Detect charging cable unplugged from car

[Benny-Git]

Automagically opening the garage when the charging cable is unplugged at home would be helpful.

Somebody requested a sensor in issue 134 on the HA integration, linking this: https://github.com/mercedes-benz/MBSDK-CarKit-iOS/blob/cbe02fc1322a6e7278b5ad1a3faafde2f36177c4/MBCarKit/MBCarKit/Common/Enums/Status/ZEVTypes.swift#L93

Right now with the cable plugged in but the car not charging, the sensor is in state 8 however -- which is not documented.

Steps taken: created a sensor to pull out the Chargingstatus attribute from _range_electric.

[Benny-Git]

Observing the charging with evcc, the Chargingstatus switches between 0 and 8, with one short switch in between to 4.

According to the source linked above:

0 = charging
4 = failure
8 = ?

[Benny-Git]

// Charging Status
// 0=CHARGING
// 1=CHARGING_ENDS
// 2=CHARGE_BREAK
// 3=UNPLUGGED
// 4=FAILURE
// 5=SLOW
// 6=FAST
// 7=DISCHARGING
// 8=NO_CHARGING
// 9=SLOW_CHARGING_AFTER_REACHING_TRIP_TARGET
// 10=CHARGING_AFTER_REACHING_TRIP_TARGET
// 11=FAST_CHARGING_AFTER_REACHING_TRIP_TARGET
// 12=UNKNOWN

func MapChargeStatus(lookup int) api.ChargeStatus {
	switch lookup {
	case 0, 5, 6, 9, 10, 11:
		return api.StatusC
	case 1, 2, 4, 7, 8:
		return api.StatusB
	}
	return api.StatusA
}

Source: https://community.home-assistant.io/t/mercedes-me-component/41911/2468