EPS@ISEP | The European Project Semester (EPS) at ISEP

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report [2015/06/23 17:33] – [7.2 Architecture] team1report [2015/06/23 19:14] (current) – [7.2 Architecture] team1
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 Concerning to the user experience, we want to give an intuitive and kind interaction between the product and the customer. The system is supported with an LCD display that shows directly to the user all the information needed to start the process. To interact with the system it is also required some keyboard or any kind of control to give the user the chance to select his different needs depending on the requirements on the food that is going to be dehydrated. Figures {{ref>a35}} and {{ref>a36}} illustrate the electronic schematics. Concerning to the user experience, we want to give an intuitive and kind interaction between the product and the customer. The system is supported with an LCD display that shows directly to the user all the information needed to start the process. To interact with the system it is also required some keyboard or any kind of control to give the user the chance to select his different needs depending on the requirements on the food that is going to be dehydrated. Figures {{ref>a35}} and {{ref>a36}} illustrate the electronic schematics.
 <figure a35> <figure a35>
-{{ :captura_de_pantalla_2015-04-23_a_las_2.38.46.png?700 |}}+{{ :captura_de_pantalla_2015-06-23_a_las_19.06.33.png?700 |}}
 <caption>//Electronics wiring diagram approximation//</caption> <caption>//Electronics wiring diagram approximation//</caption>
 </figure> </figure>
  
 <figure a36> <figure a36>
-{{ :captura_de_pantalla_2015-04-23_a_las_2.37.15.png?700 |}}+{{ :captura_de_pantalla_2015-06-23_a_las_19.12.57.png?700 |}}
 <caption>//Electronics graphic schematics approximation//</caption> <caption>//Electronics graphic schematics approximation//</caption>
 </figure> </figure>
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-Once the values are under control, it was thought to be necessarily considered the possibility of having a full range of different values in order to adequate the process to the kind of food desired to dehydrated by the user. This implies that the user needs to interact with the Arduino to be capable to select the proper program. That’s the main reason of having an LCD Shield with buttons in the electronic system. The LCD permits a visual interaction and the buttons permit the user to surf through a specific menu where it is shown a variety of foods to dehydrate. The use of an LCD and moreover the use of buttons requires also a specific library. Here is shown an example of the code used in the first test with LED, which includes both libraries and the conditions set for that occasion:+Once the values are under control, it was thought to be necessarily considered the possibility of having a full range of different values in order to adequate the process to the kind of food desired to dehydrated by the user. This implies that the user needs to interact with the Arduino to be capable to select the proper program. That’s the main reason of having an LCD Shield with buttons in the electronic system. The LCD permits a visual interaction and the buttons permit the user to surf through a specific menu where it is shown a variety of foods to dehydrate. The use of an LCD and moreover the use of buttons requires also a specific library. Here in Figure {{ref>a101}} is shown a flow chart of the code used for the Solar dehydrator
  
  
-<figure a50>+<figure a101>
 {{ :flowchart-001.jpg?600 |}} {{ :flowchart-001.jpg?600 |}}
 <caption>//Electronic system with humidity value over the maximum programmed for the test//</caption> <caption>//Electronic system with humidity value over the maximum programmed for the test//</caption>
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-The process now is more complex. The whole variety of products have to be set and the program has to know which food has been selected. This implies that when a food program is selected the whole rest of the code has to be obviated. A basic way to develop this program is by using counters and If statements. The counters are arbitrary values that work inside an If condition. Every time the If condition is accomplished, it’s added or subtracted one unit from this value. For example, every time the button Down is pressed, an arbitrary value called //x// which is //x// = 0 is added one, so the result would be //x// = 1. If it is pressed twice, //x// value would be //x// = 2. By this way it is possible to attach a singular value to each food and once the button Select is pressed, the //x// value is read by the program and knows which program was selected and needs to be read.+The process now is more complex. The whole variety of products have to be set and the program has to know which food has been selected. This implies that when a food program is selected the whole rest of the code has to be obviated. A basic way to develop this program is by using counters and If statements. The counters are arbitrary values that work inside an If condition. Every time the If condition is accomplished, it’s added or subtracted one unit from this value. For example, every time the button Down is pressed, an arbitrary value called //x// which is //x// = 0 is added one, so the result would be //x// = 1. If it is pressed twice, //x// value would be //x// = 2. By this way it is possible to attach a singular value to each food and once the button Select is pressed, the //x// value is read by the program and knows which program was selected and needs to be read. Otherwise, for menus with four or less than four products to select, each button but select and reset are coded directly to a single process. In this case, each of the buttons has its own variable in the code. This is used in the way that once a button is pressed, the process of the button is shown in the LCD, so the variable, for example u, turns from u = 0 to u = 1. Then button select is pressed and the process starts. In order to avoid multiple variables with value 1, which allows the code of a specific process be read, every time one button is pressed, it is not only changing its own variable, also the rest of the buttons variables turning them into value x = 0. Thanks to that coding, the Arduino will always run only one process at a time.
 ==== 7.5 Tests and Results ==== ==== 7.5 Tests and Results ====
  

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