From 984031f95c227a062a32c4c2ca1fb5a0b4b2f9d0 Mon Sep 17 00:00:00 2001
From: Tilman <tliero@gmx.net>
Date: Fri, 18 Sep 2020 08:49:46 +0200
Subject: [PATCH] bugfix flare catch

---
 .../klingel_sender_nano_serial.ino            | 36 ++++++++++---------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/klingel_sender_nano_serial/klingel_sender_nano_serial.ino b/klingel_sender_nano_serial/klingel_sender_nano_serial.ino
index 266be1f..19d7054 100644
--- a/klingel_sender_nano_serial/klingel_sender_nano_serial.ino
+++ b/klingel_sender_nano_serial/klingel_sender_nano_serial.ino
@@ -1,33 +1,37 @@
 int ledPin = LED_BUILTIN;
 int buttonPin = 2; // Button connected to D2 and GND
-
-unsigned long lowTime = millis();
-unsigned long highTime = millis();
-unsigned long difference = 0;
+int flare_threshold = 30;
 bool active = false;
 
 void setup() {
   pinMode(ledPin, OUTPUT);
   pinMode(buttonPin, INPUT_PULLUP);
   Serial.begin(9600);
-  Serial.println("Starting button test");
+  Serial.println("Starting doorbell sensor");
 }
 
 void loop() {
   int val = digitalRead(buttonPin);
   
-  if (val == LOW && active == false) {
-    lowTime = millis();
-    difference = lowTime - highTime;
-    Serial.print("LOW ");
-    Serial.println(difference);
-    active = true;
+  if (val == LOW) {
+    delay(flare_threshold); // catch flares
+    val = digitalRead(buttonPin);
+    
+    if (val == LOW && active == false) {
+      Serial.println("RING");
+      digitalWrite(ledPin, HIGH);
+      active = true;
+      delay(250);
+    }
+    else if (val == HIGH) {
+      Serial.print("flare (<");
+      Serial.print(flare_threshold);
+      Serial.println(")");
+    }
   }
-  else if (val == HIGH && active == true) {
-    highTime = millis();
-    difference = highTime - lowTime;
-    Serial.print("HIGH ");
-    Serial.println(difference);
+  else {
     active = false;
+    digitalWrite(ledPin, LOW);
   }
+  
 }