can anyone direct me in the right direction on how the pin outs work on the io expansion and how do i address them in IDE hope post on right page thanks

Arduino Uno + IO Expander shield

Topic		Replies	Views
What is an I/O Expansion Board? General Electronics	7	29859	May 6, 2021
Arduino Uno i/o Expansion Shield General Guidance	8	14085	May 5, 2021
Cosa serve per aumentare le porte I/O? Hardware	9	4787	May 7, 2021
I/O expansion board or shield General Electronics	8	2452	May 6, 2021
Serial.read() when arduino is connected with io expansion Programming	30	5167	May 5, 2021