GPIO32 of M5core2 is always HIGH and cannot be used as input.

I want to use MBUS's G32 as input(digitalRead) instead of I2C.
If I actually do this, it will always be HIGH.

I thought it was strange, so I checked the status of the G32 with a multitester, and found that 3.3V is always output from the G32.

M5.begin is set up as follows, and the fourth I2CEnable is false.

M5.begin(true, true, true, false, kMBusModeInput);

Also, there is an EXT.I2C PULLUP in the lower right corner of the schematic, do I have to remove this pullup resistor to use it as input? Or is there a way to use it as input in software?

If anyone knows, please let me know.

I set it up based on what you said and it works.

I noticed later that m5-docs had the same thing.
I'm glad you explained it in detail. Thanks.

M5Stack does not start with 5V pin of M-BUS

I want to use the 5V pin of M-BUS to run m5stack. Because I want to use it on the PCB.

At first, the m5 was running on the PCB.
I had to remove and install the m5stack on the PCB several times.

I was just using the same program and suddenly it stopped running.

I thought that the m5stack was broken. However, with USB power supply, m5stack started.

I thought that one part of AXP192 was broken, but I could not determine it.

If anyone is using m5stack with power from 5Vpin, please let me know about this.