Components work together? Olimexino328+MOD-GSM-EDGE/WIFI+MOD-PULSE+UEXTx5

[Lichtamberg]

Hey,

i want to plug following components together:

OLIMEXINO-328
MOD-GSM-EDGE (or MOD-WIFI)
MOD-PULSE (via SPI?? Or RS232?? I dont know)
UEXTx5 - Port splitter

Because I want to measure the pulse rate/oxygen and sent the measured data via GSM/WIFI to a server.

Since there is only one UEXT input on the Olimexino, i want to use the UEXT Splitter...

I tried to find out if MOD-GSM-EDGE/WIFI has problems when plugging MOD-PULSE onto the splitter, but i didnt understand how to find out if they work together..

Can you help me?
Thanks!

[Lichtamberg]

Could somebody tell me something?
Thanks

[MBR]

It seems that both modules use serial communication (UART). Unfortunately, this is the only one of the three possible types supported by UEXT (the other are SPI and I2C) that does not support multibple devices. I2C and SPI are master-slave type communication with multiple devices, but UART/RS232 works only as peer-to-peer with two devices only.