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Landis+Gyr GridStream Protocol (view source)
Revision as of 00:32, 6 March 2021
, 00:32, 6 March 2021→Checksum
====Sync and Header====
----The sync word that the Landis+Gyr smart meters send is shown below, this can be used in GNU Radio or other tools to receive only packets transmitted by the meters. Note that at the start of the header we begin using start and stop bits. These must be stripped off of the rest of the data packet during processing.
{| class="wikitable"
|+Sync and Header
----<br />
====Type, Length and Sub Type====
----Add So far only two types of packets have been observed, a 0x55 and a 0xD5 packet. Multiple lengths and SubTypes of these are listed below.{| class="wikitable"|+!!Type!SubType!Length!Packets Purpose|-!1|0x55|0x30|0x0023|Report up-time and other unknown data here|-!2|0x55|0x30|0x0028||-! colspan="4" |!|-!3|0xD5|0x21|0x0016||-!4|0xD5|0x21|0x0017||-! colspan="4" |!|-!5|0xD5|0x29|0x0016||-!6|0xD5|0x29|0x0017||-! colspan="4" |!|-!7|0xD5|0x51|0x0047||-!8|0xD5|0xC0|0x00FD||}
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====Checksum====
----Add data here----<br />
===Captured Meter Data===
There have been two packet types observed thus far, a 0x55 and a 0xD5 packet.