ESP Easy & PCF8574 Input Module

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stormframe
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Posts: 2
Joined: 31 Jul 2018, 21:38

ESP Easy & PCF8574 Input Module

#1 Post by stormframe » 01 Aug 2018, 13:22

Hello,
im trying to get the Input Module from Horter&Kolb running.
I2C Adress is found and i can receive the Status from each Cannel / Port.

https://www.horter.de/i2c/i2c-input-mod ... ibung.html

MY QUESTION:
How do i have to Connect / Configure the INT Signal, because it takes a "very" long time before the Register of the PCF is pulled to the ESP?

Regards :)

Shardan
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Posts: 1156
Joined: 03 Sep 2016, 23:27
Location: Bielefeld / Germany

Re: ESP Easy & PCF8574 Input Module

#2 Post by Shardan » 01 Aug 2018, 20:34

How much is "Very"?

I have some remotes using PCF8574 and it usually takes about a second until the push is received.

As fas as i know there is no INT with the PCF-plugin so there is no hardware connection for INT.

At this time I'm assembling some new remotes with the MCP23017. I'm not sure if that will work faster.

Regards
Shardan
Regards
Shardan

stormframe
New user
Posts: 2
Joined: 31 Jul 2018, 21:38

Re: ESP Easy & PCF8574 Input Module

#3 Post by stormframe » 10 Aug 2018, 17:31

Hi.
Thx for the answer....
I found the Problem.... to easy...
No pull up for sda scl.
With pull up i have no Problem

Thx and regards
Michael

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