Complete rewrite of Application

DisplayManager.cpp

@@ -0,0 +1,34 @@
+#include "DisplayManager.h"
+
+DisplayManager::DisplayManager()
+  : lcd(0x27, 16, 2), lastUpdate(0) {}
+
+void DisplayManager::begin() {
+  lcd.init();
+  lcd.backlight();
+  lcd.setCursor(0, 0);
+  lcd.print("Drybox v0.1");
+}
+
+bool DisplayManager::ready(unsigned long now) {
+  if (now - lastUpdate < interval) return false;
+  lastUpdate = now;
+  return true;
+}
+
+void DisplayManager::showText(String line1, String line2) {
+  if (line1 == lastLine1 && line2 == lastLine2) {
+    return;
+  }
+
+  lastLine1 = line1;
+  lastLine2 = line2;
+
+  lcd.clear();
+
+  lcd.setCursor(0, 0);
+  lcd.print(line1);
+
+  lcd.setCursor(0, 1);
+  lcd.print(line2);
+}