filter nosiy measurement from dht22 with diffrence > 10 from average

[Arduino] / rpi_promini / rpi_promini.ino

diff --git a/rpi_promini/rpi_promini.ino b/rpi_promini/rpi_promini.ino
index ea9eb67..d767dd0 100644 (file)
--- a/rpi_promini/rpi_promini.ino
+++ b/rpi_promini/rpi_promini.ino
@@ -5,13 +5,13 @@
   RPI pin  Arduino
   RXD      TXD
   TXD      RXD
-  GPIO6    RST
+  BCM25    RST
   GND      GND
   +5V      RAW
 
            2    433Mhz receive
 //           3    433Mhz outdoor temperature sensor receiver # DISABLED
-           8    DHT22
+           8    DHT22 (VCC from arduino VCC)
            10   433Mhz send
            11   DS18B20
            12   315Mhz send
@@ -40,7 +40,7 @@ DallasTemperature sensors(&oneWire);
 int int_0 = 300; // ms
 int int_1 = 900; // ms
 int wait  = 2000; // ms
-int repeat = 20; // times (5 times seem a little low for sensors which are more than 10m away)
+int repeat = 5; // times (5 times seem a little low for sensors which are more than 10m away)
 
 void send_315(char *code) {
   Serial.print("send 315Mhz ");
@@ -78,8 +78,8 @@ DHT dht;
 
 #include "RunningAverage.h"
 
-RunningAverage temp_avg(20);
-RunningAverage hum_avg(20);
+RunningAverage temp_avg(10);
+RunningAverage hum_avg(10);
 
 // setup
 
@@ -114,11 +114,13 @@ unsigned long time = millis();
 void loop() {
   if ( millis() - time > 2000 ) {
     float t = dht.getTemperature();
-    if ( dht.getStatus() == 0 )
+    float delta_t = abs(t - temp_avg.getAverage());
+    if ( dht.getStatus() == 0 && delta_t < 10 )
       temp_avg.addValue( t );
     else dht22_errors++;
     float h = dht.getHumidity();
-    if ( dht.getStatus() == 0 )
+    float delta_h = abs(h - hum_avg.getAverage());
+    if ( dht.getStatus() == 0 && delta_h < 10 )
       hum_avg.addValue( h );
     else dht22_errors++;
     time = millis();