PiBCI - Post #3 - Streaming Data from Huzzah32 Feather to a Raspberry Pi4

RE: PiBCI - Post #3 - Streaming Data from Huzzah32 Feather to a Raspberry Pi4

shabaz — Sat, 27 May 2023 20:05:48 GMT

I didn't know what BCI meant in your blog post, but just now had a look and now understand it means "Brain Computer Interface". This is something I don't know much about, but strongly think the 12-bit ADC will not work at all, without an amplifier, and there may be issues with fine-trimming gain to get around dynamic range. There's a huge difference between the 24-bit ADC you mention, and the 12-bit one in the microcontroller.

I guess you already know this since you mention this is a prototype of a prototype, but just wanted to let you know in case you were not aware.

RE: PiBCI - Post #3 - Streaming Data from Huzzah32 Feather to a Raspberry Pi4

ralphjy — Sat, 27 May 2023 19:52:50 GMT

The Huzzah32 board does have Bluetooth. Why do you think that it doesn’t? You should check the Arduino examples that are included with that board library.

RE: PiBCI - Post #3 - Streaming Data from Huzzah32 Feather to a Raspberry Pi4

shabaz — Sat, 27 May 2023 19:40:14 GMT

Hi,

I don't know Arduino too well, there's a possibility you need to set the pins as inputs. Normally there is a pinMode function call to set pins as inputs.

I have no idea if the microcontroller used for the Arduino, or the Arduino run-time, defaults to inputs or not. Personally I'd explicitly set them as inputs.

Something like this, in your setup() function:

[embed:dc8ab71f-3b98-42d9-b0f6-e21e02a0f8e2:cbf9ab58-c0dd-4662-b1ae-d88d21318d0b:type=c_cpp&text=%20%20%20%20%2F%2F%20set%20GPIO%20pins%20to%20input%20mode%0A%20%20%20%20for%20%28int%20i%20%3D%200%3B%20i%20%3C%20numPins%3B%20i%2B%2B%29%20%7B%0A%20%20%20%20%20%20%20%20pinMode%28gpioPins%5Bi%5D%2C%20INPUT%29%3B%0A%20%20%20%20%7D]

Incidentally, the code fragment I just pasted was generated by AI too, in case you're trying to do it all with AI.