updated models and code

cad/server-lid-Body-with-logo.mtl

@@ -0,0 +1,12 @@
+# Blender 5.1.0 MTL File: 'None'
+# www.blender.org
+
+newmtl SVGMat
+Ns 360.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.000000 0.000000 0.000000
+Ks 0.500000 0.500000 0.500000
+Ke 0.000000 0.000000 0.000000
+Ni 1.000000
+d 1.000000
+illum 2

main/main.ino

@@ -129,18 +129,45 @@ void connectMQTT() {
 }
 
 void handle_oled(float tempC, float humidity) {
-  char line1[20], line2[20], line3[20];
-  snprintf(line1, sizeof(line1), "T: %.1f C", tempC);
-  snprintf(line2, sizeof(line2), "H: %.0f %%", humidity);
-  const char* lvl = fanLevel > 0 ? LEVELS[fanLevel - 1].label : "0";
-  snprintf(line3, sizeof(line3), "Fan: %s L%s",
-           fanLevel > 0 ? "ON" : "OFF", lvl);
+  (void)humidity;
+  char tempStr[12];
+  snprintf(tempStr, sizeof(tempStr), "%.1f", tempC);
 
   u8g2.clearBuffer();
-  u8g2.setFont(u8g2_font_4x6_tr);
-  u8g2.drawStr(xOffset, yOffset,      line1);
-  u8g2.drawStr(xOffset, yOffset + 10, line2);
-  u8g2.drawStr(xOffset, yOffset + 20, line3);
+
+  // Large temperature reading + small °C suffix, centered as a unit.
+  u8g2.setFont(u8g2_font_logisoso22_tn);
+  int tempW = u8g2.getStrWidth(tempStr);
+  const int suffixW = 10;  // approx width reserved for "°C"
+  const int gap = 2;
+  int totalW = tempW + gap + suffixW;
+  int tempX = (128 - totalW) / 2;
+  int tempY = 46;
+  u8g2.drawStr(tempX, tempY, tempStr);
+
+  u8g2.setFont(u8g2_font_6x10_tr);
+  int suffixX = tempX + tempW + gap;
+  u8g2.drawStr(suffixX, tempY - 14, "o");
+  u8g2.drawStr(suffixX, tempY - 2, "C");
+
+  // Fan level indicator: 5 stacked bars at the bottom.
+  // Filled bars = current level, empty bars = remaining.
+  const int barCount = NUM_LEVELS;
+  const int barW = 18;
+  const int barH = 6;
+  const int barGap = 2;
+  const int barsW = barCount * barW + (barCount - 1) * barGap;
+  const int barY = 56;
+  int barX0 = (128 - barsW) / 2;
+  for (uint8_t i = 0; i < barCount; i++) {
+    int x = barX0 + i * (barW + barGap);
+    if (i < fanLevel) {
+      u8g2.drawBox(x, barY, barW, barH);
+    } else {
+      u8g2.drawFrame(x, barY, barW, barH);
+    }
+  }
+
   u8g2.sendBuffer();
 }