I have several PCF8574P interface chips, this is an i2c to 8 I/O pins. You can use them for input or output and I have had great success with them when I was programming in python. I wanted to use them with Node Red, but I cannot seem to get a functional addition to the palette. I found: node-red-c…

This one looked promising... failed to load. # node-red-contrib-i2c It looks like it would have done exactly want I wanted too. :frowning:

Check permissions - also check out Peter Scargills blog - i am pretty sure a while ago there was lots on there about issues with i2c and RPi (and clones) and issues with permissions etc Craig

[image] Askjerry: failed to load What is the error? Did you raise an issue on the repo - could be a bug the Dev can fix.

Still new here... not sure what a REPO is nor how to raise an issue. The Raspberry Pi is a fresh install on a microSD card, i2c, serial, 1-wire, have been enabled. I successfully installed other palette objects, so that's not the problem. As for the error... here is the ERROR LOG. Error-Log.txt …

Maybe this may help? [image] Node-red-contrib-i2c fails to install General Have you checked the more detailed install debug log? Certainly that error doesn't really tell us much. What version of Rasbian are you using?

I have tried to install the I2C node as well, read the fails to install directions and never did get it in. Finally came to the decision if it was that much trouble I didn't want to use it as my application is fairly important and if that pi failed didn't want to jump through all the hoops to get an…

I maybe going the same direction also!

It looks like I will need to learn (or try to) how to create a palette object from some python code that I have which works. I was using wxGlade and/or an editor and Glade to write code before I discovered Node Red... so I have communicated with the chips. I guess my next step is to see to to creat…

Or maybe post an issue/question on the repo? It would be good for the community if that node was fixed.

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PCF8574P Chip via i2C

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I_iam 13 May 2020 01:10 7

Maybe this may help?

Topic		Replies	Views
Problems with PCF8574 Node General	4	1193	9 January 2020
So, Have A PCF8574, And Want To Use It Via Node Red? Share Your Projects	1	1172	27 September 2020
Pulling readings from i2c chip into Node-Red General	27	9595	13 April 2023
how i use "node-red-contrib-i2c 0.5.2" General	10	6448	26 May 2018
Problems with I2C in node-red on Raspberry Pi General	4	2116	13 July 2020

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PCF8574P Chip via i2C

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