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First of all, initialize the OLED using blocks in the OLED section as shown in the picture.
This part of the code allows the soil moisture sensor to measure and record down the electrical conductivity between the two fingers every few seconds for about a minute. Then, it calculates the average. This is the “calm” value when the user has not told any lies.
After the initial readings have been made and recorded, the moisture sensor now measures the average electrical conductivity over five seconds. If it is higher than the average added to the standard deviation, we can conclude that the user has an abnormally high electrical conductivity and is thus lying. Then, the LED screen would show an “X”shape.
To relieve your tired fingers, you can download the code below.