ESP12E as our
MCU and we have three functionality :
SIM800connected to TX(GPIO1), RX(GPIO3)
Matrix Keypadconnected to
And we also need to communicate with an
RTC(DS3231) module via
So i'm wonder how we could do this?
Is it possible to share
I2C pins with any other pins ?
And BTW for some reason we can't use IO expander such as