# New MCP23017 PCF8574 All-In-One node

**URL:** <https://discourse.nodered.org/t/new-mcp23017-pcf8574-all-in-one-node/60087>\
**Category:** Developing Nodes\
**Created:** [19 March 2022 19:43 UTC](https://discourse.nodered.org/t/new-mcp23017-pcf8574-all-in-one-node/60087 "2022-03-19T19:43:30Z")\
**Posts on this page:** 1\
**Showing post:** 49

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**Author:** ![PizzaProgram](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/pizzaprogram/32/19431_2.png) [@PizzaProgram](https://discourse.nodered.org/u/PizzaProgram)\
**Post date:** [28 May 2026 23:26 UTC](https://discourse.nodered.org/t/new-mcp23017-pcf8574-all-in-one-node/60087/49 "2026-05-28T23:26:29Z")

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1. Please edit your last message according to [this](https://discourse.nodered.org/t/how-to-share-code-or-flow-json/506).
2. there is already an interval = 100ms set via chip config.  
So Triggering via INSERT node makes nothing, just it will check for changes +1 times. (100ms = 10x checking pro sec.)

```json
{..., "chipType":"MCP23017", ..., "interval":100,}

```

1. If there is no change since last check, nothing will show.
2. Which debug are you checking? (`node-red-log` consol?)
3. You did not answer many of my questions.

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_[View the full topic](https://discourse.nodered.org/t/new-mcp23017-pcf8574-all-in-one-node/60087)._