Mqtt Protocol - ICP DAS USA PMC-523 Series User Manual

ICP DAS PMC-523x/PMC-224x/PMD Series User Manual
Appendix VI：Change the value of output channel of module or
Internal Register by MQTT protocol
PMC/PMD supports the MQTT protocol. User can use it to change the value of the
Internal Register of PMC/PMD or the value of the output channel of I/O module or
power meter module which connect to PMC/PMD. Based on MQTT, user just needs
to publish the specific topics to Broker, and PMC/PMD will automatically subscribe
and receive the specific topics to complete the action. Following will list the format
of Public topic to the related output channel of module and Internal Register.
 DO channel of ICP DAS XV-Board
Prefix/SET/xvboard/do/channel_no
Topic
Message 0 or 1
 AO channel of ICP DAS XV-Board
Prefix/SET/xvboard/ao/channel_no
Topic
Message Floating value
 The DO channel of ICP DAS I/O module or power meter module
Prefix/SET/interface/module_no/do/channel_no
Topic
Message 0 or 1
Prefix Please refer to
channel_no 0~15
Prefix Please refer to
channel_no 0~15
Prefix Please refer to
interface com3, com4 or lan
module_no 1~16
channel_no 0~15
9.3 MQTT Setting
9.3 MQTT Setting
9.3 MQTT Setting
322