6. Motion detection - alarm cancellation delay) after last motion was detected.
These are the log entries for this sensor:
2019-01-04 20:40:19.081 Z-Wave received "Escalera Planta Alta Presencia" status update is on <--- Motion detected
2019-01-04 20:40:49.873 Z-Wave received "Escalera Planta Alta Presencia" status update is off <--- Some 30 seconds later, motion alarm is cancelled
2019-01-04 20:54:28.740 Z-Wave received "Escalera Planta Alta Presencia" status update is on <--- Motion detected
2019-01-04 20:54:59.710 Z-Wave received "Escalera Planta Alta Presencia" status update is off <--- Some 30 seconds later, motion alarm is cancelled
2019-01-04 22:33:09.069 Z-Wave received "Escalera Planta Alta Presencia" status update is on <--- Motion detected
<--- There should have been an alarm cancellation message, but there was none
2019-01-05 06:40:56.297 Z-Wave received "Escalera Planta Alta Presencia" status update is on <--- Motion detected
2019-01-05 06:41:27.141 Z-Wave received "Escalera Planta Alta Presencia" status update is off <--- Some 30 seconds later, motion alarm is cancelled
2019-01-05 06:41:57.986 Z-Wave received "Escalera Planta Alta Presencia" status update is on <--- Motion detected
2019-01-05 06:42:28.626 Z-Wave received "Escalera Planta Alta Presencia" status update is off <--- Some 30 seconds later, motion alarm is cancelled
I don't know whether the missing message was not sent by the sensor, or it was missed by the Z-wave interface, or was not processed by Indigo but, in any case, this makes my lighting and heating scenes unreliable. Any idea for the cause of the problem might be ?
I'm attaching a screenshot of the device configuration form.