Phase 2 - Thermal Printer (output)

While Yvonne had gotten the thermal printer to print previously, Clover could not get the thermal printer to physically print. After struggling for several hours over zoom with Yvonne, we decided that Clover would go in early before the demo and try to get it fixed in person. It turned out that the TX and RX cables were switched and the paper was stuck. Fortunately, these were easily fixed.

Phase 3 - ML model

This part was more complicated than either of us had expected, due to our lack of experience in interfacing with ML using Arduino.

Firstly, we couldn't import the Edge Impulse model into the Arduino. The zip file that Yvonne downloaded wasn't the correct one so when we tried to add it as a library to the Arduino file, it resulted in errors such as: "Error 13 INTERNAL: Library install failed: archive not valid: multiple files found in zip file top level"

Secondly, we only had 20 samples with which to train our model. This meant that the predictions our model were giving were not very accurate, but we decided this uncertainty would only add to the charm of the project as well as the idea of the ‘supernatural’. After looking at the examples given in the Edge Impulse Examples library and asking Zhenfang (TA) and other friends to explain parts that we did not understand, we were able to get parse the data so that it printed the length of the palm line when a hand was in range and the message "Hand is too far away; please move closer to sensors." when a hand was not.