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report [2024/06/17 00:30] – [7.4 Design] team1report [2024/06/19 21:40] (current) – [3.1 Scope] team1
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 ==== - Scope ==== ==== - Scope ====
-In order to be more precise about the scope of the project than in the introduction, from a project management point of view, the following objectives are to be achieved, also illustrated in Figure {{ref>scope}}: \\+In order to be more precised about the scope of the project than in the introduction, from a project management point of view, the following objectives are to be achieved, also illustrated in Figure {{ref>scope}}: \\
  - Initial research: First of all, initial research has to be done to find out the state of the art. At this point, the marketing analysis can be started, which will provide new strategies to innovate by following ethical and sustainable ideas.\\  - Initial research: First of all, initial research has to be done to find out the state of the art. At this point, the marketing analysis can be started, which will provide new strategies to innovate by following ethical and sustainable ideas.\\
  -   - 
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 The main idea was to build a device that reuses coffee grounds to grow edible mushrooms, while composing the coffee grounds. For the development of the mushrooms there should be a dark room for the mycelium growth and a light room for the fruit growth, because these are the ideal conditions. The main idea was to build a device that reuses coffee grounds to grow edible mushrooms, while composing the coffee grounds. For the development of the mushrooms there should be a dark room for the mycelium growth and a light room for the fruit growth, because these are the ideal conditions.
-After the mycelium growth is finished the small boxes need to move to the light room. To avoid energy consumption, the boxes are on a rail and move because of gravity. The sensors should check the humidity, air quality and temperature and by opening a valve on the water tank or turning the ventilation on it is possible to have an impact on the climate in the device. The water tanks are on top of the chambers to avoid the use of a pump.+After the mycelium growth is finished the small boxes need to move to the light room. To avoid energy consumption, the boxes are on a roller conveyor and move because of gravity. The sensors should check the humidity, air quality and temperature and by opening a valve on the water tank or turning the ventilation on it is possible to have an impact on the climate in the device. The water tanks are on top of the chambers to avoid the use of a pump.
  
 To improve the product a second drawing was made to optimize the function and to keep the price as low as possible. In Figure {{ref>drawing2}} you can see the second drawing. To improve the product a second drawing was made to optimize the function and to keep the price as low as possible. In Figure {{ref>drawing2}} you can see the second drawing.
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 <WRAP centeralign> <WRAP centeralign>
 <figure box1> <figure box1>
-{{:box1.png?1000|}}+{{:boxx1.png?1000|}}
 <caption>3D model 1</caption> <caption>3D model 1</caption>
 </figure> </figure>
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 <WRAP center centeralign> <WRAP center centeralign>
 <figure box2> <figure box2>
-{{:box2.png?1000|}} <caption>3D model 2</caption>+{{:boxx2.png?1000|}} <caption>3D model 2</caption>
 </figure> </figure>
 </WRAP> </WRAP>
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 <WRAP center centeralign> <WRAP center centeralign>
 <figure box3> <figure box3>
-{{:box3.png?1000|}} <caption>3D model 3</caption>+{{:boxx3.png?1000|}} <caption>3D model 3</caption>
 </figure> </figure>
 </WRAP> </WRAP>
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 === - Structure=== === - Structure===
-The schematic in the figure below represents the prototype, which is identical to the full design except for the exclusion of the CO₂ sensor, light sensor, and servo motor. In the prototype, the float switch will detect water in the water tank and send a message to the app to refill the tank. The AHT20 sensor will monitor humidity and temperature. Depending on these readings, the fan and valve can be activated. Instead of the difficult-to-obtain Mosfet 30N06L, the fan and valve are connected transistors. For a detailed step-by-step process, please refer to the explanation below the flowchart. The microcontroller ESP32 with CAM can capture images of the growing mycelium and send them to the app. For the prototype, AI detection will not be used, as training AI requires a large number of pictures and substantial time, making it infeasible for the prototype. The power on/off the device, there is a switch connected to an LED to indicate if the device is powered on.\\+The schematic in the figure below represents the prototype, which is identical to the full design except for the exclusion of the CO₂ sensor and light sensor and that only one instead of two cameras is used. In the prototype, the float switch will detect water in the water tank and send a message to the app to refill the tank. The AHT20 sensor will monitor humidity and temperature. Depending on these readings, the fan and valve can be activated. Instead of the difficult-to-obtain Mosfet 30N06L, the fan and valve are connected transistors. For a detailed step-by-step process, please refer to the explanation below the flowchart. The microcontroller ESP32 with CAM can capture images of the growing mycelium and send them to the app. For the prototype, AI detection will not be used, as training AI requires a large number of pictures and substantial time, making it infeasible for the prototype. To power on/off the device, there is a switch connected to an LED to indicate if the device is powered on.\\
 The detailed schematics are shown in the following Figure {{ref>prot}}.\\ The detailed schematics are shown in the following Figure {{ref>prot}}.\\
  
