I am unable to train a model on an 18-channel spectra data of the AS7265X sensor.
I collected excitation-emission (EEM) spectra data from my experiment, but I am struggling to train a regression model in the Edge Impulse Studio. The data is fluorescent intensities of samples P+D mixed in ratios
Sample 1: P=100%, D=0%;
Sample 2: P=75%, D=25%;
Sample 3: P=50%, D=50%;
Sample 4: P=25%, D=75%; and
Sample 5: P=0%, D=100%.
This mixture has been considered for different conditions, resulting in 5 CSV files with 106 timestamped rows.
Initially, I had challenges uploading CSV according to the Edge Impulse documentation. But later, it was intermittently successful in uploading but failed in feature extraction, or sometimes it complained of the label and, other times, the timestamp, which can be visible in the CSV files.
I thought using the forwarder may ease up, so, using the forwarder this time,
$edge-impulse-data-forwarder --baud-rate 230400
I could connect and stream the data; the attached image shows a screenshot. But for the past three days, I have been at the same spot; the training would fail and issue the following report show below.
Just trying out weird things, I attempted classification, and it went through but with 0% accuracy and 93 Loss. Yes, I wasn’t expecting anything.
The fail report:
" Failed to start job: Not all labels are numeric, this is required for regression models
Application exited with code 1
Job failed (see above).
"
This is the data from the serial port; the first is the timestamp, followed by the 18 channels’ data:
92,0,0,0,0,0,0,13,0,0,0,10,0,13,11,13,9,0,0
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
90,0,0,0,0,0,0,13,13,0,11,2560,0,13,11,0,0,0,0
This is how I streamed the data from the serial port to the PC. The structured data is passed to the forwarder when connecting as:
timestamp,Ch1,Ch2,Ch3,Ch4,Ch5,Ch6,Ch7,Ch8,Ch9,Ch10,Ch11,Ch12,Ch13,Ch14,Ch15,Ch16,Ch17,Ch18
timestamp: sampling time
Spectra data = Ch [1- 18]
This same structure is maintained for the different blending ratios of P and D.
I left the split ratio to the default 80/20.
I can’t see where the non-numeric data comes from, but the error persists.
I had more screenshot but limited by the first-time user policy
I will appreciate any available guidance.
The hardware are STM32H723 and AS7265X.