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What is the Node-S sampling frequency? Can it be adjusted?

Understanding how your Node-S samples, uploads, and sleeps helps you make sense of how often your data arrives, and why. This article walks through the cycle, how battery-saving mode affects it, and what can be adjusted.

The three stages of operation​

The Node-S repeats a cycle of three stages:

  • Sampling: the Node-S collects measurements from its onboard sensors (particulate matter, gases, and so on). By default, sampling lasts 90 seconds.
  • Uploading: once sampling is done, the Node-S sends the data to the cloud. This typically takes 60 to 120 seconds, depending on network connection quality.
  • Sleeping: after uploading, the Node-S enters a low-power state to conserve energy before the next cycle. By default, sleeping lasts 900 seconds.

Together, this cycle defines your data reporting period, how often your device reports data. By default, that's about 17 minutes.

Automated battery-saving mode​

The Node-S battery is designed to last up to 30 days without sunlight. During prolonged low sunlight, like in winter, automated battery-saving mode kicks in to extend battery life.

  • Sleeping period adjustment: as the battery level drops, the device sleeps longer between measurements to save power. When the battery recharges with more sunlight, it returns to its normal sleep period.
  • Battery voltage triggers: different battery voltage levels determine how much the device slows down or speeds back up.

In short, battery-saving mode keeps your device running efficiently in low-power conditions by adjusting how often it collects data, even without sunshine.

What can be adjusted​

Clarity can remotely tune your sampling period, sleeping period, and battery-saving voltage triggers based on your application and how much sunlight your site gets. If you're interested, email support@clarity.io, see also how to change the sampling frequency.

What's next​

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Still need a hand? Email us at support@clarity.io or create a support ticket, and our team will get back to you.

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