Hi,
Believing that I could connect it directly to my Computer, I ordered an Arduino Pro (because it's much cheaper). As I now noticed, connecting isn't as easy as I thought it to be. I just soldered an RS232 wire to the board, but the software doesn't recognize the board (I get the same error I would get with just nothing connected).
I found out, that I'll probably need a special FTDI chip, to connect my board (via USB).
I'm now wondering, if there ain't any easier (and cheaper) solution. I do also own an Arduino Duemillanove, maybe this would be the one making the connection.
Anyone any idea about that...?
You cant connect it directly to a "real" serial port on a PC. you need some kind of level shifting to convert the TTL serial to RS232 serial levels.
Or you need this:
to connect it to a USB port.
The cheaper boards come at a price :-).
The Arduino Pro boards strenght is the very low profile / small size, which is good i you need to build it ino something with limited space.
If you have connected it to your RS232 serial port on your computer then you may have blown it as the arduino uses 5V logic (if it is the 5V board, 3.3V for the 3.3V board) and the computer serial RS232 uses 12V logic. :o
You want one of these:
It's at a cost but it's one off and you can then use it for all the cheaper boards (with FTDI headers). If you are wanting to move from prototyping to a final product then it is what you need.
Mowcius
Thanks for the answers.
I guess I'll have to order one....
I hope I didn't blow it....at least the LEDs keep flashing, which is a good sign I think.
If they are both the same voltage, try unplugging the atmega chip from the Duemilanove and fit jumper wires from the programming pins of the chip to the programming header on the pro.
Edit: Let me make that a bit clearer. I mean the programming via bootloader pins so, Gnd, TXD, RXD and Reset pins unless you do a manual reset.
Unfortunaly I have the 3.3V version of the Arduino Pro...
Is it still possible, maybe with resistors?
Unfortunaly I have the 3.3V version of the Arduino Pro...
Is it still possible, maybe with resistors?
You would need a level shifter again for the 5v to 3.3v and 3.3v to 5v.
Same problem there as with the 1vV logic.
Regarding the FTDI header. If you have a 3.3v board then I recommend you purchase the 5v FTDI board as you can just cut a trace on the bottom of the board to make it 3.3v. Then if you need it 5v at any time, you can bridge the pads and make it 5v again.
Mowcius
You would need a level shifter again for the 5v to 3.3v and 3.3v to 5V
You can even ignore the 3.3V to 5V, the duemilanove works fine with that. I've used it a few times for programming other IC's.
You can even ignore the 3.3V to 5V, the duemilanove works fine with that.
I'm not sure if I got that right....You mean it is possible, to use the method jabber described?
You can even ignore the 3.3V to 5V, the duemilanove works fine with that. I've used it a few times for programming other IC's.
Not a good idea.
Buy an FTDI cable or breakout board. Easiest solution...
Mowcius