thank you and thank you for reporting back. I am glad you got it working.

@m5stack: Please check out this pull-request. Thank you.

Most of those functions return true if successful (and false otherwise).

Thanks
Felix

try to modify the M5Stack example like this:
replace:

#include <M5Stack.h>
M5.begin();
while (!extio.begin(&Wire, 21, 22, 0x45)) {

with:

#include <M5Core2.h>
M5.begin(true, false, true, true);
while (!extio.begin(&Wire, 32, 33, 0x45)) {

Thanks
Felix