Open Access

Smart greenhouses using internet of things: case study on tomatoes

   | Jan 03, 2023

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Figure 1

Smart Greenhouse with ventilation and automated cooling and heating system.
Smart Greenhouse with ventilation and automated cooling and heating system.

Figure 2

Relation between temperature and humidity. RH Max, Maximum Relative Humidity; RH Min, Minimum Relative Humidity; Temperature, Absolute temperature degree; RTH, Normal Relative Temperature to Humidity level; TH Max, The Maximum Value of Threshold to Action.
Relation between temperature and humidity. RH Max, Maximum Relative Humidity; RH Min, Minimum Relative Humidity; Temperature, Absolute temperature degree; RTH, Normal Relative Temperature to Humidity level; TH Max, The Maximum Value of Threshold to Action.

Figure 3

Growing stages of tomato plant last about 100 days.
Growing stages of tomato plant last about 100 days.

Figure 4

Testing container dimensions.
Testing container dimensions.

Figure 5

Geographic location where experiment is conducted, Palestine, Hebron district.
Geographic location where experiment is conducted, Palestine, Hebron district.

Figure 6

Annual climate condition of testing area.
Annual climate condition of testing area.

Figure 7

Nitrogen Phosphorus Potassium sensor actual size.
Nitrogen Phosphorus Potassium sensor actual size.

Figure 8

IoT system to check and calibrate substants NPK in soil.
IoT system to check and calibrate substants NPK in soil.

Figure 9

A) Concentrations of NPK and
A) Concentrations of NPK and

Address Code Function Code Effective Number of bytes Nitrogen Value CRC_L CRC_H
0x01 0x03 0x02 0x00 0x20 0Xb9 0x9C

Recommended temperature of tomato greenhouse based on light levels

Minimum Temperature Low Light (Cloudy Days) High Light (Sunny Days)
Night 63°F (17°C) 64°F (18°C)
Day 66°F (19°C) 70°F (21°C)

Relative humidity ranges related to temperature in greenhouses

Temperature °F (°C) Relative humidity range
60 (16) 60%–75%
65 (18) 65%–80%
70 (21) 70%–80%
75 (24) 75%–85%
80 (27) 80%–85%
85 (29) 85%–90%
eISSN:
1178-5608
Language:
English
Publication timeframe:
Volume Open
Journal Subjects:
Engineering, Introductions and Overviews, other