From 325c4ed0c87962c0810d5606c15739cac34440e6 Mon Sep 17 00:00:00 2001
From: "E. Almqvist" <elalmqvist@gmail.com>
Date: Fri, 8 Oct 2021 10:13:27 +0200
Subject: [PATCH] Added clock source code

---
 progtil/clock/clock.ino | 106 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 progtil/clock/clock.ino

diff --git a/progtil/clock/clock.ino b/progtil/clock/clock.ino
new file mode 100644
index 0000000..05423ca
--- /dev/null
+++ b/progtil/clock/clock.ino
@@ -0,0 +1,106 @@
+#include <Arduino.h>
+#include <U8glib.h>
+#include <RtcDS3231.h>
+#include <Wire.h>
+#include <Adafruit_NeoPixel.h>
+#include <Servo.h>
+
+#define FONT_HEIGHT 12
+#define FONT_PADDING 2
+#define SERVO_PIN 9
+#define NEO_PIN 6
+#define NEO_LEDS 24
+
+#define SECOND_HAND 255, 0, 0
+#define MINUTE_HAND 0, 255, 0
+#define HOUR_HAND 0, 0, 255
+#define DECISECOND_HAND 255, 255, 255
+
+byte neoBright = 100;
+
+U8GLIB_SSD1306_128X64 oled(U8G_I2C_OPT_NONE);
+RtcDS3231<TwoWire> rtcModule(Wire);
+
+Servo servo;
+uint32_t leds[NEO_LEDS] = {0};
+
+Adafruit_NeoPixel ring = Adafruit_NeoPixel(NEO_LEDS, NEO_PIN, NEO_GRB);
+
+unsigned char hour, minute, second;
+uint64_t millisecond();
+float temp;
+
+unsigned short xoffset = 0;
+
+unsigned int getY(unsigned int row) {
+	return (row * (FONT_HEIGHT + FONT_PADDING)) + FONT_PADDING;
+}
+
+long getLightLevel() {
+	return analogRead(A0);
+}
+
+char *getLightPercent() {
+	long lightlevel = getLightLevel();
+
+	char str[4];
+	char *percent = itoa(100 - ((lightlevel * 100) / 1024), (char *)&str, 10);
+
+	char *percentStr = strcat(percent, "%");
+	return percentStr;
+}
+
+void setup() {
+	pinMode(A0, INPUT);
+	servo.attach(SERVO_PIN, 500, 2500);
+
+	ring.begin();
+	ring.setBrightness(neoBright);
+	ring.show();
+}
+
+void draw() {
+	oled.setFont(u8g_font_helvB10);
+
+	// Light percentile
+	char *percentStr = getLightPercent();
+	oled.drawStr(0, getY(1), percentStr);
+
+	// Time
+	RtcDateTime now = rtcModule.GetDateTime();
+	hour = now.Hour();
+	minute = now.Minute();
+	second = now.Second();
+	String timeStr = String(hour) + ":" + String(minute < 10 ? "0" : "") + String(minute) + ":" + String(second < 10 ? "0" : "") + String(second);
+	oled.drawStr(0, getY(2), timeStr.c_str());
+
+	// Temperature
+	temp = rtcModule.GetTemperature().AsFloatDegC();
+	String tempstr = String(temp) + " C";
+	oled.drawStr(0, getY(3), tempstr.c_str());
+
+	servo.write(map(temp, 18, 28, 0, 180));
+
+	// Clear leds
+	ring.clear();
+	for(int i = 0; i < NEO_LEDS; i++)
+		leds[i] = 0;
+	
+	// Map seconds, minutes and hours
+	leds[map(second, 0, 60, 0, NEO_LEDS)] += ring.Color(SECOND_HAND);
+	leds[map(minute, 0, 60, 0, NEO_LEDS)] += ring.Color(MINUTE_HAND);
+	leds[map(hour, 0, 24, 0, NEO_LEDS)] += ring.Color(HOUR_HAND);
+
+	for(int i = 0; i < NEO_LEDS; i++)
+		ring.setPixelColor(i, leds[i]);
+	
+	
+	ring.show();
+}
+
+void loop() {
+	oled.firstPage();
+	do {
+		draw();
+	} while (oled.nextPage());
+}