Serial Port Poll Message Format - SMART System

SMART System User Guide (Latest Software Version)

Core Product
SMART System
Accessory
SMART Software Version
1.3.9

Poll messages are output at regular intervals. These contain an optional text string and status information about the SMART System.

Optional Leading String

Each poll message may begin with a static string, entered into the Prepend to Poll Line field on the Serial Output tab. By default, this string is empty.

Poll Fields

After the optional leading string, each poll message consists of any enabled status fields, separated by commas.

Name Format or Unit Definition
Date YYYY-MM-DD Date of the poll message.
Time hh:mm:ss Time of the poll message.
Disk Usage % How much of the SMART Controller's internal storage is in use.
Events   Number of event messages generated since the previous poll message.
Voltage V The SMART Controller's measured power supply voltage.
CRC7 two hexadecimal characters Optional checksum.

Optional Terminating String

Each poll message may end with a static string, entered into the End Poll Line With field on the Serial Output tab. By default, this string is \r\n, corresponding to a Carriage Return followed by a Line Feed.

Serial Port Poll Message

In this example, the prepending string is set to POLL.

POLL,2024-11-05,13:24:31,35.0,0,12.05,4F
Field Name Example Value
Leading String POLL
Date 2024-11-05
Time 13:24:31
Disk Usage 35.0 %
Events 0
Voltage 12.05 V
CRC7 4F