From 691c77ee984928b969f11e8a0b9e14d7800b47a7 Mon Sep 17 00:00:00 2001
From: Fisch <interfisch@gmx.net>
Date: Fri, 30 Oct 2020 17:51:03 +0100
Subject: [PATCH] implement anemometer

---
 platformio.ini |   9 ++++-
 src/main.cpp   | 107 ++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 110 insertions(+), 6 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index 3a50f74..25cc39d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -34,7 +34,7 @@ build_flags =
     -D dataBMP180_pressure_minchange=0.5
 
     -D SENSOR_TCS34725
-    -D dataTCS34725_lux_minchange=20
+    -D dataTCS34725_lux_minchange=10
     -D dataTCS34725_colortemp_minchange=100
 
     -D SENSOR_HS1101
@@ -45,6 +45,13 @@ build_flags =
     -D ML8511PIN=A0
     -D dataML8511_minchange=0.05
 
+    -D SENSOR_ANEMOMETER
+    -D ANEMOMETERPIN=D6 #Light Blue thicker cable (in distribution box)
+    -D dataAnemometer_minchange=0.5
+    -D dataAnemometer_readdelay=1000*10
+    -D dataAnemometer_senddelaymax=1000*60*2
+    # Cable from Anemometer: Black=GND, Blue=3v3, Brown=Signal (needs pullup (internal))
+
 lib_deps = 
     Adafruit BMP085 Library@1.1.0
     https://github.com/adafruit/Adafruit_TCS34725
diff --git a/src/main.cpp b/src/main.cpp
index eacab84..6fd5317 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -77,7 +77,7 @@ struct sensordata
   sensordata dataML8511;
   float getUV_ML8511(int pin);
   float mapfloat(float x, float in_min, float in_max, float out_min, float out_max);
-  float value_uvML8511=0;
+  float value_uvML8511=0; //uvIntensity (mW/cm^2)
 #endif
 
 
@@ -179,17 +179,35 @@ struct sensordata
   struct sensordata dataTCS34725_lux;
   struct sensordata dataTCS34725_colortemp;
   uint16_t value_colortemp, value_tcs_lux, value_tcs_r,value_tcs_g,value_tcs_b,value_tcs_c;
-
   unsigned long lastread_tcs34725=0;
 #endif
 
+#ifdef SENSOR_ANEMOMETER
+  // ## ANEMOMETER ##  
+  sensordata dataAnemometer;
+  //unsigned long anemometer_timeLastReset=0;
+  unsigned long anemometer_lasttimereset=0;
+  uint16_t anemometer_pulsecounter=0; //counted pulses since last reset
+  //boolean anemometer_update_flag=false;
+  //unsigned long anemometer_lastPulse=0; //time for max calculation
+  //uint16_t anemometer_mintime=65535; //minimum time for this minute
+  //#define ANEMOMETER_MINTIMES_SIZE 4
+  //uint8_t anemometer_mintimepos=0;
+  //uint16_t anemometer_mintimes[ANEMOMETER_MINTIMES_SIZE];
+
+  #define ANEMOMETER_PPMtoMPS 0.0208640462;
+
+  float value_anemometer=0; // [m/s]
+  
+  void ICACHE_RAM_ATTR interrupt_anemometer();
+  void updateAnemometer();
+#endif
+
 // data/homie/config.json hochladen mit platformio run --target uploadfs
 // config contains homie device name, mqtt ip and wifi credentials
 
 
 
-
-
 HomieNode sensorNode("sensors", "Sensors","sensors");  //id, name, type
 
 char tempstring[16]; //for dtostrf
@@ -339,6 +357,22 @@ void setup() {
     #endif
   #endif
 
+  #ifdef SENSOR_ANEMOMETER
+    pinMode(ANEMOMETERPIN,INPUT_PULLUP);
+    attachInterrupt(digitalPinToInterrupt(ANEMOMETERPIN),interrupt_anemometer,CHANGE); //anemometer interrupt
+    #ifdef dataAnemometer_minchange
+      dataAnemometer.minchange=dataAnemometer_minchange;
+    #endif
+    #ifdef dataAnemometer_readdelay
+      dataAnemometer.readdelay=dataAnemometer_readdelay;
+    #endif
+    #ifdef dataAnemometer_senddelaymax
+      dataAnemometer.senddelaymax=dataAnemometer_senddelaymax;
+    #endif
+    
+    
+  #endif
+
   
   //Homie_setFirmware(FW_NAME, FW_VERSION);
   //Homie_setBrand(FW_NAME);
@@ -406,6 +440,10 @@ void setup() {
     #endif
     sensorNode.advertise("colortemp");
   #endif
+
+  #ifdef SENSOR_ANEMOMETER
+    sensorNode.advertise("windspeed");
+  #endif
   
 
   Serial.println("connecting..");
@@ -866,6 +904,54 @@ void loop_TCS34725_colortemp()
 }
 #endif
 
+#ifdef SENSOR_ANEMOMETER
+void loop_anemometer()
+{
+  /*
+  if (anemometer_update_flag) {
+    anemometer_update_flag=false;
+    //anemometer_mintime=0;
+    for (int i=0;i<ANEMOMETER_MINTIMES_SIZE;i++){
+      if (anemometer_mintime<anemometer_mintimes[i] && anemometer_mintimes[i]!=0){ //use longest time (=slowest speed) in array as max speed, reduces false readings. =0 -> initial value, ignore (not enough roations counted)
+        anemometer_mintime=anemometer_mintimes[i];
+      }
+    }
+  }*/
+
+  sensordata &d=dataAnemometer;
+
+  bool _changed=false;
+  if (millis() >= (d.lastreadtime+d.readdelay)) {
+    uint16_t _anepulsesPerMinute=anemometer_pulsecounter/((millis()-anemometer_lasttimereset)/60000.0);
+    value_anemometer = _anepulsesPerMinute*ANEMOMETER_PPMtoMPS;
+    
+    if (abs((int)d.lastsentvalue-value_anemometer)>=d.minchange){ //int abs
+      _changed=true;
+    }
+    d.lastreadtime=millis();
+  }
+
+  if (_changed || millis() >= (d.lastsent+d.senddelaymax)) {
+    Serial.print("Sending windspeed. reason=");
+    if (_changed) Serial.println("change"); else Serial.println("time");
+    checkESPStatus();
+
+    Homie.getLogger() << "windspeed tcs " << ": " << value_anemometer << endl;
+    sensorNode.setProperty("windspeed").send(String(value_anemometer));
+
+    //reset when sent. makes it more accurate but keeps fast response
+    anemometer_pulsecounter=0; //reset counter
+    anemometer_lasttimereset=millis();
+    d.lastreadtime=millis(); //also set lastread time to avoid having 1 count with a low time = high windspeed
+        
+    d.lastsentvalue=value_anemometer;
+    
+    d.lastsent=millis();
+  }
+
+}
+#endif
+
 
 void loopHandler() {
 
@@ -919,7 +1005,9 @@ void loopHandler() {
     }
   #endif
 
-  
+  #ifdef SENSOR_ANEMOMETER
+    loop_anemometer();
+  #endif
 
 }
 
@@ -1080,6 +1168,15 @@ float getUV_ML8511(int pin) {
 #endif
 
 
+#ifdef SENSOR_ANEMOMETER
+void ICACHE_RAM_ATTR interrupt_anemometer()
+{
+  anemometer_pulsecounter++;
+}
+#endif
+
+
+
 /*##################################
 * ######## HELPER FUNCTIONS ########
 */