# Contrib i2c edit node settings for pcf8574

**URL:** https://discourse.nodered.org/t/contrib-i2c-edit-node-settings-for-pcf8574/31560
**Category:** General
**Created:** [14 August 2020 11:25 UTC](https://discourse.nodered.org/t/contrib-i2c-edit-node-settings-for-pcf8574/31560 "2020-08-14T11:25:12Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Jurg1505](https://avatars.discourse-cdn.com/v4/letter/j/3ab097/32.png) [@Jurg1505](https://discourse.nodered.org/u/Jurg1505)
#### Post date: [14 August 2020 11:25 UTC](https://discourse.nodered.org/t/contrib-i2c-edit-node-settings-for-pcf8574/31560/1 "2020-08-14T11:25:12Z")

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I can't find how to fill in the settings to set the output pins.

`sudo i2cdetect -y 1` gives

![Knipsel2](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/3/7/37bf7d05eba0eca102a6984a2ed183f40e9b2a9d.png)

![Knipsel](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/6/06b3a985bfc8a6e9811dc5aa8c8a4c5aba0887d8.png)

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### Author: ![edje11](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/edje11/32/572_2.png) [@edje11](https://discourse.nodered.org/u/edje11)
#### Post date: [14 August 2020 15:06 UTC](https://discourse.nodered.org/t/contrib-i2c-edit-node-settings-for-pcf8574/31560/2 "2020-08-14T15:06:15Z")

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Fill in on the line Bus address **0x20**

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### Author: ![Jurg1505](https://avatars.discourse-cdn.com/v4/letter/j/3ab097/32.png) [@Jurg1505](https://discourse.nodered.org/u/Jurg1505)
#### Post date: [15 August 2020 18:08 UTC](https://discourse.nodered.org/t/contrib-i2c-edit-node-settings-for-pcf8574/31560/3 "2020-08-15T18:08:55Z")

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It works, but not with a node.  
I have made a function.  
Here it is;  
[flows (7).json](https://discourse.nodered.org/uploads/short-url/LkTlh03QaA4FHBfxf7ZwajjExG.json) (11.0 KB)

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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: [29 August 2020 18:08 UTC](https://discourse.nodered.org/t/contrib-i2c-edit-node-settings-for-pcf8574/31560/4 "2020-08-29T18:08:56Z")

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