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Update protocol.md

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Joe Rouvier
2022-09-05 18:24:16 -07:00
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@@ -40,18 +40,7 @@ The mac address reponse bytes are in reverse order, if the device responds with
`88:77:66:55:44:33:22:11`
#### Install code response payload
The install code bytes are also swapped, see mac address response above
The install code bytes are not swapped like the mac address payload.
#### Meter reading response payload
| Bytes | Meaning |
| ----- | ------- |
| 0 - 3 | Unknown, usually zeros |
| 4 - 7 | Watt hours consumed. Sometimes an invalid number greater than `0x0040 0000` is returned, which is not well understood |
| 8 - 43 | Unknown, seems to always be zeros |
| 44 - 47 | Unknown, seems to typically be `0x0000 0001` |
| 48 - 51 | Potentially a Watt-Hour to kWh divisor, typically `0x0000 0x03E8` (1000) |
| 52 - 55 | Unknown, typically `0xfbfb 0000` |
| 56 - 59 | Watts being consumed right now. Bit 24 being high (`0x0080 0000`) indicates a negative number, Sometimes data is missing, indicated by negative zero, exactly `0x0080 0000` |
| 60 - 147 | Unknown, usually zeros |
| 148 - 151 | Time since the watt-hour value was reset to zero in ms as a big endian number |
The meter response payload has it's own page [protocol-meter-reading.md](protocol-meter-reading.md)