Raspberry pi 5 GPIO, I2C, SPI

Well, he's only talking about i2c, using the GPIO for comms... not for directing landing i/o.

To the OP... he think he's referring to this thread that I initiated.

If you aren't completely stuck on PI5... I have had i2c working fine on Pi4B for many years.

I haven't picked up this effort on the Pi5/NodeRed/i2c as my customers have me more focused on projects utilizing the Ignition 8.3 SCADA at the moment.