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| report:dvp [2026/06/22 18:02] – [7.5.1.2 Electronics] team4 | report:dvp [2026/06/22 19:10] (current) – [7.6.3 Software] team4 |
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| ==== 7.6 Prototype ==== | ==== 7.6 Prototype ==== |
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| The prototype is designed to measure similar parameters to a CTD (Conductivity, temperature and Depth) system, but instead of using a conductivity sensor to estimate salinity, it uses a TDS sensor. This is a significantly cheaper alternative and is sufficient for early-stage testing, where the main goal is to validate the system concept rather than achieve final measurement accuracy. The pH sensor is also excluded from the prototype in order to reduce cost, since it is not essential for testing the basic functionality of the system. Apart from the sensor selection and reduced measurement precision, the prototype follows the same general system design as the final product. For the enclosure, a simple airtight plastic container (e.g. from IKEA) is used as a temporary solution. This significantly reduces costs compared to waterproof enclosures and is sufficient for controlled testing environments. To ensure watertight cable penetrations in the prototype, a silicone‑based sealant will be used. The same sealant may also be applied around the enclosure lid if leakage is detected during testing. | The prototype is designed to measure similar parameters to a Conductivity, temperature and Depth (CTD) system, but instead of using a conductivity sensor to estimate salinity, it uses a TDS sensor. This is a significantly cheaper alternative and is sufficient for early-stage testing, where the main goal is to validate the system concept rather than achieve final measurement accuracy. The pH sensor is also excluded from the prototype in order to reduce cost, since it is not essential for testing the basic functionality of the system. Apart from the sensor selection and reduced measurement precision, the prototype follows the same general system design as the final product. For the enclosure, a simple airtight plastic container (e.g. from IKEA) is used as a temporary solution. This significantly reduces costs compared to waterproof enclosures and is sufficient for controlled testing environments. To ensure watertight cable penetrations in the prototype, a silicone‑based sealant will be used. The same sealant may also be applied around the enclosure lid if leakage is detected during testing. |
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| The system is an automatic water quality logger built on an Arduino Uno. It continuously reads data from several sensors and writes the measurements to a CSV file on an SD card every 10 seconds. The system is controlled by a switch that pauses and resumes logging without requiring a restart. | The system is an automatic water quality logger built on an Arduino Uno. It continuously reads data from several sensors and writes the measurements to a Comma-separated values (CSV) file on an SD card every 10 seconds. The system is controlled by a switch that pauses and resumes logging without requiring a restart. |
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| **Libraries** | **Libraries** |
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| When the logging interval has passed, the software retrieves the current time from the RTC module and writes the timestamped sensor data to the SD card. After the data is saved, the program returns to the switch check and repeats the process continuously. This flow ensures that the prototype automatically collects and stores environmental data in a structured way. Figure {{ref>fig:flowchart}} shows the software flowchart of the Maris Habitats prototype. | When the logging interval has passed, the software retrieves the current time from the RTC module and writes the timestamped sensor data to the SD card. After the data is saved, the program returns to the switch check and repeats the process continuously. This flow ensures that the prototype automatically collects and stores environmental data in a structured way. Figure {{ref>fig:flowchart}} shows the software flowchart of the Maris Habitats prototype. |
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| <WRAP centeralign> | <WRAP centeralign> |
| <figure fig:flowchart> | <figure fig:flowchart> |
| {{ :report:maris_habitats_flowchart.png?nolink&600 |}} | {{ :0:flowchart_prototype.png?600 |}} |
| <caption>Software flow chart</caption> | <caption>Software flow chart</caption> |
| </figure> | </figure> |