fix(fonts): skip preview API call for BDF bitmap fonts

The font preview endpoint explicitly rejects .bdf files (glyph rendering
not implemented server-side), returning 400. The JS didn't know this and
called the endpoint for every selected font, causing a noisy 400 on load.

Guard added in updateFontPreview(): if the selected font ends in .bdf,
show "Preview not available for BDF bitmap fonts" and return early instead
of hitting the API.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -132,15 +132,10 @@ The system supports live, recent, and upcoming game information for multiple spo
 | This project can be finnicky! RGB LED Matrix displays are not built the same or to a high-quality standard. We have seen many displays arrive dead or partially working in our discord. Please purchase from a reputable vendor. |
 
 ### Raspberry Pi
-- Raspberry Pi Zero's don't have enough processing power for this project.
+- Raspberry Pi Zero's don't have enough processing power for this project and the Pi 5 is unsupported due to new GPIO output.
-- **Raspberry Pi 3B, 4, or 5**
+- **Raspberry Pi 3B or 4 (NOT RPi 5!)**  
   [Amazon Affiliate Link – Raspberry Pi 4 4GB RAM](https://amzn.to/4dJixuX)
   [Amazon Affiliate Link – Raspberry Pi 4 8GB RAM](https://amzn.to/4qbqY7F)
-  - **Pi 5 users**: the installer automatically detects Pi 5 and builds the `rpi-rgb-led-matrix` library with RP1 support. If you previously installed on a Pi 4 and migrated the SD card, or if you see `mmap` errors in the logs, force a fresh library build:
-    ```bash
-    sudo RPI_RGB_FORCE_REBUILD=1 ./first_time_install.sh
-    ```
-  - Pi 5 config: leave `rp1_rio` at `0` (PIO mode, default) and set `gpio_slowdown` to `1` or `2`.
 
 
 ### RGB Matrix Bonnet / HAT
@@ -592,7 +587,7 @@ These settings control runtime behavior and GPIO timing:
   - **Critical setting**: Must match your Raspberry Pi model for stability
   - **Raspberry Pi 3**: Use 3
   - **Raspberry Pi 4**: Use 4
-  - **Raspberry Pi 5**: Use 1–2 in PIO mode (`rp1_rio: 0`, the default); start with `1` and increase if you see flickering
+  - **Raspberry Pi 5**: Use 5 (or higher if needed)
   - **Raspberry Pi Zero/1**: Use 1-2
   - Incorrect values can cause display corruption, flickering, or system instability
   - If you experience issues, try adjusting this value up or down by 1

first_time_install.sh

@@ -36,17 +36,9 @@ if [ -r /proc/device-tree/model ]; then
     DEVICE_MODEL=$(tr -d '\0' </proc/device-tree/model)
     echo "Detected device: $DEVICE_MODEL"
 else
-    DEVICE_MODEL=""
     echo "⚠ Could not detect Raspberry Pi model (continuing anyway)"
 fi
 
-# Detect Pi 5 for hardware-specific install decisions (RP1 library verification)
-IS_PI5=0
-if echo "${DEVICE_MODEL:-}" | grep -qi "Raspberry Pi 5"; then
-    IS_PI5=1
-    echo "Raspberry Pi 5 detected — will verify RP1 library support."
-fi
-
 # Check OS version - must be Raspberry Pi OS Lite (Trixie)
 echo ""
 echo "Checking operating system requirements..."
@@ -791,28 +783,9 @@ CURRENT_STEP="Build and install rpi-rgb-led-matrix"
 echo "Step 6: Building and installing rpi-rgb-led-matrix..."
 echo "-----------------------------------------------------"
 
-# On Pi 5, also check that the installed library has rp1_rio support.
+# If already installed and not forcing rebuild, skip expensive build
-# A library built before Pi 5 support was added imports fine but maps to the
-# Pi 3 peripheral bus address (0x3f000000) instead of the RP1 chip at runtime.
-_HAS_RP1=0
-if python3 -c 'from rgbmatrix import RGBMatrixOptions; assert hasattr(RGBMatrixOptions(), "rp1_rio")' >/dev/null 2>&1; then
-    _HAS_RP1=1
-fi
-
-_SKIP_BUILD=0
 if python3 -c 'from rgbmatrix import RGBMatrix, RGBMatrixOptions' >/dev/null 2>&1 && [ "${RPI_RGB_FORCE_REBUILD:-0}" != "1" ]; then
-    if [ "$IS_PI5" = "1" ] && [ "$_HAS_RP1" = "0" ]; then
+    echo "rgbmatrix Python package already available; skipping build (set RPI_RGB_FORCE_REBUILD=1 to force rebuild)."
-        echo "⚠ Pi 5 detected: installed rgbmatrix lacks rp1_rio support (older build)."
-        echo "  Forcing rebuild to get Pi 5 RP1 support..."
-    else
-        _SKIP_BUILD=1
-    fi
-fi
-
-if [ "$_SKIP_BUILD" = "1" ]; then
-    _skip_suffix=""
-    if [ "$IS_PI5" = "1" ]; then _skip_suffix=" with Pi 5 RP1 support"; fi
-    echo "rgbmatrix already installed${_skip_suffix}; skipping build (set RPI_RGB_FORCE_REBUILD=1 to force rebuild)."
 else
     # Ensure rpi-rgb-led-matrix submodule is initialized
     if [ ! -d "$PROJECT_ROOT_DIR/rpi-rgb-led-matrix-master" ]; then
@@ -879,17 +852,6 @@ except Exception as e:
 PY
     then
         echo "✓ rpi-rgb-led-matrix installed and verified"
-        # Pi 5: confirm the freshly-built library has rp1_rio support
-        if [ "$IS_PI5" = "1" ]; then
-            if python3 -c 'from rgbmatrix import RGBMatrixOptions; assert hasattr(RGBMatrixOptions(), "rp1_rio")' >/dev/null 2>&1; then
-                echo "✓ Pi 5 RP1 (rp1_rio) support confirmed"
-            else
-                echo "⚠ rp1_rio not found after rebuild — the submodule may be an older version."
-                echo "  Try updating the submodule and rebuilding:"
-                echo "    git submodule update --remote rpi-rgb-led-matrix-master"
-                echo "    sudo RPI_RGB_FORCE_REBUILD=1 ./first_time_install.sh"
-            fi
-        fi
     else
         echo "✗ rpi-rgb-led-matrix import test failed"
         exit 1

src/display_manager.py

@@ -110,10 +110,9 @@ class DisplayManager:
                     options.rp1_rio = runtime_config.get('rp1_rio')
                 else:
                     logger.warning(
-                        "rp1_rio is set in config but the installed rgbmatrix library does "
+                        "rp1_rio is set in config but the current RGBMatrixOptions "
-                        "not support it — the library was likely built without Pi 5 RP1 "
+                        "implementation does not support it (RGBMatrixEmulator or older "
-                        "support (mmap to 0x3f000000 instead of RP1 chip). "
+                        "library version) — value will be ignored"
-                        "Fix: sudo RPI_RGB_FORCE_REBUILD=1 ./first_time_install.sh"
                     )
             
             logger.info(f"Initializing RGB Matrix with settings: rows={options.rows}, cols={options.cols}, chain_length={options.chain_length}, parallel={options.parallel}, hardware_mapping={options.hardware_mapping}")