Hi,
I just spent the night playing around with this thread as I also want to use the Octopus 1.1 for something other than a 3D Printer.
So here is what you do:
1.) Thank @zouden and @maxgerhardt maxgerhdt, they made it possible for me to get it going.
2.) Download maxgerhardt’s sample code above: nucleo-f446ze-with-arduino
3.) extract and such.
4.) Open the project folder in PlatformIO.
5.) Replace the Startup and loop code with this:
void setup() {
pinMode(LED, OUTPUT);
SerialUSB.begin(115200);
}
void loop() {
digitalWrite(LED, HIGH);
delay(1500);
digitalWrite(LED, LOW);
delay(500);
SerialUSB.println(“BLINK!”);
}
6.) Build the project.
7.) You should at the least have this status after it is done.
Environment Status Duration
octopus_minimal FAILED 00:00:04.129
octopus SUCCESS 00:00:04.939
nucleo_f446ze FAILED 00:00:04.217
8.) This will allow you to upload using the STM32CubeProg - STM32CubeProgrammer software for all STM32 - STMicroelectronics.
9.) next to the BQ logo there is a BOOT0 jumper that you need to short the two pins together.
10.) Plug the USB in.
11.) Press the reset button
12.) Watch this video: https://www.youtube.com/watch?v=VlCYI2U-qyM
13.) Upload like shown.
14.) Disconnect from the board in the STM32CubeProgrammer
15.) Disconnect the USB Cable.
16.) Remove Jumper.
17.) Plug USB back in and enjoy! 
18.) you can connect via a serial monitor and you will see “BLINK!” everytime it blinks.
19.) Thank @zouden and @maxgerhardt, they made it possible for me to get it going.
20.) Help others giving credit to: zouden and maxgerhdt.
Team work makes the dream work.
THANK YOU @maxgerhardt @zouden