Hook up arduino directly to serial?

Projects Programming
1

I was wondering, how do I connect an arduino directly to a serial port? I am making a project to monitor temperature, and would like to be able to send that info directly to a serial port, not through USB, and monitor it in a command prompt shell or whatever program could do that(not the arduino serial monitor).

How can I do this without using the RX and TX pins? I plan on using an attiny 84 for this project, so is there a way to configure other pins to work for this? Also a wiring diagram from the arduino/attiny to the serial port would be handy.

2

on a 84 you are limited to software serial, think 9600 is the best your going to get out of it and yes you can pretty much use any pins

for serial conversion theres more than one way to skin a cat but for a buck

MAX232N Texas Instruments | Integrated Circuits (ICs) | DigiKey Marketplace

you will also need 5 100nf (0.1uf) caps to use that, but its pretty simple to wire up vs

http://www.kmitl.ac.th/~kswichit/ap275/ap275.htm

or

http://shop.moderndevice.com/products/p4

3

Ok, do you think that one of these would work as well? Seems that if it did it would save space, I'm just not sure how I would wire it in.

I ask because I plan on having the female (or male, I forget) connection so that I can use a DB9 cable to connect the device to the PC

4

hmm well the one you linked is a rs232 to serial adapter, so I'd think the ebay one should work fine. I'm gonna order three or four later today. The worst part is having to wait for it to get here.