Table 2.
Cost of the developed system for each tank.
| Purpose | Item | Unitary Cost (€) | Units | Cost (€) | ||
|---|---|---|---|---|---|---|
| Sensors | Water quality | Temperature | NTCLE413E2103F520L | 0.62 | 1 | 0.62 |
| Conductivity | - | 0.48 | 1 | 0.48 | ||
| Turbidity | TSHG6200 IR LED | 0.75 | 1 | 0.75 | ||
| BPW83 IR photodetector | 0.38 | 1 | 0.38 | |||
| Oli layer | VLHW4100 White LED | 0.36 | 1 | 0.36 | ||
| BPW41N IR photodetector | 0.52 | 1 | 0.52 | |||
| Tank | Water level | GP2Y0A02YK0F level sensor | 15.23 | 1 | 15.23 | |
| Workers presence | TSHG6200 IR LED | 0.76 | 1 | 0.76 | ||
| BPW83 IR photodetector | 0.38 | 1 | 0.38 | |||
| Light | NORPS-12 LDR | 1.76 | 1 | 1.76 | ||
| Others | Fish presence | NSL 19M51 LDR | 0.55 | 30 | 16.5 | |
| Feed falling | Jtron OV7670 300KP VGA | 5.35 | 1 | 5.35 | ||
| Humidity | HCZ-D5-A Humidity sensor | 1.45 | 3 | 4.35 | ||
| Node | Node | Node compatible with Arduino | 6.7 | 3 | 20.1 | |
| Memory system | Micro SD Card reader | 2.19 | 3 | 6.57 | ||
| Micro SD Card 4 Gb | 0.82 | 3 | 2.46 | |||
| Transmission system | ESP8266 WiFi module | 1.58 | 3 | 4.74 | ||
| Multiplexors | CD74HC4067 16-Channel MUX | 0.45 | 2 | 0.90 | ||
| 74LVC1G3157 Single-Pole Double-Throw Analog Switch | 0.45 | 1 | 0.45 | |||
| Other | Resistances | 0.5 | 10 | 5 | ||
| Total | 87.66 | |||||