Landis+Gyr GridStream Protocol: Difference between revisions
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Commentary on the data fields above, they have been grouped based on sample analysis but this could be wrong. If you see a new pattern not noticed before you may be correct. | Commentary on the data fields above, they have been grouped based on sample analysis but this could be wrong. If you see a new pattern not noticed before you may be correct. | ||
* Field 5 - Never observed a packet with this length and subtype that wasn't all FF's | *Field 5 - Never observed a packet with this length and subtype that wasn't all FF's | ||
* Field 6 - Have only seen this change when comparing data from different energy providers | *Field 6 - Have only seen this change when comparing data from different energy providers | ||
* Field 7 - Appears to either be location identifier (Oncor) or duplicate meter ID (Coserv) | *Field 7 - Appears to either be location identifier (Oncor) or duplicate meter ID (Coserv) | ||
* Field 9 - Increments some amount with each transmission and rolls over at 0xFF | *Field 9 - Increments some amount with each transmission and rolls over at 0xFF | ||
* Field 10 - Value in seconds since meter powered on, '''easy way to see last time the meter experienced a power outage.''' | *Field 10 - Value in seconds since meter powered on, '''easy way to see last time the meter experienced a power outage.''' | ||
* Field 15 - This value counts from near 0 to around 3FFF and rolls over, not sure what it is. Have not been able to correlate the counting value or speed vs time to any sort of power utilization. | *Field 15 - This value counts from near 0 to around 3FFF and rolls over, not sure what it is. Have not been able to correlate the counting value or speed vs time to any sort of power utilization. | ||
{| class="wikitable" | {| class="wikitable" | ||
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====0xD5 Meter Data==== | ====0xD5 Meter Data==== | ||
There appear to be multiple packet lengths and styles for the 0xD5 packet. | There appear to be multiple packet lengths and styles for the 0xD5 packet. Some samples shown below. | ||
{| class="wikitable" | {| class="wikitable" | ||
|+0xD5 Captured packet | |+0xD5 Captured packet | ||
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|00 | |00 | ||
|} | |} | ||