update temperature unit to work in HA (#768)

* update temperature unit to work in HA
* use only one temperature sensor for HA

main/ZsensorDS1820.ino

@@ -102,15 +102,6 @@ void pubOneWire_HADiscovery() {
 #  ifdef ZmqttDiscovery
   Log.notice(F("CreateDiscoverySensor - Found %d" CR), ds1820_count);
   for (int index = 0; index < ds1820_count; index++) {
-    createDiscovery("sensor",
-                    (char*)(String(OW_TOPIC) + "/" + ds1820_addr[index]).c_str(),
-                    (char*)("DS12B20_" + String(index + 1) + "_f").c_str(),
-                    (char*)(ds1820_addr[index] + "_f").c_str(),
-                    will_Topic,
-                    "temperature",
-                    jsonTempf,
-                    "", "", "F",
-                    0, "", "", true, "");
     createDiscovery("sensor",
                     (char*)(String(OW_TOPIC) + "/" + ds1820_addr[index]).c_str(),
                     (char*)("DS12B20_" + String(index + 1) + "_c").c_str(),
@@ -118,7 +109,7 @@ void pubOneWire_HADiscovery() {
                     will_Topic,
                     "temperature",
                     jsonTempc,
-                    "", "", "C",
+                    "", "", "°C",
                     0, "", "", true, "");
   }
 #  endif