Just as a test, added a third screen with graphics.

docs/hardware-notes.md

@@ -69,16 +69,3 @@ The physical wiring is already assembled. Current documented wiring is:
 ## Ground
 
 All component ground pins are connected to common `GND`.
-
-## Assumptions To Verify Later
-
-- The SH1106 module is compatible with the MKR1000 voltage levels
-- The AM2302 is powered within its supported operating range
-- The button pull-up arrangement matches the intended firmware logic
-- Available pins are sufficient for the display, sensor, and both buttons
-
-## Risks To Keep In Mind
-
-- OLED modules may vary by interface and initialization details
-- Sensor timing can be sensitive depending on the library used
-- Network-based features may require retry logic and fallback screen states

include/screens.h

@@ -0,0 +1,10 @@
+#ifndef SCREENS_H
+#define SCREENS_H
+
+#include <U8g2lib.h>
+
+void drawScreen1(U8G2 &u8g2);
+void drawScreen2(U8G2 &u8g2);
+void drawWeatherIconScreen(U8G2 &u8g2);
+
+#endif

src/carousel.cpp

@@ -5,9 +5,9 @@ const unsigned long pageInterval = 5000;
 Carousel::Carousel(Screen *screens, size_t screenCount)
     : screens_(screens),
       screenCount_(screenCount),
-      dirty_(true),
       currentIndex_(0),
-      nextUpdate_(pageInterval) {}
+      nextUpdate_(pageInterval),
+      dirty_(true) {}
 
 void Carousel::draw(U8G2 &u8g2)
 {
@@ -33,4 +33,4 @@ void Carousel::update(unsigned long now) {
   if (now > nextUpdate_) {
     nextScreen();
   }
-}
+}

src/main.cpp

@@ -3,32 +3,22 @@
 #include <Wire.h>
 
 #include "carousel.h"
+#include "screens.h"
 
 U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R2, U8X8_PIN_NONE);
 
-int lastButtonState = LOW;
-uint8_t buttonOne = A3;
-
-int number = 0;
-bool dirty = true;
-
-void drawScreen1(U8G2 &u8g2) {
-  u8g2.setFont(u8g2_font_ncenB14_tr);
-  u8g2.drawStr(0, 20, "Screen 1");
-}
-void drawScreen2(U8G2 &u8g2) {
-  u8g2.setFont(u8g2_font_ncenB14_tr);
-  u8g2.drawStr(0, 40, "Screen 2");
-}
+int lastButtonNextState = LOW;
+uint8_t buttonNext = A3;
 
 Screen screens[] = {
   { drawScreen1 },
-  { drawScreen2 }
+  { drawScreen2 },
+  { drawWeatherIconScreen }
 };
 Carousel carousel(screens, sizeof(screens) / sizeof(screens[0]));
 
 void setup() {
-  pinMode(buttonOne, INPUT);
+  pinMode(buttonNext, INPUT);
 
   u8g2.begin();
   u8g2.clearBuffer();
@@ -39,12 +29,11 @@ void loop(){
   const unsigned long now = millis();
   carousel.update(now);
 
-  const int currentButtonState = digitalRead(buttonOne);
-  if (lastButtonState == LOW && currentButtonState == HIGH) {
-      number += 10;
+  const int currentButtonState = digitalRead(buttonNext);
+  if (lastButtonNextState == LOW && currentButtonState == HIGH) {
       carousel.nextScreen();
   }
-  lastButtonState = currentButtonState;
+  lastButtonNextState = currentButtonState;
 
   if (carousel.consumeDirty()) {
     u8g2.clearBuffer();

src/screens.cpp

@@ -0,0 +1,44 @@
+#include "screens.h"
+
+namespace
+{
+void drawSun(U8G2 &u8g2, uint8_t x, uint8_t y)
+{
+  u8g2.drawDisc(x, y, 11);
+  u8g2.drawLine(x, y - 18, x, y - 14);
+  u8g2.drawLine(x, y + 14, x, y + 18);
+  u8g2.drawLine(x - 18, y, x - 14, y);
+  u8g2.drawLine(x + 14, y, x + 18, y);
+  u8g2.drawLine(x - 13, y - 13, x - 10, y - 10);
+  u8g2.drawLine(x + 10, y - 10, x + 13, y - 13);
+  u8g2.drawLine(x - 13, y + 13, x - 10, y + 10);
+  u8g2.drawLine(x + 10, y + 10, x + 13, y + 13);
+}
+
+void drawCloud(U8G2 &u8g2, uint8_t x, uint8_t y)
+{
+  u8g2.drawDisc(x + 18, y + 14, 12);
+  u8g2.drawDisc(x + 34, y + 8, 17);
+  u8g2.drawDisc(x + 52, y + 15, 13);
+  u8g2.drawBox(x + 17, y + 15, 38, 14);
+  u8g2.drawRBox(x + 8, y + 18, 58, 15, 7);
+}
+}
+
+void drawScreen1(U8G2 &u8g2)
+{
+  u8g2.setFont(u8g2_font_ncenB14_tr);
+  u8g2.drawStr(0, 20, "Screen 1");
+}
+
+void drawScreen2(U8G2 &u8g2)
+{
+  u8g2.setFont(u8g2_font_ncenB14_tr);
+  u8g2.drawStr(0, 40, "Screen 2");
+}
+
+void drawWeatherIconScreen(U8G2 &u8g2)
+{
+  drawSun(u8g2, 78, 22);
+  drawCloud(u8g2, 29, 24);
+}