The IoT platform generates an alarm when it detects that the alarm triggering condition set in a rule is met or the device message reporting rate exceeds the threshold preset on the platform. Pay close attention to the alarms and handle them in a timely manner to ensure the normal device running.
- Rule alarms: If you set the action Report alarms when configuring a device linkage rule and define the alarm properties and severity, the platform reports an alarm when the trigger condition is met. For example, if a smart water meter does not report data for three consecutive days, the platform generates an alarm to notify maintenance personnel of the water meter fault. Maintenance personnel then locate the faulty water meter based on the alarm information and repair it promptly.
- Device flow control alarms: When the platform detects that the number of upstream messages of a device exceeds the threshold, it starts flow control on device messages and reports the alarms listed below.
Device Upstream Message Flow Control Alarm
When the total reporting rate of all device messages in a resource space exceeds the threshold (120 messages per second by default), the platform starts flow control on the NB-IoT devices and generates this alarm. (By default, flow control is disabled.)
CoAP Message Flow Control Alarm for a Single Device
When the number of messages received by the platform from an NB-IoT device in a measurement period exceeds the threshold (300 messages per minute by default), the platform starts flow control on the NB-IoT device and generates this alarm.
High CoAP Message Sending Rate for a Single Device
When the number of requests sent by an NB-IoT device in a measurement period exceeds the threshold (5 messages per second by default), the platform generates this alarm and rejects subsequent requests from the device.
MQTT Message Flow Control for a Single Device
When the volume of data sent by an MQTT device per second exceeds the threshold (3 KB/s by default), the platform starts flow control on the MQTT device and generates this alarm.
- Viewing alarm information
You can use AOM to view alarms generated in the last 30 days.
For details, see "Viewing Alarms".