Option to take several samples with AnalogSensor

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

@@ -79,6 +79,14 @@
 #define ANALOG_SUPPORT                  0
 #endif
 
+#ifndef ANALOG_SAMPLES
+#define ANALOG_SAMPLES                  10      // Number of samples
+#endif
+
+#ifndef ANALOG_DELAY
+#define ANALOG_DELAY                    0       // Delay between samples in micros
+#endif
+
 //------------------------------------------------------------------------------
 // BH1750
 // Enable support by passing BH1750_SUPPORT=1 build flag

code/espurna/sensors/AnalogSensor.h

@@ -27,6 +27,24 @@ class AnalogSensor : public BaseSensor {
             _sensor_id = SENSOR_ANALOG_ID;
         }
 
+        void setSamples(unsigned int samples) {
+            if (_samples > 0) _samples = samples;
+        }
+
+        void setDelay(unsigned long micros) {
+            _micros = micros;
+        }
+
+        // ---------------------------------------------------------------------
+
+        unsigned int getSamples() {
+            return _samples;
+        }
+
+        unsigned long getDelay() {
+            return _micros;
+        }
+
         // ---------------------------------------------------------------------
         // Sensor API
         // ---------------------------------------------------------------------
@@ -60,10 +78,24 @@ class AnalogSensor : public BaseSensor {
 
         // Current value for slot # index
         double value(unsigned char index) {
-            if (index == 0) return analogRead(0);
+            if (index == 0) return _read();
             return 0;
         }
 
+    protected:
+
+        unsigned int _read() {
+            if (1 == _samples) return analogRead(0);
+            unsigned long sum = 0;
+            for (unsigned int i=0; i<_samples; i++) {
+                if (i>0) delayMicroseconds(_micros);
+                sum += analogRead(0);
+            }
+            return sum / _samples;
+        }
+
+        unsigned int _samples = 1;
+        unsigned long _micros = 0;
 
 };