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Deployment guidelines

This section provides guidelines which you should follow when deploying sensors in a Site forest.

Important

Read this section carefully to ensure you are deploying devices, including sensors, to achieve effective fire detection. Failure to follow these guidelines will result in the system not working as designed.

Warning

AFTER SENSORS HAVE BEEN DEPLOYED, CALIBRATED AND SETTLED, DO NOT INTERACT WITH THE SENSORS AS THIS WILL CAUSE ERRORS WITH SENSOR VALUES AND COULD ALSO RESET THE SENSOR CALIBRATION. See Testing Guidelines.

General guidelines

When planning sensor deployments, we recommend the following:

Item Guideline Description
Location 80 m to 100 m apart from other sensors Install sensors to detect environmental air quality in a radius of 80 m to 100 m.
Range 1 km from Mesh or Border Gateways Install sensors no further than 1 km from either a Border Gateway or Mesh Gateway.
Sunlight Install in the direction where the sun would be at 12:00 noon Sensors need to be installed facing the sun at 12:00 noon (northern or southern hemisphere) to provide maximum exposure to sunlight (even in cloudy conditions).
Height on trees 3 m from forest floor To protect the sensor from human or animal interference, install the device 3m above the forest floor.
Component ratio 100 sensors to 1 Mesh Gateway. See Component ratios/ranges.
Sensor deployment density 80m to 100m / 400m to 500m Spacing between sensors should be 80 m to 100 m for areas of high human activity, 400 m to 500 m for areas of low human activity. See below for details.
Density values per hectare 0.7/ha to 0.1/ha Based on WUI (Wildland Urban Interface) we recommend 0.7/ha sensors for a dense WUI and 0.1/ha sensors for a sparse WUI. See below for details.

Sensor deployment guidelines

Guideline Description
Use the spacer to keep the sensor away from the tree bark. A 2cm spacer is provided to deploy the sensor slightly away from the trunk of the tree. This avoids direct contact with the tree and allows tree sap to flow down the tree behind the sensor. The spacer also helps keep the sensor away from the moisture in the tree. Furthermore, the spacer allows the sensor to hang vertically rather than laying directly against the bark of the tree which could cause it to tilt at an angle. Also, hanging the sensor vertically improves the radio range of the device.
Deploy the sensor on the tree 3 m above the forest floor. Dryad recommends installing the sensor on the tree trunk approximately 3 meters above the level of the forest floor. At this height, the device is most sensitive to fire detection and it obtains an increased amount of light on its solar cell. Furthermore, at this height it avoids disturbances from most human and animal interactions.
Sufficient sensors for a day's work Ensure you have brought sufficient sensors, treenails, spacers (and crop wire, if required) for the day's installation plans.
Sensor should face towards the sun (at 12:00 noon). Use a compass to identify true South (in the northern hemisphere) or true North (in the southern hemisphere). This maximizes the amount of light that hits the sensor's solar cell during the day.

Mesh Gateway deployment guidelines

Guideline Description
Unobstructed solar panel The device has a large built-in solar panel to provide for the Mesh Gateway's increase power requirements. However, the solar panel needs an unobstructed area to obtain sufficient sunlight to charge the device.
Direction towards sun at 12:00 noon The Mesh Gateway needs to be oriented towards the direction of the sun (where it would be at 12:00 noon). Use a compass to identify true South (in the northern hemisphere) or true North (in the southern hemisphere). This maximizes the amount of light that hits the solar panel.
Install 3m above forest floor If installed on a tree, install the Mesh Gateway at least 3 meters above the forest floor, depending on available sunlight in the location. At this height, the device has less interference from human or animal interactions.

Border Gateway deployment guidelines

Guideline Description
Needs clear line of site Whether the Border Gateway is installed on a tree or a pole, it needs a clear line of sight to communicate via wireless mobile networks or satellite communication.
Ethernet connectivity recommended We recommend providing the device with access to Ethernet connectivity.
3 meter height on trees or poles When deployed near public areas, we recommend deploying the device at least 3 meters above forest floor or ground level.
Deploy at edge of forest Place the device at the edge of a forest and, ideally, near a power supply.
Ensure a reliable power source The Border Gateway can obtain power from a mains power source, from PoE (Power over Ethernet) or from its solar panel.
Solar panel provides backup power supply To provide for a fallback power supply if a loss of power occurs, it uses the solar panel but it needs direct sunlight to maximize sunlight irradiation.

Further reading

To learn how to install Device IDs in the Silvanet Deployment app for sensors, Mesh Gateways and Border Gateways, see Install Device IDs.

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