Update hass_mqtt.py (jblance#299)

Sadly Home Assistant only recognises binary sensor states, if they are "ON" or "OFF" (case sensitive). 🤦🏻‍♂️
So there's also the need of changing the values for export.
And also sadly the if condition differs "0" from QPIWS and 0 from QPIGS.
For the QPIWS warnings I cannot see an universal conditon. Maybe you can somehow use the command to include it also in the if. For me I added the tag from mpp-solar.conf section:
if unit == "bool" or value == "enabled" or value == "disabled" or tag == "myQPIWStag":

mppsolar/outputs/hass_mqtt.py

@@ -52,14 +52,19 @@ def build_msgs(self, *args, **kwargs):
                 # <discovery_prefix>/<component>/[<node_id>/]<object_id>/config
                 # topic "homeassistant/binary_sensor/garden/config"
                 # msg '{"name": "garden", "device_class": "motion", "state_topic": "homeassistant/binary_sensor/garden/state", "unit_of_measurement": "°C"}'
-                if unit == "bool":
+                if unit == "bool" or value == "enabled" or value == "disabled":
                     topic = f"homeassistant/binary_sensor/mpp_{tag}_{key}/config"
                     topic = topic.replace(" ", "_")
                     name = f"{tag} {_key}"
                     payload = f'{{"name": "{name}", "state_topic": "homeassistant/binary_sensor/mpp_{tag}_{key}/state", "unique_id": "mpp_{tag}_{key}", "force_update": "true" }}'
                     msg = {"topic": topic, "payload": payload}
                     msgs.append(msg)
                     topic = f"homeassistant/binary_sensor/mpp_{tag}_{key}/state"
+                    if value == 0 or value == "0" or value == "disabled":
+                        # for QPIWS one can add [or tag == "myQPIWStag"], if there's a QPIWS section in mpp-solar.conf
+                        value = "OFF"
+                    elif value == 1 or value == "1" or value == "enabled":
+                        value = "ON"
                     msg = {"topic": topic, "payload": value}
                     msgs.append(msg)
                 else: