Added support for DS18B20 temperature sensor. Thanks to Francesco Boscarino

code/html/index.html

@@ -112,6 +112,11 @@
                                     <input class="pure-u-1 pure-u-sm-3-4" type="text" name="mqttStatus" readonly />
                                 </div>
 
+                                <div class="pure-g module module-ds">
+                                    <label class="pure-u-1 pure-u-sm-1-4" for="dsTmp">Temperature (ºC)</label>
+                                    <input class="pure-u-1 pure-u-sm-3-4" type="text" name="dsTmp" readonly />
+                                </div>
+
                                 <div class="pure-g module module-dht">
                                     <label class="pure-u-1 pure-u-sm-1-4" for="dhtTmp">Temperature (ºC)</label>
                                     <input class="pure-u-1 pure-u-sm-3-4" type="text" name="dhtTmp" readonly />

code/platformio.ini

@@ -13,6 +13,8 @@ lib_deps =
     ESPAsyncUDP
     Embedis
     NtpClientLib
+    OneWire
+    DallasTemperature
     https://bitbucket.org/xoseperez/justwifi.git
     https://bitbucket.org/xoseperez/nofuss.git
     https://bitbucket.org/xoseperez/hlw8012.git

code/src/config/sensors.h

@@ -20,6 +20,15 @@
 #define DHT_TEMPERATURE_TOPIC   "/temperature"
 #define DHT_HUMIDITY_TOPIC      "/humidity"
 
+//--------------------------------------------------------------------------------
+// DS18B20 temperature sensor
+// Enable support by passing ENABLE_DS18B20=1 build flag
+//--------------------------------------------------------------------------------
+
+#define DS_PIN                  14
+#define DS_UPDATE_INTERVAL      60000
+#define DS_TEMPERATURE_TOPIC    "/temperature"
+
 //--------------------------------------------------------------------------------
 // Custom current sensor
 // Check http://tinkerman.cat/your-laundry-is-done/

code/src/dht.ino

@@ -14,19 +14,19 @@ Copyright (C) 2016 by Xose Pérez <xose dot perez at gmail dot com>
 
 DHT dht(DHT_PIN, DHT_TYPE, DHT_TIMING);
 
-char temperature[6];
-char humidity[6];
+char dhtTemperature[6];
+char dhtHumidity[6];
 
 // -----------------------------------------------------------------------------
 // DHT
 // -----------------------------------------------------------------------------
 
-char * getTemperature() {
-    return temperature;
+char * getDHTTemperature() {
+    return dhtTemperature;
 }
 
-char * getHumidity() {
-    return humidity;
+char * getDHTHumidity() {
+    return dhtHumidity;
 }
 
 void dhtSetup() {
@@ -53,19 +53,19 @@ void dhtLoop() {
 
         } else {
 
-            dtostrf(t, 4, 1, temperature);
-            itoa((int) h, humidity, 10);
+            dtostrf(t, 4, 1, dhtTemperature);
+            itoa((int) h, dhtHumidity, 10);
 
-            DEBUG_MSG("[DHT] Temperature: %s\n", temperature);
-            DEBUG_MSG("[DHT] Humidity: %s\n", humidity);
+            DEBUG_MSG("[DHT] Temperature: %s\n", dhtTemperature);
+            DEBUG_MSG("[DHT] Humidity: %s\n", dhtHumidity);
 
             // Send MQTT messages
-            mqttSend((char *) getSetting("dhtTmpTopic", DHT_TEMPERATURE_TOPIC).c_str(), temperature);
-            mqttSend((char *) getSetting("dhtHumTopic", DHT_HUMIDITY_TOPIC).c_str(), humidity);
+            mqttSend((char *) getSetting("dhtTmpTopic", DHT_TEMPERATURE_TOPIC).c_str(), dhtTemperature);
+            mqttSend((char *) getSetting("dhtHumTopic", DHT_HUMIDITY_TOPIC).c_str(), dhtHumidity);
 
             // Update websocket clients
             char buffer[100];
-            sprintf_P(buffer, PSTR("{\"dhtVisible\": 1, \"dhtTmp\": %s, \"dhtHum\": %s}"), temperature, humidity);
+            sprintf_P(buffer, PSTR("{\"dhtVisible\": 1, \"dhtTmp\": %s, \"dhtHum\": %s}"), dhtTemperature, dhtHumidity);
             wsSend(buffer);
 
         }

code/src/ds18b20.ino

@@ -0,0 +1,70 @@
+/*
+
+ESPurna
+SD18B20 MODULE
+
+Copyright (C) 2016 by Xose Pérez <xose dot perez at gmail dot com>
+
+*/
+
+#if ENABLE_DS18B20
+
+#include <OneWire.h>
+#include <DallasTemperature.h>
+
+OneWire oneWire(DS_PIN);
+DallasTemperature ds18b20(&oneWire);
+
+char dsTemperature[6];
+
+// -----------------------------------------------------------------------------
+// DS18B20
+// -----------------------------------------------------------------------------
+
+char * getDSTemperature() {
+    return dsTemperature;
+}
+
+void dsSetup() {
+    ds18b20.begin();
+}
+
+void dsLoop() {
+
+    if (!mqttConnected()) return;
+
+    // Check if we should read new data
+    static unsigned long last_update = 0;
+    if ((millis() - last_update > DS_UPDATE_INTERVAL) || (last_update == 0)) {
+        last_update = millis();
+
+        // Read sensor data
+        ds18b20.requestTemperatures();
+        double t = ds18b20.getTempCByIndex(0);
+
+        // Check if readings are valid
+        if (isnan(t)) {
+
+            DEBUG_MSG("[DS18B20] Error reading sensor\n");
+
+        } else {
+
+            dtostrf(t, 4, 1, dsTemperature);
+
+            DEBUG_MSG("[DS18B20] Temperature: %s\n", dsTemperature);
+
+            // Send MQTT messages
+            mqttSend((char *) getSetting("dsTmpTopic", DS_TEMPERATURE_TOPIC).c_str(), dsTemperature);
+
+            // Update websocket clients
+            char buffer[100];
+            sprintf_P(buffer, PSTR("{\"dsVisible\": 1, \"dsTmp\": %s}"), dsTemperature);
+            wsSend(buffer);
+
+        }
+
+    }
+
+}
+
+#endif

code/src/main.ino

@@ -155,6 +155,9 @@ void setup() {
     #if ENABLE_POW
         powSetup();
     #endif
+    #if ENABLE_DS18B20
+        dsSetup();
+    #endif
     #if ENABLE_DHT
         dhtSetup();
     #endif
@@ -183,6 +186,9 @@ void loop() {
     #if ENABLE_POW
         powLoop();
     #endif
+    #if ENABLE_DS18B20
+        dsLoop();
+    #endif
     #if ENABLE_DHT
         dhtLoop();
     #endif

code/src/web.ino

@@ -207,10 +207,15 @@ void _wsStart(uint32_t client_id) {
         root["fauxmoEnabled"] = getSetting("fauxmoEnabled", String(FAUXMO_ENABLED)).toInt() == 1;
     #endif
 
+    #if ENABLE_DS18B20
+        root["dsVisible"] = 1;
+        root["dsTmp"] = getDSTemperature();
+    #endif
+
     #if ENABLE_DHT
         root["dhtVisible"] = 1;
-        root["dhtTmp"] = getTemperature();
-        root["dhtHum"] = getHumidity();
+        root["dhtTmp"] = getDHTTemperature();
+        root["dhtHum"] = getDHTHumidity();
     #endif
 
     #if ENABLE_RF