From fe3232cfe3049e73b2fbb88d29a1f17aaf1bb9e8 Mon Sep 17 00:00:00 2001
From: Kai Lauterbach <klaute@gmx.de>
Date: Mon, 16 May 2022 10:45:08 +0200
Subject: [PATCH] Debug output of windspeed calculation added.

---
 firmware/config.h        |  2 +-
 firmware/sensor_wind.ino | 12 ++++++++++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/firmware/config.h b/firmware/config.h
index 49753ac..cae52d4 100644
--- a/firmware/config.h
+++ b/firmware/config.h
@@ -27,7 +27,7 @@
 #define WIFI_MINIMUM_SIGNAL_QUALITY      10 // percent
 #define RESET_ESP_TIME_INTERVAL_MS  3600000
 
-#define ROTOR_LENGTH_KM              0.000105
+#define ROTOR_LENGTH_KM              0.000115
 #define WIND_SENSOR_MEAS_TIME_S           5.0
 #define SEC_TO_HOUR_FACTOR      (60.0 * 60.0)
 #define COUNT_TO_KMH            ((TWO_PI * ROTOR_LENGTH_KM /  WIND_SENSOR_MEAS_TIME_S) * SEC_TO_HOUR_FACTOR)
diff --git a/firmware/sensor_wind.ino b/firmware/sensor_wind.ino
index 6e61a71..cfda894 100644
--- a/firmware/sensor_wind.ino
+++ b/firmware/sensor_wind.ino
@@ -12,7 +12,8 @@ ICACHE_RAM_ATTR void _anemometerInterrupt()
 #endif
 }
 
-float wind_speed() {
+float wind_speed()
+{
   anemometerRotations = 0;
 
   int interruptNumber = digitalPinToInterrupt(ANEMOMETER_PIN);
@@ -21,6 +22,13 @@ float wind_speed() {
   delay(1000 * WIND_SENSOR_MEAS_TIME_S); // time to measure
   detachInterrupt(interruptNumber);
 
-  return (float)anemometerRotations * COUNT_TO_KMH;
+  // calculate the speed as km/h
+  float tmp_speed = (float)anemometerRotations * COUNT_TO_KMH;
+
+#ifdef DEBUG
+  Serial.print("Windspeed: " + String(tmp_speed));
+#endif
+
+  return tmp_speed;
 
 }