Teensy4.0 and MCP23008 i2c issue

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Razzorlight

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Hello, I would like to use a MCP23008 with the Teensy4.0.
I connected everything like other people did and it also works quite well with the help of an Arduino uno.
However, I don't know why it doesen't work with the Teensy and the Teensyduino software. Maybe the code is not suitable for the Teensy.

I would be happy to get some help.
 

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  • TestMCP23008.ino
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  • Test MCP23008.GIF
    Test MCP23008.GIF
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