Revise sentence for updating data field

Author: chengweih001

index.bs

@@ -6356,7 +6356,11 @@ To <dfn>trigger a simulated characteristic event </dfn> given a [=navigable=] |n
     1. Set |params|[`"serviceUuid"`] to |service|'s <a>UUID</a>.
     1. Set |params|[`"characteristicUuid"`] to |characteristic|'s <a>UUID</a>.
     1. Set |params|[`"type"`] to |type|.
-    1. If |type| is `write`, set |params|[`"data"`] to a [=new=] {{Uint8Array}} wrapping a [=new=] {{ArrayBuffer}} containing |bytes|.
+    1. If |type| is `write`, run the following steps:
+        1. Let |data| be an empty list.
+        1. For each |byte| in |bytes|:
+            1. Append |byte|'s [=byte/value=] to |data|.
+        1. Set |params|[`"data"`] to |data|.
 1. Let |body| be a [=map=] matching the <code>bluetooth.CharacteristicEventGenerated</code> production, with the
     <code>params</code> field set to |params|.
 1. Let |relatedNavigables| be a [=/set=] containing |navigable|.
@@ -6401,7 +6405,11 @@ To <dfn>trigger a simulated descriptor event </dfn> given a [=navigable=] |navig
     1. Set |params|[`"characteristicUuid"`] to |characteristic|'s <a>UUID</a>.
     1. Set |params|[`"descriptorUuid"`] to |descriptor|'s <a>UUID</a>.
     1. Set |params|[`"type"`] to |type|.
-    1. If |type| is `write`, set |params|[`"data"`] to a [=new=] {{Uint8Array}} wrapping a [=new=] {{ArrayBuffer}} containing |bytes|.
+    1. If |type| is `write`, run the following steps:
+        1. Let |data| be an empty list.
+        1. For each |byte| in |bytes|:
+            1. Append |byte|'s [=byte/value=] to |data|.
+        1. Set |params|[`"data"`] to |data|.
 1. Let |body| be a [=map=] matching the <code>bluetooth.DescriptorEventGenerated</code> production, with the
     <code>params</code> field set to |params|.
 1. Let |relatedNavigables| be a [=/set=] containing |navigable|.