# Problem with number converting from mqtt retained messages

**URL:** <https://discourse.nodered.org/t/problem-with-number-converting-from-mqtt-retained-messages/21077>\
**Category:** General\
**Created:** [31 January 2020 10:33 UTC](https://discourse.nodered.org/t/problem-with-number-converting-from-mqtt-retained-messages/21077 "2020-01-31T10:33:54Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [4 February 2020 17:35 UTC](https://discourse.nodered.org/t/problem-with-number-converting-from-mqtt-retained-messages/21077/21 "2020-02-04T17:35:56Z")

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Ok, now I understand. you removed your original four `function` nodes and are now just joining the msgs coming out of the mqtt nodes. And the `mqtt` topic you subscribed to is what is in msg.topic and the actual topic's contain the slashes.

Put your four `function` nodesback in and `join` the outputs of them together and add a `debug` to the output of the `join` node and show the results.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [4 April 2020 17:35 UTC](https://discourse.nodered.org/t/problem-with-number-converting-from-mqtt-retained-messages/21077/22 "2020-04-04T17:35:57Z")

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