From c181fac0ae52a94a1951214250720668bfca558e Mon Sep 17 00:00:00 2001
From: Jonas Smedegaard <dr@jones.dk>
Date: Wed, 2 Apr 2025 13:27:00 +0200
Subject: rewrite attitude #2 to also handle button press

---
 Mussel/Mussel.cpp                 | 35 +++++++++++++++++++++++++++++------
 Mussel/Mussel.h                   |  5 +++++
 Mussel/examples/minute/minute.ino |  5 +++--
 3 files changed, 37 insertions(+), 8 deletions(-)

(limited to 'Mussel')

diff --git a/Mussel/Mussel.cpp b/Mussel/Mussel.cpp
index b8cc4da..7cd7cf4 100644
--- a/Mussel/Mussel.cpp
+++ b/Mussel/Mussel.cpp
@@ -50,6 +50,16 @@ Mussel::Mussel(int attitude, uint8_t pin, uint8_t type)
 /// Setup function
 void Mussel::begin() {
   switch(_attitude) {
+    case 1:
+      _boolState = HIGH;
+
+      // reset timer
+      _time = millis();
+
+      // use INPUT_PULLDOWN to signal when the button is held down
+      // (not PULLUP which signals when it is released)
+      pinMode(_pin, INPUT_PULLDOWN);
+      break;
 #ifdef DHT_H
     case 3:
       mussel_dht.begin();
@@ -82,7 +92,7 @@ String Mussel::desc() {
 
   switch(_attitude) {
     case 1:
-      _str = "closed 10 seconds every 50 seconds";
+      _str = "closed 10 seconds every 50 seconds and on button push";
       break;
     case 2:
       _str = "closed 4 seconds every 8 seconds";
@@ -119,11 +129,24 @@ byte Mussel::read() {
 
   switch(_attitude) {
     case 1:
-      // 42 if current second modulo 60 is below 50, else 2
-      _byte = static_cast<byte>(
-        (static_cast<unsigned long>(millis() / 1000) % 60) < 50
-          ? 42
-          : 2);
+      if (digitalRead(_pin)
+        // TODO: account for rollover
+        or (millis() - _time) > MUSSEL_NORMAL_PACE * 1000
+      ) {
+        _byte = 2;
+        _boolState = HIGH;
+
+        // reset timer
+        _time = millis();
+      } else if (_boolState == HIGH
+        and (millis() - _time) > MUSSEL_STRESS_PACE * 1000
+      ) {
+        _byte = 42;
+        _boolState = LOW;
+
+        // reset timer
+        _time = millis();
+      }
       break;
     case 2:
       // 42 if current second modulo 12 is below 9, else 2
diff --git a/Mussel/Mussel.h b/Mussel/Mussel.h
index 3cce885..79f5017 100644
--- a/Mussel/Mussel.h
+++ b/Mussel/Mussel.h
@@ -15,6 +15,11 @@
 #define Mussel_h
 #include "Arduino.h"
 
+// seconds
+#define MUSSEL_NORMAL_PACE 50U
+#define MUSSEL_STRESS_PACE 10U
+
+// milliseconds
 #define MUSSEL_DEBOUNCE_DELAY 50U
 
 class Mussel {
diff --git a/Mussel/examples/minute/minute.ino b/Mussel/examples/minute/minute.ino
index 928537c..4bf59ce 100644
--- a/Mussel/examples/minute/minute.ino
+++ b/Mussel/examples/minute/minute.ino
@@ -1,7 +1,8 @@
 #include <Mussel.h>
 
-// instantiate with attitude #2
-Mussel mussel(2);
+// instantiate with attitude #2,
+// and pin 4 connected to a button
+Mussel mussel(2, 4);
 
 void setup() {
   Serial.begin(115200);
-- 
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