# Quick note if you're a) reading multiple ds18b20's with a raspberry pi and b) struggling with flow stalls

**URL:** <https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747>\
**Category:** Hardware\
**Created:** [29 April 2020 14:02 UTC](https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747 "2020-04-29T14:02:07Z")\
**Posts on this page:** 3\
**Page:** 2

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**Author:** ![nrbrt](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/nrbrt/32/11738_2.png) [@nrbrt](https://discourse.nodered.org/u/nrbrt)\
**Post date:** [15 July 2020 20:01 UTC](https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747/22 "2020-07-15T20:01:24Z")

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The problem is easily solved by running a small script outside of node-red on the same pi, that reads the ds18b20 sensors and passes that information through to node-red by mqtt message or a network socket.  
I have this running 8 ds18b20 sensors for years now without any problem.  
[See thread here](https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747/8)

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**Author:** ![Brian5600](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/brian5600/32/94271_2.png) [@Brian5600](https://discourse.nodered.org/u/Brian5600)\
**Post date:** [25 July 2020 16:09 UTC](https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747/23 "2020-07-25T16:09:30Z")

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Hello meeki007  
Great I will give it a shot.  
I have also had some fun with the ds18b20 and Rpi.  
I have been looking at core Linux 1-wire driver and have not been alle to figure out how to convert and pull data from all sensors in a single pull and to keep it running stable with 20 sensors plus on a line. After hours/days the Rpi freeze. I have thought it might be the 1-wire library, that could not handle the emulation of the 1-wire bus.

Best regards Brian

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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:** [23 September 2020 16:09 UTC](https://discourse.nodered.org/t/quick-note-if-youre-a-reading-multiple-ds18b20s-with-a-raspberry-pi-and-b-struggling-with-flow-stalls/25747/24 "2020-09-23T16:09:32Z")

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Closed on 23 September 2020 16:09 UTC

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