Standardize MQTTDiscovery Temp Keys [deprecate tem key] (#703)

* Detect when sensor isn't available or read fails

* Add temperature conversion macros

* Add 'tempc' & 'tempf' keys to published values

* Unique Values for HA Discovery

* Remove degree symbol from temp sensors

Co-authored-by: Jonathan Michael Wells <jonathan-wells@oist.jp>

docs/use/sensors.md

@@ -5,11 +5,14 @@ Subscribe to all the messages with mosquitto or open your MQTT client software:
 
 ### ADC
 The value is between 0 and 1024 and is tranmitted via Mqtt when it changes.
-`home/OpenMQTTGateway/DHTtoMQTT {"value":543}`
+`home/OpenMQTTGateway/ADCtoMQTT {"value":543}`
 
 ### DHT
 You will receive every TimeBetweenReadingDHT (set into config_DHT.h) the DHT measurement (30s per default).
 
+`home/OpenMQTTGateway/DHTtoMQTT {"tempc":21,"tempf":69.8,"hum":51}`
+
+Legacy (removed after release 0.9.5)
 `home/OpenMQTTGateway/DHTtoMQTT {"temp":21,"hum":51}`
 
 If you want to don't resend value when it is the same you can set dht_always = false in config_DHT.h
@@ -32,6 +35,9 @@ If you don't want to resend values that haven't changed you can set AHTx0_always
 You will receive the DS18x20 sensor readings every DS1820_INTERVAL_SEC (set into config_DS1820.h) (60s by default).
 Each sensor will be published under the following topic using each sensors' address.
 
+`home/OpenMQTTGateway/CLIMAtoMQTT/ds1820/0x0000000000000000 {"tempc":27.8, "tempf":82.04, "type":"DS18B20","res":"12bit\n","addr":"0x28616411907650bc"}`
+
+Legacy (removed after release 0.9.5)
 `home/OpenMQTTGateway/CLIMAtoMQTT/ds1820/0x0000000000000000 {"temp":27.8,"unit":"C","type":"DS18B20","res":"12bit\n","addr":"0x28616411907650bc"}`
 
 The units for temperature readings are sent in Celcius by default can be changed to ferenheight by setting DS1820_FAHRENHEIT = true in in config_DS1820.h

main/ZgatewayBT.ino

@@ -135,11 +135,13 @@ void strupp(char* beg) {
 
 #  ifdef ZmqttDiscovery
 void MiFloraDiscovery(char* mac) {
-#    define MiFloraparametersCount 4
+#    define MiFloraparametersCount 6
   Log.trace(F("MiFloraDiscovery" CR));
   char* MiFlorasensor[MiFloraparametersCount][8] = {
       {"sensor", "MiFlora-lux", mac, "illuminance", jsonLux, "", "", "lx"},
-      {"sensor", "MiFlora-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "MiFlora-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "MiFlora-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "MiFlora-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "MiFlora-fer", mac, "", jsonFer, "", "", "µS/cm"},
       {"sensor", "MiFlora-moi", mac, "", jsonMoi, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
@@ -150,11 +152,13 @@ void MiFloraDiscovery(char* mac) {
 }
 
 void VegTrugDiscovery(char* mac) {
-#    define VegTrugparametersCount 4
+#    define VegTrugparametersCount 6
   Log.trace(F("VegTrugDiscovery" CR));
   char* VegTrugsensor[VegTrugparametersCount][8] = {
       {"sensor", "VegTrug-lux", mac, "illuminance", jsonLux, "", "", "lx"},
-      {"sensor", "VegTrug-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "VegTrug-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "VegTrug-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "VegTrug-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "VegTrug-fer", mac, "", jsonFer, "", "", "µS/cm"},
       {"sensor", "VegTrug-moi", mac, "", jsonMoi, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
@@ -165,11 +169,13 @@ void VegTrugDiscovery(char* mac) {
 }
 
 void MiJiaDiscovery(char* mac) {
-#    define MiJiaparametersCount 3
+#    define MiJiaparametersCount 5
   Log.trace(F("MiJiaDiscovery" CR));
   char* MiJiasensor[MiJiaparametersCount][8] = {
       {"sensor", "MiJia-batt", mac, "battery", jsonBatt, "", "", "%"},
-      {"sensor", "MiJia-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "MiJia-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "MiJia-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "MiJia-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "MiJia-hum", mac, "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -179,11 +185,13 @@ void MiJiaDiscovery(char* mac) {
 }
 
