Support for TMP35 & TMP37 temperature sensors

code/espurna/config/sensors.h

@@ -109,7 +109,7 @@
 #define SENSOR_AM2320_ID                    0x19
 #define SENSOR_GUVAS12SD_ID                 0x20
 #define SENSOR_CSE7766_ID                   0x21
-#define SENSOR_TMP36_ID                     0x22
+#define SENSOR_TMP3X_ID                     0x22
 
 //--------------------------------------------------------------------------------
 // Magnitudes
@@ -516,15 +516,19 @@
 #endif
 
 //------------------------------------------------------------------------------
-// TMP36 analog temperature sensor
-// Enable support by passing TMP36_SUPPORT=1 build flag
+// TMP3X analog temperature sensor
+// Enable support by passing TMP3X_SUPPORT=1 build flag
 //------------------------------------------------------------------------------
 
-#ifndef TMP36_SUPPORT
-#define TMP36_SUPPORT                   1
+#ifndef TMP3X_SUPPORT
+#define TMP3X_SUPPORT                   1
 #endif
 
-#if TMP36_SUPPORT
+#ifndef TMP3X_TYPE
+#define TMP3X_TYPE                      TMP3X_TMP35
+#endif
+
+#if TMP3X_SUPPORT
 #undef ADC_VCC_ENABLED
 #define ADC_VCC_ENABLED                 0
 #endif
@@ -597,7 +601,7 @@
     || EMON_ANALOG_SUPPORT || EVENTS_SUPPORT || HLW8012_SUPPORT \
     || MHZ19_SUPPORT || PMSX003_SUPPORT || SHT3X_I2C_SUPPORT \
     || SI7021_SUPPORT || V9261F_SUPPORT || AM2320_SUPPORT \
-    || GUVAS12SD_SUPPORT || CSE7766_SUPPORT || TMP36_SUPPORT
+    || GUVAS12SD_SUPPORT || CSE7766_SUPPORT || TMP3X_SUPPORT
 #define SENSOR_SUPPORT                      1
 #else
 #define SENSOR_SUPPORT                      0
@@ -803,8 +807,8 @@ PROGMEM const char* const magnitude_units[] = {
     #include "../sensors/SHT3XI2CSensor.h"
 #endif
 
-#if TMP36_SUPPORT
-    #include "../sensors/TMP36Sensor.h"
+#if TMP3X_SUPPORT
+    #include "../sensors/TMP3XSensor.h"
 #endif
 
 #if V9261F_SUPPORT

code/espurna/sensor.ino

@@ -484,9 +484,10 @@ void _sensorLoad() {
     }
     #endif
 
-    #if TMP36_SUPPORT
+    #if TMP3X_SUPPORT
     {
-        TMP36Sensor * sensor = new TMP36Sensor();
+        TMP3XSensor * sensor = new TMP3XSensor();
+        sensor->setType(TMP3X_TYPE);
         _sensors.push_back(sensor);
     }
     #endif

code/espurna/sensors/TMP36Sensor.h → code/espurna/sensors/TMP3XSensor.h

@@ -1,16 +1,20 @@
 // -----------------------------------------------------------------------------
-// Analog Sensor (maps to an analogRead)
-// Copyright (C) 2017-2018 by Xose Pérez <xose dot perez at gmail dot com>
+// TMP3X Temperature Analog Sensor
+// Copyright (C) 2018 by Xose Pérez <xose dot perez at gmail dot com>
 // -----------------------------------------------------------------------------
 
-#if SENSOR_SUPPORT && TMP36_SUPPORT
+#if SENSOR_SUPPORT && TMP3X_SUPPORT
 
 #pragma once
 
 #include "Arduino.h"
 #include "BaseSensor.h"
 
-class TMP36Sensor : public BaseSensor {
+#define TMP3X_TMP35                 35
+#define TMP3X_TMP36                 36
+#define TMP3X_TMP37                 37
+
+class TMP3XSensor : public BaseSensor {
 
     public:
 
@@ -18,9 +22,21 @@ class TMP36Sensor : public BaseSensor {
         // Public
         // ---------------------------------------------------------------------
 
-        TMP36Sensor(): BaseSensor() {
+        TMP3XSensor(): BaseSensor() {
             _count = 1;
-            _sensor_id = SENSOR_TMP36_ID;
+            _sensor_id = SENSOR_TMP3X_ID;
+        }
+
+        void setType(unsigned char type) {
+            if (type == _type) return;
+            if (35 <= type && type <= 37) {
+              _type = type;
+              _dirty = true;
+            }
+        }
+
+        unsigned char getType() {
+            return _type;
         }
 
         // ---------------------------------------------------------------------
@@ -35,7 +51,9 @@ class TMP36Sensor : public BaseSensor {
 
         // Descriptive name of the sensor
         String description() {
-            return String("TMP36 @ TOUT");
+            char buffer[14];
+            snprintf(buffer, sizeof(buffer), "TMP%d @ TOUT", _type);
+            return String(buffer);
         }
 
         // Descriptive name of the slot # index
@@ -56,11 +74,19 @@ class TMP36Sensor : public BaseSensor {
 
         // Current value for slot # index
         double value(unsigned char index) {
-            if (index == 0) return (double) analogRead(0) * 100 * (3.3 / 1024) - 50;
+            if (index == 0) {
+                double mV = 3300.0 * analogRead(0) / 1024.0;
+                if (_type == TMP3X_TMP35) return mV / 10.0;
+                if (_type == TMP3X_TMP36) return mV / 10.0 - 50.0;
+                if (_type == TMP3X_TMP37) return mV / 20.0;
+            }
             return 0;
         }
 
+    private:
+
+        unsigned char _type = TMP3X_TMP35;
 
 };
 
-#endif // SENSOR_SUPPORT && TMP36_SUPPORT
+#endif // SENSOR_SUPPORT && TMP3X_SUPPORT