# DS1990 1-wire support?

**URL:** <https://discourse.nodered.org/t/ds1990-1-wire-support/81104>\
**Category:** General\
**Created:** [7 September 2023 12:44 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104 "2023-09-07T12:44:14Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Jan\_Coetzer](https://avatars.discourse-cdn.com/v4/letter/j/278dde/32.png) [@Jan\_Coetzer](https://discourse.nodered.org/u/Jan_Coetzer)\
**Post date:** [7 September 2023 12:44 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104/1 "2023-09-07T12:44:14Z")

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Good afternoon community,

I am busy looking at DS1990A Serial Number i-buttons. My test hardware is running on a Pi W and node-red 3.0.2.

I see there is a _# node-red-contrib-1wire_ node that supports the 1-wire DS18B20 temp sensor.  
Do you use this node to read the DS1990A as well or is there a different node that support DS1990 specifically? I cannot seem to find anything on google.

Thanks any comments or pointers will be appreciated.

Jan

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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:** [7 September 2023 15:13 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104/2 "2023-09-07T15:13:19Z")

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> [@Jan\_Coetzer](#):
>
> I cannot seem to find anything on google.

This is the first I have heard about this device and if you can't fined anything with Google (neither could I) then you are exploring uncharted territory.

So give it a try and see what you get. Make sure to add a `catch` node connected to a `debug` node (set to display the complete msg object) to help look for problems.

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**Author:** ![Jan\_Coetzer](https://avatars.discourse-cdn.com/v4/letter/j/278dde/32.png) [@Jan\_Coetzer](https://discourse.nodered.org/u/Jan_Coetzer)\
**Post date:** [7 September 2023 15:23 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104/3 "2023-09-07T15:23:22Z")

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Thank you, I found some sample code for Arduino and tested it successfully on that platform.  
I will try your recommendation for raspberry pi.

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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:** [7 September 2023 15:34 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104/4 "2023-09-07T15:34:08Z")

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If you have code for an Arduino, and have MQTT on your network, you could try using a Wemos D1 Mini and have it read the device and then publish the data to your MQTT broker and use an `mqtt-in` node to subscribe to the voice to get the data into NR

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**Author:** ![Jan\_Coetzer](https://avatars.discourse-cdn.com/v4/letter/j/278dde/32.png) [@Jan\_Coetzer](https://discourse.nodered.org/u/Jan_Coetzer)\
**Post date:** [8 September 2023 06:31 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104/5 "2023-09-08T06:31:19Z")

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Thanks for your response, this is definitely also a good proposal,

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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:** [7 November 2023 06:31 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104/6 "2023-11-07T06:31:38Z")

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