"Bottom" IO expander pinout
maxic62 last edited by maxic62
Hello everybody !
I've ordered M5Stack Basic kit and I'm preparing my project.
I'm not able to find any schematic / picture that describes the link between MBus to IO of the Bottom module
MBus have 30 pins with 20 GPIO
Following Bottom module picture:
Bottom module come with 46 pins with 30 IO...
I can figure out connection for 5V, 3V3, GND, RST, BAT but for the other ???
2 pins are named "DA". What does it mean ?
"R0"/"T0": RX/TX from UART 1 ?
"R2"/"T2": RX/TX from UART 2 ?
"2" means GPIO2 ? So what "G2" means ?
Anyone can help ? Do you have a document regarding that ?
Many thanks for your help,
reaper7 last edited by reaper7
Names on the right side correspond to the GPIO numbers on the left and are connected together.
higher DA mean GPIO25
lower DA mean GPIO26
R0/T0 = GPIO3/GPIO1 -> uart0
R2/T2 = GPIO16/GPIO17 -> uart2
Similarly, bottom names applies to the gpio numbers at the top.
maxic62 last edited by
Thanks you so much for your reply !
So, right now I'm understanding that I will have half IO than expected...
Thanks again, It helps me a lot