Arduino nano 33 BLE sense classification result on OLED I2C display

#1

Hi,
is there a way to display the live classification result on an OLED I2C screen (128x32) using the Arduino nano 33 BLE sense?
I found this example for displaying sensor reading: https://github.com/kegedy/523-Assignments/blob/b42a7b360ce4dcf3f6e07fc6a2d4397b3bc2366b/SmartAlignment_arduino/arduino_display_BLE.ino
Thanks,
Wolf

#2

Hi @Wolf,

Sure this is something that you could do.
Using our Arduino libraries, you can directly retrieve the predictions data from the result structure:

    // print the predictions
    ei_printf("Predictions (DSP: %d ms., Classification: %d ms., Anomaly: %d ms.): \n",
        result.timing.dsp, result.timing.classification, result.timing.anomaly);
    for (size_t ix = 0; ix < EI_CLASSIFIER_LABEL_COUNT; ix++) {
        ei_printf("    %s: %.5f\n", result.classification[ix].label, result.classification[ix].value);

In the for loop you can then call the OLED I2C function to display the content of result.classification.

Aurelien

2 Likes
#3

Thanks a lot,
this sounds quite straight-forward. But I don’t think I can put this together easily. Is there an example that shows this, maybe with another board?
Wolf