fix: update 0x02 protocol to use byte offset instead of LED position offset

src-tauri/src/ambient_light/publisher.rs

@@ -430,10 +430,12 @@ impl LedColorsPublisher {
                 }
             }
 
-            let offset = group.start.min(group.end);
+            // Calculate byte offset based on LED position and LED type
+            let led_offset = group.start.min(group.end);
+            let byte_offset = led_offset * bytes_per_led;
             let mut tx_buffer = vec![2];
-            tx_buffer.push((offset >> 8) as u8);
-            tx_buffer.push((offset & 0xff) as u8);
+            tx_buffer.push((byte_offset >> 8) as u8);
+            tx_buffer.push((byte_offset & 0xff) as u8);
             tx_buffer.append(&mut buffer);
 
             udp_rpc.send_to_all(&tx_buffer).await?;

src-tauri/src/main.rs

@@ -182,8 +182,8 @@ async fn send_test_colors_to_board(board_address: String, offset: u16, buffer: V
     })?;
 
     let mut packet = vec![0x02]; // Header
-    packet.push((offset >> 8) as u8); // Offset high
-    packet.push((offset & 0xff) as u8); // Offset low
+    packet.push((offset >> 8) as u8); // Byte offset high
+    packet.push((offset & 0xff) as u8); // Byte offset low
     packet.extend_from_slice(&buffer); // Color data
 
     socket.send_to(&packet, &board_address).await.map_err(|e| {
@@ -351,8 +351,8 @@ async fn send_test_colors_to_board_internal(board_address: &str, offset: u16, bu
     let socket = UdpSocket::bind("0.0.0.0:0").await?;
 
     let mut packet = vec![0x02]; // Header
-    packet.push((offset >> 8) as u8); // Offset high
-    packet.push((offset & 0xff) as u8); // Offset low
+    packet.push((offset >> 8) as u8); // Byte offset high
+    packet.push((offset & 0xff) as u8); // Byte offset low
     packet.extend_from_slice(&buffer); // Color data
 
     socket.send_to(&packet, board_address).await?;