Using Adafruit TCA9548A multiplexer with MCP23017 I2C with QT5 application running on raspberry pi 4
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wrote on 11 Mar 2022, 17:58 last edited by
Hello everybody.
I'm looking everywhere but can't find a way to use TCA9548A multiplexer combined with MCP23017 on a raspberry pi 4 so in theory I can add up to 1024 (128x8) GPIOS to a Raspberry pi which I'm using to run my QT desktop application. I already programmed the application and works perfect using Wiring Pi to communicate with the MCPs but I can only add up to 8 MCP as addresses go from 0x20 - 0x28 (using the A0,A1,A2 pins on each MCP module to do so) Now what I want to achieve is to add 7 more sets of 8 MCPS each to have up to 64 MCPs to deliver 1,024 GPIOs in total. I'm kind of developing a wire harness tester and need several hundreds of GPIOs to this purpose. So to make this simple as possible, I just need to know if there is a way to add more than 8 MCPS (I2C) to the raspberry pi and controlling all and each pins on the MCPs thru a QT5 application. Thank you! -
wrote on 11 Mar 2022, 18:45 last edited by
This sounds like a question better suited for a RaspberryPi forum.
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