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Setup & pairing

Set up Terrestream

Power the sensor, pair it with the app, connect Wi-Fi, then place it where air can circulate.

Setup & pairing

Pair with app

Use the passkey shown on the device screen and complete claiming within the pairing window.

Wi-Fi & network

Wi-Fi won’t connect

Check 2.4 GHz Wi-Fi, SSID/password length, signal strength, and captive portal fallback.

FAQ

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Setup & pairing

Set up Terrestream

Start with USB-C power. The included wall adapter is the simplest path, and a computer USB port is OK if it provides enough power. Follow the on-screen welcome flow, pair the sensor in the app, connect Wi-Fi, then place it in open room air away from vents, windows, and cooking bursts.

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Pair with app

Open the app pairing flow, choose the Terrestream nearby, and enter the 6-digit passkey shown on the sensor. If the passkey does not match or the claim expires, restart pairing from the device and app.

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Wi-Fi & network

Wi-Fi won’t connect

Use a 2.4 GHz network, confirm the password, keep the SSID at 32 characters or fewer, and keep the password at 63 characters or fewer. If app setup keeps failing, use the device captive portal from your phone.

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Use captive portal

If the device has no saved Wi-Fi, join the temporary Terrestream-XXXX setup network from your phone, then open 192.168.4.1 and enter your Wi-Fi details. The setup network times out after 10 minutes of idle time.

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Device behavior

Tuesday fan sound

That sound is normally the scheduled SEN66 fan self-clean. It is expected to run around 10 AM local time on Tuesdays, lasts about 13 seconds, and may show a cleaning animation. If the sound is constant or repeats often, contact support.

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Quiet hours

Use Quiet Hours to set a start and end time for calmer overnight behavior. Brightness, LED level, and volume are also adjustable from the device and app.

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Use touchscreen

Use the menu control on the screen for About, Setup, Settings, Update, Privacy, and regulatory information. Tapping the reading area moves between the main air-quality views.

Firmware updates

Terrestream checks weekly for signed firmware updates during an overnight maintenance window. You can also start a manual update from device settings when one is available.

Factory reset

Use the reset option in device settings. Factory reset clears saved network, claim, and account-linking information, so you will need to pair and configure the sensor again.

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Before resale

Before selling, gifting, or recycling a Terrestream, factory reset the device. Factory reset clears the saved network, claim, and account-linking information so the next owner can pair it cleanly.

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App & dashboard

App and dashboard

The Terrestream app and dashboard are designed for live readings, history, notifications, and device settings. The dashboard is the deeper view for reviewing room behavior over time.

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History and export

Use the app or dashboard to review recent history. Data export and longer-range workflows depend on the account features enabled for your plan.

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Accuracy & sensors

Measured signals

Terrestream measures particulate matter, CO2, VOC index, NOx index, temperature, humidity, pressure, and light so the app can explain what changed and why it may matter.

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Readings look wrong

Check placement first: keep the sensor in open room air, away from direct vents, windows, humidifiers, cooking bursts, and blocked airflow. If a reading stays unusual after conditions stabilize, contact support with the room, placement, and a screenshot.

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Integrations

Home Assistant / MQTT

Terrestream supports Home Assistant and MQTT workflows. Matter, Apple Home, Google Home, Alexa, and similar ecosystems should be treated as Home Assistant bridge paths, not direct Terrestream platform integrations.

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Matter via Home Assistant

Terrestream does not describe Matter, Apple Home, Google Home, or Alexa as direct platform integrations on this support page. Use Home Assistant as the bridge path for those ecosystems.

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Privacy & security

Data sent

Terrestream is built around privacy-first air data. For access, correction, export, deletion, or jurisdiction-specific requests, use the privacy self-service portal.

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Delete or export data

Yes. Submit an access, deletion, correction, or portability request through the privacy self-service portal and we will process it through the verified privacy workflow.

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Data resale

Terrestream does not sell personal air-quality data and does not sell or share personal information for cross-context behavioral advertising. For binding details about personal information, service providers, sharing, and privacy rights, use the published Privacy Policy and the privacy self-service portal.

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Orders & returns

Returns / warranty / RMA

For returns, warranty, or RMA help, contact support with your order ID and a short description of the issue. Current warranty and return terms should follow the website, orders flow, and legal pages.

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Shipping status

Use the order status page to look up shipment and order information. If something looks wrong, contact support with your order ID.

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Compare

Compare monitors

Use the comparison overview for a fair, cited summary of the main indoor-air monitors. The comparison is factual: sensor stack, local-friendly workflows, dashboard interpretation, radon support, portability, display, and app ecosystem vary by model.

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Need a person?

Open a support ticket Order status Privacy self-service