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Re: avrdude: invalid baud rate specified

Posted: Mon Apr 26, 2021 1:01 pm
by Pagkat
Update: I have no idea how, but suddenly it's working using the "USB Tiny" compiler settings. Plugging it out and in a few times might have done the trick? It's frustrating when it's not clear how a problem got solved...

I do have to use the reset button on the Arduino Micro to upload the code, which is not needed when using the Arduino IDE.

Re: avrdude: invalid baud rate specified

Posted: Sun Jul 11, 2021 12:17 pm
by andeug
I have the same problem, do you know how I can fix it?
Flowcode error.JPG
Flowcode error.JPG (91.84 KiB) Viewed 2257 times
There is no way to change the baud rate in Project Options.
Flowcode Project Options.JPG
Flowcode Project Options.JPG (70.27 KiB) Viewed 2257 times

Re: avrdude: invalid baud rate specified

Posted: Sun Jul 11, 2021 3:06 pm
by medelec35
Hi, andeug.
As the program is sent via Serial USB, invalid baud rate specified just mean not able to send the program to the target device.
The reason is usually the com port is not selected.
As you have n\a for programmer port, that is the issue.
You need to select the correct com port for the BL0055:
Correct port.png
Correct port.png (21.74 KiB) Viewed 2256 times
Look in your PC device manager with the BL0055 connected, is the correct comport showing there?
If not you may not have the correct drivers installed?
you can download the Arduino drivers from the Resources tab here.
After installing reload your flowchart so you can select the correct comport.
It's vital that the programmer port does not show n\a.

Re: avrdude: invalid baud rate specified

Posted: Sun Jul 11, 2021 4:33 pm
by andeug
Hi Martin,


Thank you for replying, I have actually found the source of my problem. I've looked over the datasheet of the BL0055 where it was saying:

"In the General Options tab select the correct COM port for the Arduino device. If no COM port is available then check your Arduino device is connected to the USB and that the USB driver is correctly installed. Please note the Arduino needs to be connected to the USB to allow it to be re-programmed. The E-block needs to be connected to the USB to allow Ghost (ICD/ICT) features."

So what I didn't do from the beginning was to connect the second USB type B cable into Arduino, as I thought that all it's being done through the micro USB port of the BL0055. :D

All works fine now.


Andreas