libraries/Matter: Add MatterPowerSource.h and battery reporting example

[LorbusChris]

I thought I'd share this fun little project here. It's a momentary Matter switch with battery reporting (Thing plus Matter inside).

This is really just intended as a reference, so feel free to close this out without pulling the code in. Feedback is appreciated! :)

[lboue]

I love the idea! Can't wait to test this.

[LorbusChris]

Home Assistant works well (as pictured above), Apple Home however doesn't seem to recognize the PowerSource cluster.

[silabs-bozont]

@LorbusChris this is AWESOME! Once we start with the community contributions this is going to be the first PR merged 🚀

[lboue]

@LorbusChris

I've just done the test. I've noticed a issue with the PowerSource cluster.

It is presented on EP4 instead of EP3. Apple Home shows power source icon.

Could you fix it?

Regards

[lboue]

To compare, here's how it looks for an EVE motion sensor

[lboue]

I think the following attributes can be activated in our case:

• 0x0002 Description CHAR_STRING
• 0x0009 WiredPresent BOOLEAN
• 0x000B BatVoltage Server INT32U
• 0x000C BatPercentRemaining INT8U
• 0x000E BatChargeLevel BATCHARGELEVELENUM
• 0x0014 BatCommonDesignation BATCOMMONDESIGNATIONENUM
• 0x0015 BatANSIDesignation CHAR_STRING
• 0x0016 BatIECDesignation CHAR_STRING
• 0x0019 BatQuantity INT8U
• 0x001A BatChargeState BATCHARGESTATEENUM

Source: power-source-cluster.xml

We could:

1. Change the value of the 0x0009 WiredPresent attribute when the battery is charging
2. Indicate the battery type

Regards