ESP32 S3 with PCF 8575, Inputs 1 and 2 Not Working. OpenPLC Editor
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Junior Member 2 posts JaredOC Junior Member 2 posts
JaredOC
Hi Guys,

I have a problem with my Kincony T16M with a ESP32-S3 and PCF8575 expanders. Inputs 1 and 2 not operating when I upload the code via OPENPLC editor. All other Inputs and Outputs operate as they should. I tried custom code using Arduino IDE and using factory firmware and input 1 and 2 operates as they should. Has anyone come across this problem before?
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thiagoralves Admin  8,403 posts
thiagoralves
OpenPLC does not support PCF8575 expanders. How are you using them with OpenPLC? Did you write an Arduino Extension?
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JaredOC Junior Member 2 posts
JaredOC
Yes there are extensions for the PCF8575's and modified the baremetal.ino to suit. In OPENPLC editor, the I/0 configuration for Digital Inputs and Outputs, Analogs etc have been left blank.
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thiagoralves Admin  8,403 posts
thiagoralves
Well, then check your modifications. Most likely something is off in your code.
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richw Senior Member 121 posts
richw
Are the variables in your Arduino extension code being passed to PLC side set as external?
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