From b30c794160e7bad9533afcd08911a6d45fd98278 Mon Sep 17 00:00:00 2001
From: Florian Hotze <florianh_dev@icloud.com>
Date: Fri, 22 Dec 2023 23:28:28 +0100
Subject: [PATCH] [items] Fix posting/commanding Item with `undefined`

An error was thrown when undefined was sent to an Item, due to missing
handling of it.

Signed-off-by: Florian Hotze <florianh_dev@icloud.com>
---
 items/items.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/items/items.js b/items/items.js
index 41ff33fb..2ace8f19 100644
--- a/items/items.js
+++ b/items/items.js
@@ -63,6 +63,7 @@ const DYNAMIC_ITEM_TAG = '_DYNAMIC_';
  */
 function _toOpenhabString (value) {
   if (value === null) return 'NULL';
+  if (value === undefined) return 'UNDEF';
   if (typeof value === 'number' || typeof value === 'string') {
     return value;
   } else if (typeof value.toOpenHabString === 'function') {