You are operating an industrial IoT solution where devices are deployed on the shop-floor area of a manufacturing plant.
In addition to a number of simple temperature and humidity sensors, there are edge devices in your network with processing modules for each type of sensor.
In IoT Central you try to configure a rule to trigger alerts when the average temperature in the past 10 minutes exceeds 50 degrees and the humidity is less than 60%
Which of the following statements is true for the given scenario?
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A. B. C. D.Correct Answer: C.
Option A is correct because you can build rules from any valid telemetry data type.
The conditions are combined with logical AND operations.
The only exceptions are edge devices where telemetry from different modules cannot be combined.
Option B is incorrect because, actually you can.
You can have any mix of sensors and devices in your IoT network.
Option C is CORRECT because for edge devices, there is a limitation on setting rules: rules combining conditions on telemetry data originating from different modules on an edge device will result in an error and cannot be used.
Option D is incorrect because there is no such limitation in IoT Central.
When you add multiple conditions to a rule, they are evaluated True when all the conditions are True (there is an AND relationship between them).
Reference:
The correct answer is option D - You cannot use rules which combine conditions on several sensors.
Explanation: In the given scenario, there are simple temperature and humidity sensors, as well as edge devices with processing modules for each type of sensor. The goal is to configure a rule to trigger alerts when the average temperature in the past 10 minutes exceeds 50 degrees and the humidity is less than 60%.
Option A, "It is not allowed to set rules on telemetry from different modules," is incorrect. In IoT Central, it is possible to set rules on telemetry from different modules, as long as the modules are part of the same IoT device.
Option B, "You cannot have simple sensors and edge devices with the same type of sensors in the same network," is also incorrect. In fact, it is common to have both simple sensors and edge devices with the same type of sensors in the same network. This allows for a mix of low-cost sensors and more sophisticated edge devices to be used in the same IoT solution.
Option C, "You cannot set rules which combine conditions on data coming from different modules of the edge device," is also incorrect. In IoT Central, it is possible to set rules which combine conditions on data coming from different modules of an edge device, as long as the modules are part of the same IoT device.
Option D, "You cannot use rules which combine conditions on several sensors," is the correct answer. While it is possible to set rules on individual sensors, IoT Central does not currently support setting rules that combine conditions on data from multiple sensors. Therefore, in the given scenario, it would not be possible to configure a rule to trigger alerts based on both the average temperature and humidity readings.