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How is Strips Comfort reporting ambient light & temperature?

For Strips Comfort – the discreet temperature & LUX sensor, Sensative has developed an algorithm for ambient light reporting system that reports in regards to relevance. Instead of having a certain reporting interval, which is the norm, we have decided to focus on changes to bring down the total number of reporting, without losing accuracy & speed when light change happens.

Over the course of a whole day or a whole night, there are long periods of time where there are no significant changes in the lighting conditions; therefore the device reports the same LUX level over and over again. For a sensor that reports every 5 minutes it means that 288 reports are being sent during a 24 hour period. This results in the battery lifetime being affected. For Strips during a day with a normal amount of sunlight only 20 to 30 reports are sent during a 24 hour which is the main reason why a long battery lifetime is possible to achieve.

What Strips Comfort does is it reads the LUX sensor once per minute and makes a decision if it should send a report or not dependent on the difference in reading since last report sent. A new report is sent when the LUX value is double or half of the previous value sent, or if 24 hours have passed since the last reporting.

The human eye sensitivity is logarithmic in the same way as the ear is for sound levels, reacting to a relative change of energy rather than absolute levels. A change with a factor of 2 in light energy (LUX) is a noticeable change for the human eye.

Strips Comfort also has a filtering function to avoid temporary changes (such as headlights passing by) or if a person is passing by and blocking the sensor to trigger a report. The filtering levels are dependent on the mode set – normal or frequent. Normal reporting provides more filtering and frequent reporting has a lighter filtering allowing changes to more quickly pass through.

The graph below is an illustration of the Strips sensor placed on the inside of a window reporting the LUX values of sunlight over a 4 day period of time:

comfort lux

How often does Strips Comfort report temperature?

For Strips Comfort – the discreet temperature & LUX sensor, Sensative developed an algorithm for temperature reporting system that reports in regards to relevance. Instead of having a certain reporting interval, which is the norm, we have decided to bring down the total number of reportings without losing accuracy & speed when a temperature change happens.

Over the course of a whole day or a whole night, there are long periods of time where there are no significant changes in the temperature; therefore the device reports the same temperature over and over again. This can result in battery lifetime shortage. On the other hand, there are times when sudden and rapid changes in temperature happen frequently and for a device to capture these correctly, very frequently reporting has to be done.

What Strips Comfort does is it reads the temperature sensor once per minute and makes a decision if it should send a report or not according to the mode it is set: normal reporting or frequent reporting.

Normal reporting – as soon as a temperature difference of 2 degrees has occurred since the last report, a new report is sent. If it has been more than one hour since the last report, a difference of 1 degree also generates a new report. If 24 hours have gone by since the last report, a new report is always sent.

Frequent reporting – as soon as a temperature difference of 1 degree has occurred since the last report, a new report is sent. If more than 15 minutes have gone by since the last report and a temperature difference of 0.5 degrees has passed this also generates a new report. If 6 hours have gone by since the last reporting then a new report is always sent.

In the graph below you can see Strips (1) with frequent reporting (40-60 times per 24 hours) is compared with a sensor (3) that reports every 5 minutes (288 times per 24 hour). Even if Strips on average has far less reports sent, small rapid temperature changes were captured. Curve (2) is Strips with normal reporting (20-30 times per 24 hour). Typically, it is not common for a temperature sensor to be as accurate as Strips Comfort, with frequent reporting to track changes, to be compatible with battery longevity as this but due to this new algorithm it has been possible to combine accuracy with long battery life time.
new temp curve

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Strips Z-Wave 700 series Limited Warranty

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Mounting

Can I paint Strips with different colors?

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Does metal/aluminum affect Strips Functionality?

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Removing Strips from your Z-Wave network

How to remove/exclude your Strips Z-Wave

How to reset your Strips

Troubleshooting

Strips gateway compatibility list

How to create a stable Z-Wave network

Strips does not work with my Gateway. What should I do?

Does metal/aluminum affect Strips Functionality?

Strips Blink test

If a device doesn’t pair

How to remove Strips

Troubleshooting guide

How to manually wake-up Strips

How to remove/exclude your Strips Z-Wave

How to reset your Strips

Tech

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Strips gateway compatibility list

How to create a stable Z-Wave network

Strips Comfort Report Settings

How often is Strips Comfort reporting ambient light?

How is Strips powered?

What is the expected battery life?

How is Strips Comfort reporting ambient light & temperature?

I have lost the magnet. Can I use another magnet instead?

Can I replace the battery on Strips when it is done?

Is the battery rechargeable?

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