The mqtt_subscribe node
Subscribe to an mqtt-broker and get data from one or more topics.
Example
|mqtt_subscribe()
.topics('top/grips/#')
.dt_field('UTC-Stamp')
.dt_format('float_micro')
Parameters
| Parameter | Description | Default |
|---|---|---|
host( string ) |
Ip address or hostname of the broker | from config |
port( integer ) |
The broker's port | 1883 from config |
user( string ) |
username | from config |
pass( string ) |
password | from config |
client_id( string ) |
mqtt client id, defaults to a combination of flow-id and node-id | undefined |
topics( string_list ) |
mqtt topic(s) to use | undefined |
topic( string ) |
mqtt topic to use | undefined |
qos( integer ) |
Quality of service, one of 0, 1 or 2 | 1 |
dt_field( string ) |
name of the timestamp field that is expected | 'ts' |
dt_format( string ) |
timestamp or datetime format that is expected (see datetime-parsing) | 'millisecond' |
include_topic ( bool ) |
whether to include the mqtt-topic in the resulting datapoints | true |
topic_as ( string ) |
if include_topic is true, this will be the fieldname for the mqtt-topic value |
'topic' |
as ( string ) |
base object for the output data-point | undefined |
| ssl( is_set ) | whether to use ssl | false (not set) |
One of
topic,topicsmust be specified.