# Help needed with comparing inputs using msg.topic

**URL:** <https://discourse.nodered.org/t/help-needed-with-comparing-inputs-using-msg-topic/52258>\
**Category:** General\
**Created:** [15 October 2021 10:42 UTC](https://discourse.nodered.org/t/help-needed-with-comparing-inputs-using-msg-topic/52258 "2021-10-15T10:42:32Z")\
**Posts on this page:** 1\
**Showing post:** 5

<div class="post-metadata">

**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [15 October 2021 19:31 UTC](https://discourse.nodered.org/t/help-needed-with-comparing-inputs-using-msg-topic/52258/5 "2021-10-15T19:31:52Z")

</div>

If you already have the 8 channels and 8 hysteresis nodes set to provide a 1 if they need to be switched on then you don't need anything fancy, as any node outputting a 1 should be aa signal to act - not matter where it comes from... so just wire all of them into a node that just looks for a 1... or am I missing something ?

---

_[View the full topic](https://discourse.nodered.org/t/help-needed-with-comparing-inputs-using-msg-topic/52258)._