Use single state payload and HA value templates.

HADiscovery.py

@@ -12,13 +12,6 @@ def decamelcase(str):
 HA_DISCOVERY_PREFIX = "homeassistant"
 
 
-def publish_ha_states(state, client, mqtt_topic):
-    for key, value in state.items():
-        state_topic = f"{mqtt_topic}/{key}"
-        print(f"{now()} Publishing state for {key} at {state_topic}")
-        client.publish(state_topic, json.dumps(value))
-
-
 def publish_ha_discovery(device, client, mqtt_topic):
     print(f"{now()} Publishing HA discovery for {device}")
 
@@ -56,13 +49,14 @@ def publish_ha_discovery(device, client, mqtt_topic):
             component_type = "sensor" # TODO use appropriate types
 
             discovery_topic = f"{HA_DISCOVERY_PREFIX}/{component_type}/hcpy/{device_ident}_{name}/config"
-            state_topic = f"{mqtt_topic}/{name}"
             # print(discovery_topic, state_topic)
 
             discovery_payload = json.dumps({
                 "name": decamelcase(name),
                 "device": device_info,
-                "state_topic": state_topic,
+                "state_topic": f"{mqtt_topic}/state",
+                "availability_topic": f"{mqtt_topic}/LWT",
+                "value_template": "{{value_json." + name + "}}",
                 "object_id": f"{device_ident}_{name}",
                 "unique_id": f"{device_ident}_{name}",
             })

hc2mqtt.py

@@ -13,7 +13,7 @@ import paho.mqtt.client as mqtt
 
 from HCDevice import HCDevice
 from HCSocket import HCSocket, now
-from HADiscovery import publish_ha_states, publish_ha_discovery
+from HADiscovery import publish_ha_discovery
 
 
 @click.command()
@@ -153,7 +153,7 @@ def hc2mqtt(
     for device in devices:
         mqtt_topic = mqtt_prefix + device["host"]
         thread = Thread(
-            target=client_connect, args=(client, device, mqtt_topic, domain_suffix, debug, ha_discovery)
+            target=client_connect, args=(client, device, mqtt_topic, domain_suffix, debug)
         )
         thread.start()
 
@@ -164,7 +164,7 @@ global dev
 dev = {}
 
 
-def client_connect(client, device, mqtt_topic, domain_suffix, debug, ha_discovery):
+def client_connect(client, device, mqtt_topic, domain_suffix, debug):
     host = device["host"]
     name = device["name"]
 
@@ -198,8 +198,6 @@ def client_connect(client, device, mqtt_topic, domain_suffix, debug, ha_discover
                     msg = json.dumps(state)
                     print(now(), name, f"publish to {mqtt_topic} with {msg}")
                     client.publish(f"{mqtt_topic}/state", msg, retain=True)
-                    if ha_discovery:
-                        publish_ha_states(state, client, mqtt_topic)
                 else:
                     print(
                         now(),