I have this setup connected to XIAO Grove Expansion board
GPS to Uart Port and OLED to IIC port and i seen to not be able to recognize either device… I am wondering if the UART and IIC are passing thru the sandwitch… anyone can test this? I tried to put on XIAO Expansion board… but cannot clear pogo pins and i do not have any standoffs at present…
FYI i seem to get functionality when using the
and Xiao Expansion Board setup
Hi there,
SO I’m thinking NO? on the pass thru, my guess, looks like it’s using them, and not as I2C …so
Got this one the other day , Plugged it in , add Meshtastic APP.
1,2,3 , SCanned with PHone , Paired 123456
Bob’s your Uncle… 
Shows it’s on the map , Green Check in the Cloud…
What’s with the Buzzer Pin and the Display capabilities?
I can plug it on either Dev board, so ? Still works…
HTH
GL 
PJ 
I’m on the Mesh!.. 
humm… yes it does seem the IIC is totally jammed according to that … but the UART should pass thru… unless they are using that too… UART is not bus capable