 void LYWSD02Discovery(char* mac) {
-#    define LYWSD02parametersCount 3
+#    define LYWSD02parametersCount 5
   Log.trace(F("LYWSD02Discovery" CR));
   char* LYWSD02sensor[LYWSD02parametersCount][8] = {
       {"sensor", "LYWSD02-batt", mac, "battery", jsonBatt, "", "", "V"},
-      {"sensor", "LYWSD02-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "LYWSD02-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "LYWSD02-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "LYWSD02-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "LYWSD02-hum", mac, "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -193,11 +201,13 @@ void LYWSD02Discovery(char* mac) {
 }
 
 void CLEARGRASSTRHDiscovery(char* mac) {
-#    define CLEARGRASSTRHparametersCount 3
+#    define CLEARGRASSTRHparametersCount 5
   Log.trace(F("CLEARGRASSTRHDiscovery" CR));
   char* CLEARGRASSTRHsensor[CLEARGRASSTRHparametersCount][8] = {
       {"sensor", "CLEARGRASSTRH-batt", mac, "battery", jsonBatt, "", "", "V"},
-      {"sensor", "CLEARGRASSTRH-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "CLEARGRASSTRH-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "CLEARGRASSTRH-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "CLEARGRASSTRH-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "CLEARGRASSTRH-hum", mac, "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -207,11 +217,13 @@ void CLEARGRASSTRHDiscovery(char* mac) {
 }
 
 void CLEARGRASSCGD1Discovery(char* mac) {
-#    define CLEARGRASSCGD1parametersCount 3
+#    define CLEARGRASSCGD1parametersCount 5
   Log.trace(F("CLEARGRASSCGD1Discovery" CR));
   char* CLEARGRASSCGD1sensor[CLEARGRASSCGD1parametersCount][8] = {
       {"sensor", "CLEARGRASSCGD1-batt", mac, "battery", jsonBatt, "", "", "V"},
-      {"sensor", "CLEARGRASSCGD1-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "CLEARGRASSCGD1-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "CLEARGRASSCGD1-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "CLEARGRASSCGD1-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "CLEARGRASSCGD1-hum", mac, "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -221,11 +233,13 @@ void CLEARGRASSCGD1Discovery(char* mac) {
 }
 
 void CLEARGRASSTRHKPADiscovery(char* mac) {
-#    define CLEARGRASSTRHKPAparametersCount 3
+#    define CLEARGRASSTRHKPAparametersCount 5
   Log.trace(F("CLEARGRASSTRHKPADiscovery" CR));
   char* CLEARGRASSTRHKPAsensor[CLEARGRASSTRHKPAparametersCount][8] = {
       {"sensor", "CLEARGRASSTRHKPA-pres", mac, "pressure", jsonPres, "", "", "kPa"},
-      {"sensor", "CLEARGRASSTRHKPA-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "CLEARGRASSTRHKPA-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "CLEARGRASSTRHKPA-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "CLEARGRASSTRHKPA-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "CLEARGRASSTRHKPA-hum", mac, "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -271,11 +285,13 @@ void MiBandDiscovery(char* mac) {
 }
 
 void InkBirdDiscovery(char* mac) {
-#    define InkBirdparametersCount 3
+#    define InkBirdparametersCount 5
   Log.trace(F("InkBirdDiscovery" CR));
   char* InkBirdsensor[InkBirdparametersCount][8] = {
       {"sensor", "InkBird-batt", mac, "battery", jsonBatt, "", "", "%"},
-      {"sensor", "InkBird-tem", mac, "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "InkBird-tem", mac, "temperature", jsonTempc, "", "", "C"}, // remove for 0.9.6 release
+      {"sensor", "InkBird-tempc", mac, "temperature", jsonTempc, "", "", "C"},
+      {"sensor", "InkBird-tempf", mac, "temperature", jsonTempf, "", "", "F"},
       {"sensor", "InkBird-hum", mac, "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -845,7 +861,9 @@ JsonObject& process_sensors(int offset, JsonObject& BLEdata) {
       BLEdata.set("fer", (double)value);
       break;
     case '4':
-      BLEdata.set("tem", (double)value / 10);
+      BLEdata.set("tem", (double)value / 10); // remove for 0.9.6 release
+      BLEdata.set("tempc", (double)value / 10);
+      BLEdata.set("tempf", (double)convertTemp_CtoF(value) / 10);
       break;
     case '6':
       BLEdata.set("hum", (double)value / 10);
@@ -860,10 +878,12 @@ JsonObject& process_sensors(int offset, JsonObject& BLEdata) {
       BLEdata.set("batt", (double)value);
       break;
     case 'd':
-      // humidity
-      value = value_from_service_data(servicedata, 28 + offset, 4);
-      BLEdata.set("tem", (double)value / 10);
       // temperature
+      value = value_from_service_data(servicedata, 28 + offset, 4);
+      BLEdata.set("tem", (double)value / 10); // remove for 0.9.6 release
+      BLEdata.set("tempc", (double)value / 10);
+      BLEdata.set("tempf", (double)convertTemp_CtoF(value) / 10);
+      // humidity
       value = value_from_service_data(servicedata, 32 + offset, 4);
       BLEdata.set("hum", (double)value / 10);
       break;
@@ -906,7 +926,9 @@ JsonObject& process_inkbird(JsonObject& BLEdata) {
   double battery = value_from_service_data(manufacturerdata, 14, 2);
 
