[miele] Error reading extended device state (water/power consumption) after service

[jlaur]

After having my washing machine repaired today this started to show up in logs and water/power consumption was no longer updated:

Unexpected size of extended state: [0, 1, 1, 1, 0, 0, 6, 64, 8, 7, 1, 1, 100, 100, 58, -104, 0, 0, 0, 0, 3, -74, 3, -74, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 106, 0, 0, 0, 0, 0, 0, 0, 2, 0, 6, 126, 108, 0, 8, 0, 0, 0, 0, 0, 0, 2]

In total 67 bytes received for ExtendedDeviceState. The two values for water and power consumption were at the same offsets as usual, but 8 more bytes received at the end.

I don't think any software was upgraded, but the machine was factory reset and some configuration changes were made by the Miele technician.

Expected Behavior

Reading of water and power consumption from machines supporting it should work no matter how much extended device state information is available.

Current Behavior

Validation of number of bytes for ExtendedDeviceState is too strict and assumes same length for all firmware versions/configurations.

Possible Solution

Change validation to check only for number of bytes required for reading values from known offsets.

Steps to Reproduce

Create items for either waterConsumption or powerConsumption and run a program on some affected washing machine.

Your Environment

Washing machine: WMV 960 WPS.