Historian Topic Syntax

Historian Topic Syntax

Each historian will subscribe to the following message bus topics (actuator/, anaylsis/, record/* and devices/*). For each of these topics there is a different message syntax that must be adhered to in order for the correct interpretation of the data being specified.

devices/*

The devices topic is meant to be data structured from a scraping of a ModBus or BacNet device. Currently there are drivers for both of these protocols write data to the message bus in the proper format. The format they write to is as follows:

# Header
{
    # python code to get this is
    # from datetime import datetime
    # from volttron.platform.messaging import headers as header_mod
    # {
    #     headers_mod.DATE: datetime.utcnow().isoformat(' ') + 'Z'
    # }
    "Date": "2015-11-17T21:24:10.189393Z"
}

# All message
{
    
}