Multiple MCP23071

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sandman
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Multiple MCP23071

#1 Post by sandman » 10 Sep 2018, 06:25

Hi ALL

Id like to expand a NodeMCU unit with more I/O. I understand I can use 2 or 3 port expanders as long as I use different I2C addresses ? The I/O for regular input switches and output relays stable ? I need at least 10 input and 10 outputs at a single point...

Thankyou..Peter

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grovkillen
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Re: Multiple MCP23071

#2 Post by grovkillen » 10 Sep 2018, 07:30

Yes they are reliable. Some PWM features are experiencing some buggy behavior at the moment if I don't remember it incorrectly. In any case it's working. Please try and come back here with any other questions you might have.
ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
ESP Easy Netscan [find units]
Sponsor ESP Easy, we need you :idea: :idea: :idea:

sandman
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Re: Multiple MCP23071

#3 Post by sandman » 10 Sep 2018, 08:16

Thankyou for the quick response.....is there a limit on the number of I/O devices in the configuration ie: 12 ? DO I need to alter the source and re-compile as I've read in earlier posts ?

Regards..Peter

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grovkillen
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Re: Multiple MCP23071

#4 Post by grovkillen » 10 Sep 2018, 08:27

If you need more that 12 tasks you need to recompile the bin yourself but we cannot support you with that. We might have time to do a dynamic way of doing things which would allow more than 12 but we are not (yet) doing this full time ;)
ESP Easy Flasher [flash tool and wifi setup at flash time]
ESP Easy Webdumper [easy screendumping of your units]
ESP Easy Netscan [find units]
Sponsor ESP Easy, we need you :idea: :idea: :idea:

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