YoLink Indoor Hygrometer Thermometer — LoRa Long-Range Sensor, 2-Year Cloud + Local Storage, Battery-Powered

The YoLink Indoor Hygrometer Thermometer is a battery-powered LoRa sensor that continuously logs accurate temperature and humidity for up to two years of cloud history and local storage, delivering push, email, and SMS alerts via the YoLink Hub.

Designed for locations where WiFi struggles, this compact sensor uses long-range LoRa radio to report precise readings from hard-to-reach spots like basements, garages, safes, or greenhouses. With Sensirion Swiss sensors factory-calibrated to strict standards and the ability to store over 64,000 events locally, it preserves environmental history even during temporary internet outages. When online, the YoLink app displays trends, exports data, and sends customizable notifications to keep you informed.

How does the YoLink sensor keep a complete record when the internet drops?

Built-in local memory captures readings at set intervals (as often as every 15 minutes), so short-term network interruptions won’t erase your history. When the sensor regains connection to the YoLink Hub, stored events upload automatically to the cloud for continuous recordkeeping.

• Stores over 64,000 events locally
• Records at user-configurable intervals down to 15 minutes
• Automatic upload when internet connectivity returns

How accurate and reliable are temperature and humidity readings?

This device uses Sensirion digital sensors, factory-calibrated to high standards for repeatable results. Typical accuracy is ±0.2°C (±0.36°F) for temperature and ±2% RH for humidity, making it suitable for home, nursery, storage, and greenhouse monitoring where precise conditions matter.

• Swiss-made Sensirion sensors, factory-calibrated
• Typical accuracy: ±0.2°C and ±2% RH
• No manual calibration required for everyday use

What notification and integration options can I use?

Set temperature and humidity thresholds in the YoLink app to receive push notifications, email, or SMS alerts. Apple Critical Alerts are supported for urgent messages, and the device integrates with IFTTT; Alexa voice queries can report the temperature value (humidity unsupported by Alexa at this time).

• Push, email, and up to 10 free SMS alerts per month (one hub/device)
• Apple Critical Alerts override silent mode for urgent updates
• IFTTT triggers available; Alexa can report temperature on request

How long will the batteries last, and what maintenance is required?

Powered by two AA batteries, the sensor is engineered for multi-year operation under typical settings—up to about five years depending on usage and environment. The YoLink app notifies you of low battery status so you can replace cells before monitoring is affected.

• Runs on two AA batteries for extended life
• Real-time low-battery alerts via the YoLink app
• Minimal maintenance: periodic battery replacement only

Who is this for: The YoLink Indoor Hygrometer Thermometer is ideal for users who need dependable environmental monitoring where WiFi is unreliable — homeowners tracking basements or nurseries, small-business operators protecting inventory, gardeners managing greenhouse conditions, and anyone who wants long-term data with exportable records. Note that a YoLink Hub is required to use cloud features, app notifications, and integrations.