diff --git a/examples/led-matrix-painter/python/app_frame.py b/examples/led-matrix-painter/python/app_frame.py
index db66c9b..b72431b 100644
--- a/examples/led-matrix-painter/python/app_frame.py
+++ b/examples/led-matrix-painter/python/app_frame.py
@@ -3,6 +3,7 @@
 # SPDX-License-Identifier: MPL-2.0
 
 import json
+import re
 from arduino.app_utils import Frame
 
 class AppFrame(Frame):
@@ -146,10 +147,11 @@ def to_c_string(self) -> str:
         Returns:
             str: C source fragment containing a const array initializer.
         """
-        c_type = "uint32_t"
+        c_type = "uint8_t"
+        snake_name = re.sub(r'[^a-zA-Z0-9]', '_', self.name.lower())
         scaled_arr = self.rescale_quantized_frame(scale_max=255)
 
-        parts = [f"const {c_type} {self.name}[] = {{"]
+        parts = [f"{c_type} {snake_name} [] = {{"]
         rows = scaled_arr.tolist()
         # Emit the array as row-major integer values, preserving row breaks for readability
         for r_idx, row in enumerate(rows):