Configuration Details

The parameters in the configuration file are shown below:

Table 1.
Field	Type	Required	Default
listenTopic	String	Yes
publishTopic	String	Yes
tags	Object	Yes
log_level	String	No	off
clientid	String	Yes
qos	Integer	No

`listenTopic`

The listenTopic field determines the MQTT topic on which this app listens for incoming data.

`publishTopic`

The publishTopic field determines the MQTT topic on which this app publishes the filtered data.

`tags`

The tags field defines the variables on which deadband is to be applied. The tags is an object of the following structure.

Table 2.
Field	Type	Required
<variable name 1>	String	Yes
<variable name 2>	String	No
...	String	No

The fields <variable name 1>, <variable name 2>, etc. represent individual variable names for which the values are objects that have the deadband details below.

Table 3.
Field	Type	Required
type	String	Yes
value	Any numeric	Yes
timeoutInMS	Integer	Yes

type determines the type of deadband; possible values are absolute and percent

value is the deadband value to be used
timeoutInMS is the timeout value (in milliseconds) to be used during deadband calculation

`log_level`

For details about the log_level and log_name fields, see the Generic CDP Blocks section of the Protocol Adapters documentation page.

`clientid`

The clientid is used to specify the name of the client in the MQTT client options. It can be any unique string.

`qos`

The qos field is used to specify the qos (quality of service) to the MQTT client during publishing.