Advantech WISE-4470 Series, User Manual

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WISE-4471 User Manual 48
A.2 iSensing MQTT Format for subscribing
A.2.1 Topic Format: Advantech/MAC_Address/ctl/doIndex
These topics are used to control the digital outputs on the sensors that support them.
These requests need to be published to the broker handling the Sensor network.
A.2.2 Payload Format
WISE-4471-S214
(4-AI, 4-DI)
{"s":1,
"t":"2014-07-11T15:26:37Z",
"q":192,"c":1,
"ai1":-1.234567,
"ai_st1":1,
"ai2":-123.4567,
"ai_st1":2
"di1":false,"di2":true }
 The value of the sensor in
engineering units if ai disable
the value is 9999.9999
"ai_st": AI status number meaning:
0, AI Channel disable
1, Streaming
2, High latch
3, High momentary
4, Low latch
5, Low momentary
The value of di1 and di2 can be:
false, true.
Note! The channel number on WISE module is "0" based, and the channel
number of MQTT topic is "1" based. For example: "DO0" of WISE mod-
ule use topic "do1"
Field Description
Advantech Vendor of WISE Series
MAC_Address MAC address of WISE Series
doIndex The index of the DO channel. Note that the index start with '1'
Note! The channel number on WISE module is "0" based, and the channel
number of MQTT topic is "1" based. For example: "DO0" of WISE mod-
ule use topic "do1"
JSON data Description
{"v":true} Setup the DO Boolean value as true
{"v":false} Setup the DO Boolean value as false
Note! While sending control MQTT command, do not set the retain bit when
publishing messages to this topic; otherwise, an old retained message
may change the state of the output.