   //Set Json values
-  BLEdata.set("tem", (double)temperature);
+  BLEdata.set("tem", (double)temperature); // remove for 0.9.6 release
+  BLEdata.set("tempc", (double)temperature);
+  BLEdata.set("tempf", (double)convertTemp_CtoF(temperature));
   BLEdata.set("hum", (double)humidity);
   BLEdata.set("batt", (double)battery);
 
@@ -940,10 +962,12 @@ JsonObject& process_cleargrass(JsonObject& BLEdata, boolean air) {
   const char* servicedata = BLEdata["servicedata"].as<const char*>();
 
   double value = 9999;
-  // humidity
-  value = value_from_service_data(servicedata, 20, 4);
-  BLEdata.set("tem", (double)value / 10);
   // temperature
+  value = value_from_service_data(servicedata, 20, 4);
+  BLEdata.set("tem", (double)value / 10); // remove for 0.9.6 release
+  BLEdata.set("tempc", (double)value / 10);
+  BLEdata.set("tempf", (double)convertTemp_CtoF(value) / 10);
+  // humidity
   value = value_from_service_data(servicedata, 24, 4);
   BLEdata.set("hum", (double)value / 10);
   if (air) {

main/ZgatewayWeatherStation.ino

@@ -105,7 +105,9 @@ void sendTemperatureData(byte id, float temperature, int humidity, byte battery_
     StaticJsonBuffer<JSON_MSG_CALC_BUFFER> jsonBuffer;
     JsonObject& RFdata = jsonBuffer.createObject();
     RFdata.set("sensor", id);
-    RFdata.set("temperature", temperature);
+    RFdata.set("temperature", temperature); // remove for 0.9.6 release
+    RFdata.set("tempc", temperature);
+    RFdata.set("tempf", wsdr.convertCtoF(temperature));
     RFdata.set("humidity", humidity);
     RFdata.set("battery", bitRead(battery_status, 0) == 0 ? "OK" : "Low");
     pub(subjectRFtoMQTT, RFdata);

main/ZmqttDiscovery.ino

@@ -145,8 +145,8 @@ void pubMqttDiscovery() {
 #    define BMEparametersCount 6
   Log.trace(F("bme280Discovery" CR));
   char* BMEsensor[BMEparametersCount][8] = {
-      {"sensor", "tempc", "bme", "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "tempc", "bme", "temperature", jsonTempc, "", "", "C"},
-      {"sensor", "tempf", "bme", "temperature", jsonTempf, "", "", "°F"},
+      {"sensor", "tempf", "bme", "temperature", jsonTempf, "", "", "F"},
       {"sensor", "pa", "bme", "", jsonPa, "", "", "hPa"},
       {"sensor", "hum", "bme", "humidity", jsonHum, "", "", "%"},
       {"sensor", "altim", "bme", "", jsonAltim, "", "", "m"},
@@ -169,8 +169,8 @@ void pubMqttDiscovery() {
 #    define HTUparametersCount 3
   Log.trace(F("htu21Discovery" CR));
   char* HTUsensor[HTUparametersCount][8] = {
-      {"sensor", "tempc", "htu", "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "tempc", "htu", "temperature", jsonTempc, "", "", "C"},
-      {"sensor", "tempf", "htu", "temperature", jsonTempf, "", "", "°F"},
+      {"sensor", "tempf", "htu", "temperature", jsonTempf, "", "", "F"},
       {"sensor", "hum", "htu", "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -190,8 +190,8 @@ void pubMqttDiscovery() {
 #    define AHTparametersCount 3
   Log.trace(F("AHTx0Discovery" CR));
   char* AHTsensor[AHTparametersCount][8] = {
-      {"sensor", "tempc", "aht", "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "tempc", "aht", "temperature", jsonTempc, "", "", "C"},
-      {"sensor", "tempf", "aht", "temperature", jsonTempf, "", "", "°F"},
+      {"sensor", "tempf", "aht", "temperature", jsonTempf, "", "", "F"},
       {"sensor", "hum", "aht", "humidity", jsonHum, "", "", "%"}
       //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
   };
@@ -207,11 +207,14 @@ void pubMqttDiscovery() {
 #  endif
 
