From a5d9cb72b5ff351c239bb20c4a091fe42b892239 Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <valhalla@trueelena.org>
Date: Mon, 1 May 2023 16:22:52 +0200
Subject: ESP32 rewrite: ring an alarm until a button is pressed.

---
 arduino_sketch/fuzzy_alarm_clock_esp32/config.h    | 14 ++++
 .../fuzzy_alarm_clock_esp32.ino                    | 82 +++++++++++++++++++---
 2 files changed, 87 insertions(+), 9 deletions(-)

diff --git a/arduino_sketch/fuzzy_alarm_clock_esp32/config.h b/arduino_sketch/fuzzy_alarm_clock_esp32/config.h
index 1e505b2..ae8ca57 100644
--- a/arduino_sketch/fuzzy_alarm_clock_esp32/config.h
+++ b/arduino_sketch/fuzzy_alarm_clock_esp32/config.h
@@ -10,6 +10,20 @@
 // See https://github.com/esp8266/Arduino/blob/master/cores/esp8266/TZ.h
 #define TZ "CET-1CEST,M3.5.0,M10.5.0/3"
 
+// Alarms
+#define ALARM_PIN 1
+// Sound of the alarm: frequencies, and NFREQ should be the length of freq
+#define NFREQ 9
+int freq[] = { 255, 192, 128, 96, 64, 96, 128, 192, 255 };
+
+// Button
+#define BTN_PIN 2
+
+// RGB LED
+#define LED_R_PIN 7
+#define LED_G_PIN 8
+#define LED_B_PIN 10
+
 // Create the file local_config.h in this directory and override all of the
 // #defines you need
 #include "local_config.h"
diff --git a/arduino_sketch/fuzzy_alarm_clock_esp32/fuzzy_alarm_clock_esp32.ino b/arduino_sketch/fuzzy_alarm_clock_esp32/fuzzy_alarm_clock_esp32.ino
index 297b938..b5d725a 100644
--- a/arduino_sketch/fuzzy_alarm_clock_esp32/fuzzy_alarm_clock_esp32.ino
+++ b/arduino_sketch/fuzzy_alarm_clock_esp32/fuzzy_alarm_clock_esp32.ino
@@ -7,8 +7,17 @@
 #include "time.h"
 #include "sntp.h"
 
+#include <Colours.h>
+
 WiFiClient wifiClient;
 
+Colours colours(LED_R_PIN, LED_G_PIN, LED_B_PIN);
+
+bool ringing = false; // the alarm should be ringing
+bool pressed = false; // the button has been pressed
+
+hw_timer_t * timer = NULL;
+
 void connect_wifi() {
     WiFi.begin(WIFI_SSID, WIFI_PASS);
     Serial.print("WiFi ");
@@ -26,27 +35,82 @@ void connect_wifi() {
         }
     }
     Serial.println(" connected");
+    colours.writeHSV(180, 255, 8);
+}
+
+void ring_alarm() {
+    for (int i=0; i<NFREQ ; i++) {
+        tone(ALARM_PIN, 100000 / freq[i], 100);
+    }
+}
+
+void button_pressed() {
+    pressed = true;
+}
+
+void check_status() {
+#ifdef DEBUG
+    Serial.print("Checking the statuses: ");
+    Serial.print(ringing);
+    Serial.print(pressed);
+    Serial.println();
+#endif
+    if ( ringing ) {
+        ring_alarm();
+    }
+    if ( pressed ) {
+        ringing = false;
+    }
+    struct tm timeinfo;
+    if(!getLocalTime(&timeinfo)){
+        Serial.println("No time available (yet)");
+        return;
+    }
+    Serial.print("Time is: ");
+    Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
+    Serial.println(&timeinfo);
 }
 
 void setup() {
     Serial.begin(115200);
-#if defined(DEBUG)
+#ifdef DEBUG
     Serial.setDebugOutput(true);
 #endif
+    Serial.println("Starting setup");
+    pinMode(ALARM_PIN, OUTPUT);
+    pinMode(BTN_PIN, INPUT_PULLUP);
+
+    colours.writeHSV(0, 255, 8);
 
     configTzTime(TZ, NTP_SERV_1, NTP_SERV_2);
 
+    // Connect to the wifi and wait 5 seconds for ntp to have configured the
+    // time
     connect_wifi();
+    delay(5000);
+
+    attachInterrupt(digitalPinToInterrupt(BTN_PIN), button_pressed, HIGH);
+
+#ifdef DEBUG
+    Serial.print("pin to interrupt");
+    Serial.println(digitalPinToInterrupt(BTN_PIN));
+#endif
+
+    // Enable a timer to check for the status every second
+    /*
+    timer = timerBegin(1, 80, true);
+    timerAttachInterrupt(timer, &check_status, true);
+    timerAlarmWrite(timer, 1000000, true);
+    timerAlarmEnable(timer);
+    */
+
+    // temporary set ringing to true so that we do something
+    ringing = true;
 
 }
 
 void loop() {
-    delay(5000);
-    struct tm timeinfo;
-    if(!getLocalTime(&timeinfo)){
-        Serial.println("No time available (yet)");
-        return;
-    }
-    Serial.print("Time is: ");
-    Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
+    check_status();
+    delay(1000);
+
 }
-- 
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