Tweaks to energy sensor and doc changes (#11)

* Graph logic tweak

* Fix native and suggested units for energy

* Doc changes

README.md

@@ -4,7 +4,11 @@ A basic integration for interacting with Ohme EV Chargers.
 
 This is an unofficial integration. I have no affiliation with Ohme besides owning one of their EV chargers.
 
-This has only be tested with an Ohme Home Pro and does not currently support social login or accounts with multiple chargers.
+This integration does not currently support social login or accounts with multiple chargers. It has been tested with the following hardware:
+* Ohme Home Pro [UK]
+* Ohme Home/Go [UK]
+
+If you find any bugs or would like to request a feature, please open an issue.
 
 ## Entities
 This integration exposes the following entities:

custom_components/ohme/sensor.py

@@ -76,7 +76,9 @@ def native_value(self):
 class EnergyUsageSensor(CoordinatorEntity[OhmeStatisticsCoordinator], SensorEntity):
     """Sensor for total energy usage."""
     _attr_name = "Accumulative Energy Usage"
-    _attr_native_unit_of_measurement = UnitOfEnergy.KILO_WATT_HOUR
+    _attr_native_unit_of_measurement = UnitOfEnergy.WATT_HOUR
+    _attr_suggested_unit_of_measurement = UnitOfEnergy.KILO_WATT_HOUR
+    _attr_suggested_display_precision = 1
     _attr_device_class = SensorDeviceClass.ENERGY
 
     def __init__(
@@ -111,7 +113,7 @@ def icon(self):
     def native_value(self):
         """Get value from data returned from API by coordinator"""
         if self.coordinator.data and self.coordinator.data['energyChargedTotalWh']:
-            return self.coordinator.data['energyChargedTotalWh'] / 1000
+            return self.coordinator.data['energyChargedTotalWh']
 
         return None
 

custom_components/ohme/utils.py

@@ -29,7 +29,7 @@ def charge_graph_next_slot(charge_start, points):
         # If the next point has a Y delta of 10+, consider this the start of a slot
         # This should be 0+ but I had some strange results in testing... revisit
         if delta > 10:
-            next_ts = data[idx]["t"]
+            next_ts = data[idx]["t"] + 1 # 1s added here as it otherwise often rounds down to xx:59:59
             break
 
     # This needs to be presented with tzinfo or Home Assistant will reject it