Question 1

What does u201cColumn names in .csv do not match the sensors you selected. (See QeexoAutoML_User_Guide)u201d mean?

Accepted Answer

When uploading CSV files, you will be asked to create an Environment and select the sensors and their configurations. What you select here must match with what is described in the CSV file.

Question 2

Unable to perform Live Testing through Bluetooth connection. Error message shows u201cBluetooth is not connectedu201d even though the device is successfully paired.

Accepted Answer

Please make sure the u201cDiscoveryu201d option is not enabled in the Bluetooth Settings: Start -> Bluetooth & Other Device Setting-> More Bluetooth options -> Options tab -> Select Discovery (Allow Bluetooth devices to find this PC).

Question 3

Training is stuck on u201cCalculating Latencyu201d after everything else is complete in the u201cReal-Time Training Progressu201d view.

Accepted Answer

If the training appears to be stuck on Calculating Latency, it is likely due to the target hardware being disconnected from your machine. Since we calculate the latency by flashing the ML model onto the device to run live inferences and taking the average time, the process cannot be completed if the device is disconnected. You can exist out of the pop-up screen and still see Model training results without the latency. Click on the u201cErroru201d icon under the Latency column to try again after reconnecting the target hardware.

Question 4

Unable to skip the u201cGroup Labelsu201d step when starting a new training.

Accepted Answer

If you are in a Single-class classification project, multiple labels must be grouped into one single group before training can continue. If you are in a Multi-class classification project, you are able to skip this step.

Question 5

The u201cSTART NEW TRAININGu201d button is disabled and error shows u201cTraining may not begin until the previous training or upload has completed.u201d

Accepted Answer

Please make sure that there are no other trainings in session.

Question 6

In the Models Page, u201cLatencyu201d column shows u201cErroru201d.

Accepted Answer

Make sure the hardware is connected, then click the icon to measure latency again.

Question 7

I fail to start a new training and see u201cInsufficient amount of datau201d.

Accepted Answer

The Notifications page will tell you how much more data is needed to start a training.

Question 8

The button u201cFLASH DATA COLLECTION APPu201d is still greyed out and not clickable even though sensors have been selected.

Accepted Answer

Make sure to select the ODR and the FSR for the selected sensors.

Question 9

The blue highlighted region on the visualized signal displayed during u201cEventu201d data recording does not cover the appropriate signal.

Accepted Answer

For Event data to work properly, there needs to be periods of rest at the beginning and end of the recording, with the actual u201ceventu201d occurring in between. For example, if we are trying to collect a u201cCu201d gesture, we need to do the following:      1. Determine how long our u201cCu201d gesture will take.    2. Set the event length to be ~1 second longer than our length from step 1.    3. During collection, make sure the device is at rest during each start/stop operation u2013 this guarantees that we capture the full event within the recording range (i.e. the time between u201cstartu201d and u201cstopu201d).    4. Check the visualized signal to see whether the event appears clearly within the window and the appropriate portion is captured.

Question 10

After collecting data, I cannot find it on the training page.

Accepted Answer

On the training page, different datasets with the same sensor configurations and same label names are grouped. Please click the drop-down icon to see all datasets.

Question 11

Why is the performance of my models unsatisfactory? What can I do to improve model accuracy?

Accepted Answer

1. Go to the Details Page by clicking the u201cDetailsu201d icon in the Models Page, check Learning Curve to see whether you need more data.    2. Go to the Sensitivity Analysis page by clicking the u201cSensitivity Analysisu201d icon and try adjusting weights and re-compiling the library.    3. For more information, please refer to the Qeexo AutoML User Guide.

Question 12

Unable to flash Data Collection Application to the target hardware.

Accepted Answer

This could be caused by various situations.    1. Make sure your target hardware is connected and matches with the current project.    2. If your device in the Arduino Nano 33 BLE Sense, try pressing the reset button twice before starting to flash.    3. Try connecting the device via another port of your laptop.    4. Check if your computer is connected to the internet through a proxy. If so, temporarily disabling the proxy may fix the issue.

Question 13

Unable to flash Data Collection Application or machine learning models to the Arduino Nano 33 BLE Sense or Arduino Nano 33 IoT.

Accepted Answer

Ensure the latest Qeexo AutoML is installed. Visitu00a0https://automl.qeexo.com/resourcesu00a0to download and install the latest software package. Ensure the latest Qeexo AutoML is running, Start the application by clicking on the Qeexo AutoML icon. Ensure the device is connected to the computer. If all above criteria are met and Arduino device is still unable to flash, please do a double press on the reset button before flashing; the orange LED should slowly fade in and out to show that the board is in flashing mode.

Question 14

Connecting target device to a Macbook which has USB-C port through a USB-hub device doesnu2019t work.

Accepted Answer

The typical current consumption for normal mode is 33mA and it goes down to 29mA when it is in flash mode. However, this current consumption is not always stable when we use a USB-hub device. Sometimes, the current doesnu2019t come back to 33mA even though device is in normal mode.    This issue never happens when we use u201cUSB-C to USBu201d converter instead of using USB-hub. Based on this, we think USB-hub may not be able to drive enough power for our target device operation.

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