Drawbacks to using a pro mini as a serial gateway?

[kiesel]

Hi,

I am planing on using a pro mini as a serial gateway (to connect to my raspberry pi)

I saw in the serial gateway sketch, that it runs on a lower baud rate when run on a pro mini. Does that mean that messages will appear later on raspberry? Are there other drawbacks?

And is it correct that I simply connect rx/TX from the pro mini to tx/rx on the pi and that's it? Plus power and gnd, of course.

[electrik]

@kiesel the pro Mini is the same chip as an Arduino nano, so the speed will be the same for both

[kiesel]

@electrik

Thanks. So why the reduced baud rate than? Sorry, this is probably a noob question.

[electrik]

Maybe the clock frequency is different. So 8mhz instead of 16mhz for the nano.
But I remember you can still run at the same baud rate.
I don't think it will make a big difference anyway unless your sending lots of data.
If the baudrate is 9600, 10 characters will take 10ms to transfer.

[kiesel]

@electrik

Ah, I see there are Nanos with 8mhz and 16mhz, that's why I thought the baud rate of 34800 was specifically for the pro mini.

Do you know whether I just have to hook up TX and rx, power and gnd to the pi or whether I need something else? I am having trouble finding a description of how to do it without USB.

[electrik]

No just the Rx, TX and power should be enough.