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Supplemental Information

Figure 1: Locations of 4ONSE-MOD and 4ONSE-PCB stations

DOI: 10.7287/peerj.preprints.27224v1/supp-1

Figure 2: Oxidized BME sensor

DOI: 10.7287/peerj.preprints.27224v1/supp-2

Figure 3: (a) Soil moisture sensor (b) Corroded soil moisture sensor

DOI: 10.7287/peerj.preprints.27224v1/supp-3

Figure 4: (a) Calibration curve of the soil moisture sensor at the beginning (b) Calibration curve of the soil moisture sensor after one month

DOI: 10.7287/peerj.preprints.27224v1/supp-4

Figure 5: Soil moisture sensor developed by stainless steel tubes

DOI: 10.7287/peerj.preprints.27224v1/supp-5

Table 1: Environmental parameters, sensors used and reasons for selection

DOI: 10.7287/peerj.preprints.27224v1/supp-6

Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

B H Sudantha conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools.

Emeshi J Warusavitharana analyzed the data, contributed reagents/materials/analysis tools, prepared figures and/or tables, authored or reviewed drafts of the paper, approved the final draft.

Rangajeewa Ratnayake approved the final draft.

P K.S. Mahanama approved the final draft.

Massimiliano Cannata conceived and designed the experiments, performed the experiments, performed the computation work.

Daniele Strigaro conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, performed the computation work.

Data Deposition

The following information was supplied regarding data availability:

Raw data / code will submit at the end of the project.

Funding

This work was supported by the Swiss Agency for Development and Cooperation (SDC) and Swiss National Science Foundation (SNSF). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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