TMP36 temperature analog sensor support

README.md

@@ -4,9 +4,9 @@ ESPurna ("spark" in Catalan) is a custom firmware for ESP8285/ESP8266 based smar
 It uses the Arduino Core for ESP8266 framework and a number of 3rd party libraries.
 
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code/espurna/config/sensors.h

@@ -109,6 +109,7 @@
 #define SENSOR_AM2320_ID                    0x19
 #define SENSOR_GUVAS12SD_ID                 0x20
 #define SENSOR_CSE7766_ID                   0x21
+#define SENSOR_TMP36_ID                     0x22
 
 //--------------------------------------------------------------------------------
 // Magnitudes
@@ -514,6 +515,20 @@
 #define I2C_SUPPORT                     1
 #endif
 
+//------------------------------------------------------------------------------
+// TMP36 analog temperature sensor
+// Enable support by passing TMP36_SUPPORT=1 build flag
+//------------------------------------------------------------------------------
+
+#ifndef TMP36_SUPPORT
+#define TMP36_SUPPORT                   1
+#endif
+
+#if TMP36_SUPPORT
+#undef ADC_VCC_ENABLED
+#define ADC_VCC_ENABLED                 0
+#endif
+
 //------------------------------------------------------------------------------
 // V9261F based power sensor
 // Enable support by passing SI7021_SUPPORT=1 build flag
@@ -582,7 +597,7 @@
     || EMON_ANALOG_SUPPORT || EVENTS_SUPPORT || HLW8012_SUPPORT \
     || MHZ19_SUPPORT || PMSX003_SUPPORT || SHT3X_I2C_SUPPORT \
     || SI7021_SUPPORT || V9261F_SUPPORT || AM2320_SUPPORT \
-    || GUVAS12SD_SUPPORT || CSE7766_SUPPORT
+    || GUVAS12SD_SUPPORT || CSE7766_SUPPORT || TMP36_SUPPORT
 #define SENSOR_SUPPORT                      1
 #else
 #define SENSOR_SUPPORT                      0
@@ -701,6 +716,10 @@ PROGMEM const char* const magnitude_units[] = {
 
 #include "../sensors/BaseSensor.h"
 
+#if AM2320_SUPPORT
+    #include "../sensors/AM2320Sensor.h"
+#endif
+
 #if ANALOG_SUPPORT
     #include "../sensors/AnalogSensor.h"
 #endif
@@ -751,6 +770,10 @@ PROGMEM const char* const magnitude_units[] = {
     #include "../sensors/EventSensor.h"
 #endif
 
+#if GUVAS12SD_SUPPORT
+    #include "../sensors/GUVAS12SDSensor.h"
+#endif
+
 #if HLW8012_SUPPORT
     #include <HLW8012.h>
     #include "../sensors/HLW8012Sensor.h"
@@ -780,17 +803,13 @@ PROGMEM const char* const magnitude_units[] = {
     #include "../sensors/SHT3XI2CSensor.h"
 #endif
 
+#if TMP36_SUPPORT
+    #include "../sensors/TMP36Sensor.h"
+#endif
+
 #if V9261F_SUPPORT
     #include <SoftwareSerial.h>
     #include "../sensors/V9261FSensor.h"
 #endif
 
-#if AM2320_SUPPORT
-    #include "../sensors/AM2320Sensor.h"
-#endif
-
-#if GUVAS12SD_SUPPORT
-    #include "../sensors/GUVAS12SDSensor.h"
-#endif
-
 #endif // SENSOR_SUPPORT

code/espurna/sensor.ino

@@ -484,6 +484,13 @@ void _sensorLoad() {
     }
     #endif
 
+    #if TMP36_SUPPORT
+    {
+        TMP36Sensor * sensor = new TMP36Sensor();
+        _sensors.push_back(sensor);
+    }
+    #endif
+
     #if V9261F_SUPPORT
     {
         V9261FSensor * sensor = new V9261FSensor();

code/espurna/sensors/TMP36Sensor.h

@@ -0,0 +1,66 @@
+// -----------------------------------------------------------------------------
+// Analog Sensor (maps to an analogRead)
+// Copyright (C) 2017-2018 by Xose Pérez <xose dot perez at gmail dot com>
+// -----------------------------------------------------------------------------
+
+#if SENSOR_SUPPORT && TMP36_SUPPORT
+
+#pragma once
+
+#include "Arduino.h"
+#include "BaseSensor.h"
+
+class TMP36Sensor : public BaseSensor {
+
+    public:
+
+        // ---------------------------------------------------------------------
+        // Public
+        // ---------------------------------------------------------------------
+
+        TMP36Sensor(): BaseSensor() {
+            _count = 1;
+            _sensor_id = SENSOR_TMP36_ID;
+        }
+
+        // ---------------------------------------------------------------------
+        // Sensor API
+        // ---------------------------------------------------------------------
+
+        // Initialization method, must be idempotent
+        void begin() {
+            pinMode(0, INPUT);
+            _ready = true;
+        }
+
+        // Descriptive name of the sensor
+        String description() {
+            return String("TMP36 @ TOUT");
+        }
+
+        // Descriptive name of the slot # index
+        String slot(unsigned char index) {
+            return description();
+        };
+
+        // Address of the sensor (it could be the GPIO or I2C address)
+        String address(unsigned char index) {
+            return String("0");
+        }
+
+        // Type for slot # index
+        unsigned char type(unsigned char index) {
+            if (index == 0) return MAGNITUDE_TEMPERATURE;
+            return MAGNITUDE_NONE;
+        }
+
+        // Current value for slot # index
+        double value(unsigned char index) {
+            if (index == 0) return (double) analogRead(0) * 100 * (3.3 / 1024) - 50;
+            return 0;
+        }
+
+
+};
+
+#endif // SENSOR_SUPPORT && TMP36_SUPPORT