I cant connect with GUI

[cesaranud]

Some time ago, I was testing the sensor board gy-521. I use multiwwi 2.3.

viewtopic.php?f=6&t=4884&p=48666#p48666

In the end, everything worked fine. Now, I need to do the same setup, but using a arduino pro mini that runs at 3.3 volts. All connections are like the arduino 5V. But with arduino 3.3 volt I can not connect to the GUI. Why?

sensors......pro mini
SDA.............A4
SCL............. A5
vcc............. vcc
gnd............. gnd



programmer....... pro mini
rx......................tx
tx......................rx
3,3v................... vcc
gnd....................gnd



Thanks for your time.

[chrimbo]

Hello, 3.3 Volt Arduino pro mini typically run at 8MHz instead of 16MHz. So you can try to connect with half of the baudrate. In the GUI there is a settings tab which let you choose the baudrate.

[cesaranud]

As I can change it? I'm leaving the options but none is marked ... I need to be connected? offline?

Tks for your time...

[dfruehwald]

Did you load the MultiWii firmware onto the board?

It looks like you setup the com port but thae software is not talking back. When you clicked on Start the MultiWii version should have updated with the version you loaded onto the board.

[cesaranud]

i try reload it.

[dfruehwald]

Another thing to check, does Windows Device Manager see your board on the USB Hub?

If your board shows up as unknown device, you may need to istall the FTDI drivers, if it does not show up at all you may have a "charge only" usb cable.

[cesaranud]

The board in the ide was on 5v 16mhz. . Switch to 3.3v 8MHz and already recognized. I can already connect to the ide.

Thanks for your time.