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 === - Hardware === === - Hardware ===
-Compared to the designed solution, the prototype will be made of wood and the small boxes will be made from everyday objects such as yogurt pots or halved milk cartons. The prototype will also be smaller to keep the material costs within budget. However, only the scale changes, not the construction itself. + 
-The materials for the prototype can be found in the Deliverables.+For the non-electrical parts of the prototype, the white expanded PVC sheets were reused from an old project for sustainability reasons. The dimensions of the prototype are almost the same as the proposed solution, except that the length has been reduced from 100 cm to 70 cm. The small boxes are made from reused ice-cream boxes. The top is made of acrylic glass. The difference in the proposed solution is that the acrylic glass should be recycled, but this is not so easily available. Another difference is that the water tank is an ice cream box on top of the unit, instead of being integrated into the design. Figure {{ref>prototype1}} and {{ref>prototype2}} show the prototype. 
 + 
 +<WRAP center centeralign> 
 +<figure prototype1> 
 +{{:img_2757.jpeg?800|}}<caption>Prototype opened doors</caption> 
 +</figure> 
 +</WRAP> 
 + 
 +<WRAP center centeralign> 
 +<figure prototype2> 
 +{{:img_2754.jpeg?800|}}<caption>Prototype closed doors</caption> 
 +</figure> 
 +</WRAP>
  
 === Power Budget Prototype === === Power Budget Prototype ===
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 The analysis reveals a maximum stress of 2.5 MPa. Given that the ABS material used can withstand at least 30 MPa, no stability issues are anticipated. However, it was noted that the plate intended to block light for the dark room sags by 25 mm in the middle due to its own weight. This issue will be resolved by adding some support to the upper plate. Otherwise, there are no significant deformations under normal load. The analysis reveals a maximum stress of 2.5 MPa. Given that the ABS material used can withstand at least 30 MPa, no stability issues are anticipated. However, it was noted that the plate intended to block light for the dark room sags by 25 mm in the middle due to its own weight. This issue will be resolved by adding some support to the upper plate. Otherwise, there are no significant deformations under normal load.
  
-Next, the maximum possible load uniformly distributed on the device was examined. At a load of 1000 kg on the device, only a small area exceeds the maximum stress, specifically at the middle attachment of the rail to the level, as seen in Figure {{ref>stress2}}. This element will be reinforced, as it was identified as a weak point, even though such high loads are not expected.+Next, the maximum possible load uniformly distributed on the device was examined. At a load of 1000 kg on the device, only a small area exceeds the maximum stress, specifically at the middle attachment of the roller conveyor to the level, as seen in Figure {{ref>stress2}}. This element will be reinforced, as it was identified as a weak point, even though such high loads are not expected.
  
 <WRAP center centeralign> <WRAP center centeralign>
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 </WRAP> </WRAP>
  
-The maximum stress occurs again, like in the second simulation, at the attachment of the rail to the level. This again confirms the presence of a weak point and justifies the reinforcement of the component, even though the maximum allowable stress is not exceeded.+The maximum stress occurs again, like in the second simulation, at the attachment of the roller conveyor to the level. This again confirms the presence of a weak point and justifies the reinforcement of the component, even though the maximum allowable stress is not exceeded.
  
 In conclusion, the analyses indicate that the product can withstand significant stresses and loads, thus meeting our durability and stability requirements. Additionally, material savings to reduce weight and cost could be considered. In conclusion, the analyses indicate that the product can withstand significant stresses and loads, thus meeting our durability and stability requirements. Additionally, material savings to reduce weight and cost could be considered.
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 </figure> </figure>
 </WRAP> </WRAP>
 +Now we are going to see how fast is the API to respond as the previous tests were more of stress tests. Table{{ref>test_table1}} holds the functional and performance (exchanged data size and latency) results of the implemented API. The
 +latency tests were made by making ten consecutive calls to each operation and
 +calculating the corresponding average and standard deviation values.
 +Table{{ref>test_table2}} presents the load impact in the longest operation (worst case). The load
 +tests consist in making 10, 100 and 1000 simultaneous requests to the operation
 +with higher average latency in table{{ref>test_table1}}.
  
