feat: EV Charger / EVSE (0x0099)

[simons-plugins]

What

Add an EVSEHandler for the Matter Energy EVSE cluster (0x0099). This enables Matter-enabled EV charging stations (Wallbox, EVBox, Ohme, Easee, Zappi) to appear as Indigo devices.

Matter details

• Cluster 0x0099 — Energy EVSE (Electric Vehicle Supply Equipment), introduced Matter 1.2
• Key attributes:
  • State (0x0000): NotPluggedIn, PluggedInNoDemand, PluggedInDemand, PluggedInCharging, PluggedInDischarging, SessionEnding, Fault
  • SupplyState (0x0001): Disabled, ChargingEnabled, DischargingEnabled, DisabledError, DisabledDiagnostics
  • SessionDuration (0x0006), SessionEnergyCharged (0x0007), SessionEnergyDischarged (0x0008, V2G only)
  • MinimumChargeCurrent / MaximumChargeCurrent (0x0003/0x0004, mA)
• Commands: EnableCharging {minimumChargeCurrent, maximumChargeCurrent, chargingEnabledUntil}, Disable, StartDiagnostics
• Often co-located with ElectricalPower (0x0098) + ElectricalEnergy (0x0091) for live power/energy

Proposed Indigo mapping

• Device type: matterEVCharger — custom device
• States: chargerState (string label from State), supplyState, sessionEnergyKWh, chargingCurrentAmps
• onOffState = True when SupplyState == ChargingEnabled
• Actions: Enable Charging (with optional max current), Disable
• Merges with co-located ElectricalPower/Energy via existing handlers (no change needed there)

Why now

EVSE is in the top tier of Matter 1.2/1.3 device categories. UK/EU EV adoption makes this increasingly common in Indigo households. Ohme and Zappi both have Matter roadmaps.

[simons-plugins]

Composition note from the 2026-07-05 cluster-coverage audit: Matter's EVSE device type composes a dedicated Electrical Sensor (0x0510) endpoint (0x0090/0x0091) separate from the EnergyEVSE (0x0099) control endpoint — the exact split-endpoint shape PR #80 handles. Once #80 lands, an EVSE's metering endpoint resolves cleanly (standalone matterEnergyMeter fallback, since the control endpoint isn't a meter-capable actuator type), and the control endpoint correctly becomes a matterUnknown placeholder. So this issue's remaining scope is charge control (start/stop, current limit) via an EnergyEVSE handler — the energy readings come for free.

🤖 Generated with Claude Code