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| || | ||  |  ___||   ____      / _ \\    / ___// 
| || | ||  | ||__    |    \\   / //\ \\   \___ \\ 
| \\_/ ||  | ||__    | [] ||  |  ___  ||  /    // 
 \____//   |_____||  |  __//  |_||  |_|| /____//  
  `---`    `-----`   |_|`-`   `-`   `-` `-----`   
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Text this: Classification of pH levels using a mobile phone