 +<WRAP center centeralign>
 +
 +<table test_table1 >
 +<caption>API: functional and performance results</caption>
 +<WRAP box center leftalign 400px>
 +^ Operation ^ Method ^ Result ^ Size ( B ) ^ Average Latency (ms) ^ Latency Deviation (ms) ^
 +|Check | token | GET | OK | 207 | 6 | 0
 +|Connect | POST | OK | 332 | 9 | 7 |
 +|Disconnect | DELETE | OK | 334 | 7 | 3 |
 +|Get | Data | GET | OK | 331 | 6 | 3
 +|Get | User | GET | OK | 290 | 8 | 2
 +|Login | POST | OK | 426 | 21 | 7 |
 +|Logout | DELETE | OK | 245 | 25 | 10 |
 +|Register | PUT | OK | 315 | 14 | 1 |
 +</WRAP>
 +</table>
 +</WRAP> 
 +
 +<WRAP center centeralign>
 +
 +<table test_table2 >
 +<caption>API: load results</caption>
 +<WRAP box center leftalign 400px>
 +^Requests/Results ^ Operation ^ Method ^ Size ( B ) ^ Average Latency (ms) ^ Latency Deviation (ms) ^
 +|10/10 | Logout | GET | 245 | 36 | 11 |
 +|100/100 | Logout | GET | 245 | 28 | 8 |
 +|1000/1000 | Logout | GET | 245 | 763 | 331 |
 +</WRAP>
 +</table>
 +</WRAP>
 +These results show that the app provides a friendly user experience.
  Mqtt broker testing \\  Mqtt broker testing \\
 For the mqtt broker testing the [[https://github.com/inovex/mqtt-stresser|mqtt-stresser tool from inovex]] has been used. This tool works by creating a given number of clients and a given number of messages per client. Then all clients send messages continuously and each of them report if there is any missing message. The test has been done first using 10 clients sending 150 each and the second time 100 clients sending 50 messages each. Figures {{ref>mqtt_test1}} and {{ref>mqtt_test2}} show the results. For the mqtt broker testing the [[https://github.com/inovex/mqtt-stresser|mqtt-stresser tool from inovex]] has been used. This tool works by creating a given number of clients and a given number of messages per client. Then all clients send messages continuously and each of them report if there is any missing message. The test has been done first using 10 clients sending 150 each and the second time 100 clients sending 50 messages each. Figures {{ref>mqtt_test1}} and {{ref>mqtt_test2}} show the results.
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 To conclude, CoffeeMush was developed to be a smart device that makes mushrooms out of coffee grounds and mushroom spawn. It is designed to have two separate rooms: a dark room for the mycelium to develop and a light room for the mushrooms to grow.  To conclude, CoffeeMush was developed to be a smart device that makes mushrooms out of coffee grounds and mushroom spawn. It is designed to have two separate rooms: a dark room for the mycelium to develop and a light room for the mushrooms to grow. 
  
-There are multiple sensors to keep track of the conditions and adjust if necessary. The water level sensor, CO2 sensor, light sensor, temperature sensor and humidity sensor are connected to an application. The application shows the customer the conditions and notifies if the water tank needs to be refilled for example. When the humidity is too low, the valve automatically turns on, spraying water over the boxes. Besides these sensors there is also a ventilator in each room for circulation of the air. Additionally, there is a camera, which can take pictures of the boxes with mycelium or mushrooms to show in the app and to know if the box is ready to go into the light room. The boxes with coffee waste, mycelium and finally mushrooms move on a rail which is electronically controlled to move the box from the dark room to the light room.+There are multiple sensors to keep track of the conditions and adjust if necessary. The water level sensor, CO2 sensor, light sensor, temperature sensor and humidity sensor are connected to an application. The application shows the customer the conditions and notifies if the water tank needs to be refilled for example. When the humidity is too low, the valve automatically opens and increases the humidity. Besides the sensors there is also a ventilator for circulation of the air. Additionally, there are two cameras, which can take pictures of the boxes with mycelium and mushrooms to show in the app and to know if the box is ready to go into the light room. The boxes with coffee waste, mycelium and mushrooms move on a roller conveyor.
  
 In the electronic circuit, the sensors mentioned in the text above are connected to power. Additionally, there are components like a regulator, capacitor, resistor and transistor are added for safety and to make sure the right amounts of power are connected. In the electronic circuit, the sensors mentioned in the text above are connected to power. Additionally, there are components like a regulator, capacitor, resistor and transistor are added for safety and to make sure the right amounts of power are connected.
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 The packaging solution is a solution for reusing the package of the product. In the case of Coffeemush, the package is made to make two bags out of it. These bags can be made for transportation of coffee grounds or mushrooms. The bags are easily made out of the package; only the straps for the handles need to be adjusted. The material of the packaging is mycelium; a sustainable, renewable and degradable material. The packaging solution is a solution for reusing the package of the product. In the case of Coffeemush, the package is made to make two bags out of it. These bags can be made for transportation of coffee grounds or mushrooms. The bags are easily made out of the package; only the straps for the handles need to be adjusted. The material of the packaging is mycelium; a sustainable, renewable and degradable material.
  
-The functional tests are successfully done for the design of CoffeeMush, which finalizes the project of CoffeeMush. The next chapter will revise, conclude and dig deeper for further development.+The functional tests are done for the design of CoffeeMush, which finalizes the project of CoffeeMush. The next chapter will revise, conclude and dig deeper for further development.
 ===== - Conclusions ===== ===== - Conclusions =====
 ==== - Discussion ==== ==== - Discussion ====
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