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Adopt the EnergyCostUnit documented theory from V2 into V7.

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Victor Chang
2024-06-04 23:51:57 -07:00
parent 54fd1242f7
commit a64563c7fc
1 changed files with 10 additions and 1 deletions
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11
docs/protocol-meter-reading.md
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@@ -104,7 +104,7 @@ Blank cells have never been seen to be anything other than zero. Some cells have
<tr> <th>20</th> <td colspan=1 align="center">~ExportWh</td><td colspan=2></td><td colspan=1 align="center">0x01</td></tr>
<tr> <th>24</th> <td colspan=1 align="center">0x03</td><td colspan=1></td><td colspan=1 align="center">0x22</td><td colspan=1 align="center">0x01</td></tr>
<tr> <th>28</th> <td colspan=2></td><td colspan=1 align="center">0x02</td><td colspan=1 align="center">0x03</td></tr>
<tr> <th>32</th> <td colspan=1></td><td colspan=1 align="center">0x22</td><td colspan=1 align="center">0xE8</td><td colspan=1 align="center">0x03</td></tr>
<tr> <th>32</th> <td colspan=1></td><td colspan=1 align="center">0x22</td><td colspan=2 align="center">EnergyCostUnit</td></tr>
<tr> <th>36</th> <td colspan=1></td><td colspan=1></td><td colspan=1 align="center">0x04</td><td colspan=1></td></tr>
<tr> <th>40</th> <td colspan=1 align="center">0x2A</td><td colspan=3 align="center">PowerVal</td></tr>
</table>
@@ -129,6 +129,15 @@ Bytes 41 and 43 (24 bit signed int, LSB)
The power being sent or consumed at this moment. This is in watts for me but I know in the V2 payload that there is a `MeterDiv`, which means `PowerVal` might be a multiplication of the real wattage. If V7 also has this behavior then `MeterDiv` must have a value of 1 in my readings. So, `MeterDiv` might be byte 2, 13, 23, or 27.
#### EnergyCostUnit(?)
Bytes 34 and 35 LSB
Usually `0xE803`, which is `0x03E8` = `1000`. Continuing the V2 theorization that this is the number of watt-hour units per "cost unit".
Since people are typically charged per kWh, this value is typically 1000.
This value is not currently used in the code.
#### Incrementor
Byte 1 (8 bit unsigned int)