 #  ifdef ZsensorDHT
-#    define DHTparametersCount 2
+#    define DHTparametersCount 3
   Log.trace(F("DHTDiscovery" CR));
   char* DHTsensor[DHTparametersCount][8] = {
-      {"sensor", "tempc", "dht", "temperature", jsonTemp, "", "", "°C"},
+      {"sensor", "tempc", "dht", "temperature", jsonTempc, "", "", "C"},
-      {"sensor", "hum", "dht", "humidity", jsonHum, "", "", "%"}};
+      {"sensor", "tempf", "dht", "temperature", jsonTempf, "", "", "F"},
+      {"sensor", "hum", "dht", "humidity", jsonHum, "", "", "%"}
+      //component type,name,availability topic,device class,value template,payload on, payload off, unit of measurement
+  };
 
   for (int i = 0; i < DHTparametersCount; i++) {
     Log.trace(F("CreateDiscoverySensor" CR));

main/ZsensorAHTx0.ino

@@ -90,7 +90,7 @@ void MeasureAHTTempHum() {
       JsonObject& AHTx0data = jsonBuffer.createObject();
       // Generate Temperature in degrees C
       if (ahtTempC.temperature != persisted_aht_tempc || AHTx0_always) {
-        float ahtTempF = (ahtTempC.temperature * 1.8) + 32;
+        float ahtTempF = convertTemp_CtoF(ahtTempC.temperature);
         AHTx0data.set("tempc", (float)ahtTempC.temperature);
         AHTx0data.set("tempf", (float)ahtTempF);
       } else {

main/ZsensorDHT.ino

@@ -63,7 +63,9 @@ void MeasureTempAndHum() {
         Log.trace(F("Same hum don't send it" CR));
       }
       if (t != persistedt || dht_always) {
-        DHTdata.set("temp", (float)t);
+        DHTdata.set("temp", (float)t); // remove for 0.9.6 release
+        DHTdata.set("tempc", (float)t);
+        DHTdata.set("tempf", dht.convertCtoF(t));
       } else {
         Log.trace(F("Same temp don't send it" CR));
       }

main/ZsensorDS1820.ino

@@ -102,27 +102,24 @@ void pubOneWire_HADiscovery() {
 #  ifdef ZmqttDiscovery
   Log.notice(F("CreateDiscoverySensor - Found %d" CR), ds1820_count);
   for (int index = 0; index < ds1820_count; index++) {
-#    if DS1820_FAHRENHEIT
     createDiscovery("sensor",
                     (char*)(String(OW_TOPIC) + "/" + ds1820_addr[index]).c_str(),
-                    (char*)String("DS12B20_" + String(index + 1)).c_str(),
+                    (char*)("DS12B20_" + String(index + 1) + "_f").c_str(),
-                    (char*)ds1820_addr[index].c_str(),
+                    (char*)(ds1820_addr[index] + "_f").c_str(),
                     will_Topic,
                     "temperature",
                     jsonTempf,
-                    "", "", "°F",
+                    "", "", "F",
                     0, "", "", true, "");
-#    else
     createDiscovery("sensor",
                     (char*)(String(OW_TOPIC) + "/" + ds1820_addr[index]).c_str(),
-                    (char*)String("DS12B20_" + String(index + 1)).c_str(),
+                    (char*)("DS12B20_" + String(index + 1) + "_c").c_str(),
-                    (char*)ds1820_addr[index].c_str(),
+                    (char*)(ds1820_addr[index] + "_c").c_str(),
                     will_Topic,
                     "temperature",
-                    jsonTemp,
+                    jsonTempc,
-                    "", "", "°C",
+                    "", "", "C",
                     0, "", "", true, "");
-#    endif
   }
 #  endif
 }
@@ -155,6 +152,7 @@ void MeasureDS1820Temp() {
         if (current_temp[i] == -127) {
           Log.error(F("DS1820: Device %s currently disconnected!" CR), (char*)ds1820_addr[i].c_str());
         } else if (DS1820_ALWAYS || current_temp[i] != persisted_temp[i]) {
+          // remove for 0.9.6 release -- BEGIN (Additional BREAKING CHANGE - Unit will be removed)
           if (DS1820_FAHRENHEIT) {
             Log.notice(F("DS1820: Temperature %s %d F" CR),
                        (char*)ds1820_addr[i].c_str(),
@@ -170,6 +168,11 @@ void MeasureDS1820Temp() {
             DS1820data.set("temp", (float)current_temp[i]);
             DS1820data.set("unit", "C");
           }
+          // remove for 0.9.6 release -- END
+
+          DS1820data.set("tempc", (float)DallasTemperature::toFahrenheit(current_temp[i]));
+          DS1820data.set("tempf", (float)current_temp[i]);
+
           if (DS1820_DETAILS) {
             DS1820data.set("type", ds1820_type[i]);
             DS1820data.set("res", ds1820_resolution[i] + String("bit" CR));

