8 AWS IoT Services
8.1 Device Defender
ExpressLink devices support the AWS IoT Device Defender service. They can publish a basic set of metrics to IoT Core at a configurable interval, including:
ExpressLink Custom Metric |
Type |
Description |
|---|---|---|
Bytes Out |
Count |
Number of bytes sent since last update. |
Messages sent |
Count |
Number of messages sent since last update. |
Messages received |
Count |
Number of messages received since last update. |
Hard Reset Event |
Flag |
Set to 1 if a hardware reset occurred since last update. |
Reconnect Events |
Flag |
Set to 1 if a reconnect occurred since last update. |
Flash Memory Writes |
Count |
Number of writes to flash memory since last update. |
All ExpressLink custom metrics are volatile in nature, as their values are reset to 0 after each periodic update (or set to 1 upon a device reset/reboot for the specific events).
The device defender feature is activated by setting the Defender configuration parameter to a value greater than 0 in the configuration dictionary (using the AT+CONF command).
The Defender parameter value is used to indicate the number of seconds between successive updates of the Device Defender metrics.
The Defender parameter is non-volatile so that an ExpressLink device resumes sending Device Defender metrics at the rate to which it was configured after any reset (soft command or hardware).
Examples:
AT+CONF Defender=0 # Device Defender metrics are disabled
NOTE: This is the initialized value after a factory reset (see Table 2 - Configuration Dictionary Persistent Keys ).
AT+CONF Defender=60 # Device Defender metrics will be sent every minute AT+CONF Defender=3600 # Device Defender metrics will be sent every hour
8.1.1 DEFENDER: {not implemented in this version}
The DEFENDER command is reserved for use with the AWS IoT Device defender service.
8.2 AWS IoT Device Shadow
8.2.1 SHADOW: {not implemented in this version}
The SHADOW command is reserved for the support of the Device Shadow service.
8.3 AWS IoT JOBS
8.3.1 JOB: {not implemented in this version}
The JOB command is reserved for the support of the AWS IoT Jobs service.
