Fixed number/string conversion error

client/src/app/led-presentation/led-presentation.component.ts

@@ -28,8 +28,8 @@ export class LedPresentationComponent implements OnInit {
     });
   }
 
-  onValueChange(currentValue: number, id: number) {
-    if (currentValue === 1) {
+  onValueChange(currentValue: string, id: number) {
+    if (currentValue === "1") {
       this.setOff(id);
     } else {
       this.setOn(id);