main/config_DS1820.h

@@ -36,9 +36,9 @@ extern void pubOneWire_HADiscovery();
 #define DS1820_ALWAYS       true // if false only published current temperature if has changed from previous reading
 #define DS1820_INTERVAL_SEC 60 // time between DS1820 readings (seconds)
 #define DS1820_RESOLUTION   10 // conversion times: 9 bit (93.75 ms), 10 bit (187.5 ms), 11 bit (375 ms), 12 bit (750 ms)
-#ifndef DS1820_FAHRENHEIT
+#ifndef DS1820_FAHRENHEIT // remove for 0.9.6 release
-#  define DS1820_FAHRENHEIT false // defaults to Celcius
+#  define DS1820_FAHRENHEIT false // defaults to Celcius // remove for 0.9.6 release
-#endif
+#endif // remove for 0.9.6 release
 #define DS1820_DETAILS   true // publish extented info for each sensor (resolution, address, type)
 #define DS1820_CONV_TIME 2000 // trigger conversion before requesting temperature readings (ms)
 /*-------------------PIN DEFINITIONS----------------------*/

main/config_mqttDiscovery.h

@@ -52,12 +52,13 @@ extern void createDiscovery(char* sensor_type,
 #  define jsonFer      "{{ value_json.fer }}"
 #  define jsonMoi      "{{ value_json.moi }}"
 #  define jsonHum      "{{ value_json.hum }}"
-#  define jsonTemp     "{{ value_json.tem }}"
+#  define jsonTemp     "{{ value_json.tem }}" // remove for 0.9.6 release
 #  define jsonStep     "{{ value_json.steps }}"
 #  define jsonWeight   "{{ value_json.weight }}"
 #  define jsonPresence "{{ value_json.presence }}"
 #  define jsonAltim    "{{ value_json.altim }}"
 #  define jsonAltif    "{{ value_json.altift }}"
+#  define jsonTempc    "{{ value_json.tempc }}"
 #  define jsonTempf    "{{ value_json.tempf }}"
 #  define jsonMsg      "{{ value_json.message }}"
 #  define jsonVal      "{{ value_json.value }}"
@@ -77,12 +78,13 @@ extern void createDiscovery(char* sensor_type,
 #  define jsonFer      "{{ value_json.fer | is_defined }}"
 #  define jsonMoi      "{{ value_json.moi | is_defined }}"
 #  define jsonHum      "{{ value_json.hum | is_defined }}"
-#  define jsonTemp     "{{ value_json.tem | is_defined }}"
+#  define jsonTemp     "{{ value_json.tem | is_defined }}" // remove for 0.9.6 release
 #  define jsonStep     "{{ value_json.steps | is_defined }}"
 #  define jsonWeight   "{{ value_json.weight | is_defined }}"
 #  define jsonPresence "{{ value_json.presence | is_defined }}"
 #  define jsonAltim    "{{ value_json.altim | is_defined }}"
 #  define jsonAltif    "{{ value_json.altift | is_defined }}"
+#  define jsonTempc    "{{ value_json.tempc | is_defined }}"
 #  define jsonTempf    "{{ value_json.tempf | is_defined }}"
 #  define jsonMsg      "{{ value_json.message | is_defined }}"
 #  define jsonVal      "{{ value_json.value | is_defined }}"

main/main.ino

@@ -168,6 +168,9 @@ WiFiClient eClient;
 EthernetClient eClient;
 #endif
 
+#define convertTemp_CtoF(c) ((c * 1.8) + 32)
+#define convertTemp_FtoC(f) ((f - 32) * 5 / 9)
+
 // client link to pubsub mqtt
 PubSubClient client(eClient);