Install through the app
YoLink devices are added and configured exclusively through the YoLink mobile app.
YoLink multi-RTU installations
Install once.
Evaluate with confidence.
A practical field guide for deploying YoLink sensors consistently, preserving device identity, and collecting dependable HVAC performance data.
Sensor ready
Typical signal−25 to −85 dB
Free-air rangeUp to 1,000 ft
1account per building
QRcode backup required
4serial characters in every name
DATminimum evaluation point
01 · Deployment fundamentals
Start with a resilient installation.
YoLink is intentionally simple in the field, but device recovery and useful data depend on disciplined setup.
Design for resilient coverage
Signals travel through ductwork, block walls, and floors. Hubs may overlap, and devices automatically seek the strongest available hub.
Use Wi-Fi or Ethernet
Connect each hub to building Wi-Fi for the simplest installation, or use a wired Ethernet connection.
Preserve every QR code
A device removed from an account can only be re-added with its QR code. Keep a backup photograph for every device.
Photograph the label before mounting
02 · Device identity
The QR code is the recovery key.
YoLink depends on the device QR image to add—or later re-add—a device. Without the image, reconfiguration is not possible.
- 1
Capture the full label
Take and retain a clear phone photograph of the QR code and serial number.
- 2
Name with location + serial suffix
Include the location and last four hexadecimal serial characters—for example,
Room 401 - EB01. - 3
Keep the suffix after relocation
Update the location name, but continue to retain the final four serial characters.
0 ≠ OHexadecimal serial numbers do not use the letter “O.” Always enter the number zero.
03 · Sensor setup
Quiet the alerts. Preserve the data.
Configure the app for monitoring without creating unnecessary email traffic or compromising factory calibration.
Recommended alert settings
Use the full measurement range.
Set temperature and humidity limits to their minimum and maximum values, then leave Alert Interval disabled.
Expect deliberate updates
The built-in reporting algorithm prioritizes battery life. Press the sensor’s update button when an immediate reading is necessary.
Avoid unnecessary recalibration
Recalibrate only against a valid reference. Calibration can be completed remotely through the correct building account.
Check battery status in Home Assistant
Remaining battery life is not shown in the YoLink app; use Home Assistant for that status.
Reference: sensor update thresholds
Reporting frequency varies with the size of the temperature or humidity change. Use the physical update button for immediate commissioning checks.
04 · Evaluation coverage
Match sensor depth to the question.
Begin with dependable supply-air temperature. Add return-air and mixed-air measurements when the evaluation needs greater diagnostic confidence.
MinimumDAT
Supply-air performance
A single sensor mounted inside the supply diffuser core provides a reasonable RTU performance evaluation.
BetterDAT + RAT
Improved system accuracy
Add return-air or representative space temperature to better distinguish unit performance from changing space load.
BestDAT + RAT + MAT
Complete airside view
Add mixed-air temperature when roof access is available to evaluate outside-air and economizer behavior.
Roof access is generally only required for MAT sensors and second-stage control relays. Second-stage relays may support demand management and utility demand-response strategies.
05 · Field best practices
Leave the site ready for analysis.
Consistent documentation is part of the sensor installation. Complete the record while equipment, room details, and thermostat information are in front of you.
Open the original installation presentationField completion checklist9 checks
- Install YoLink hubs in advance.
- Use the Ambient-created YoLink account—one account per building.
- Use Ambient installation forms and log every sensor.
- Take enough photographs to make each installation unambiguous.
- Mount the DAT sensor inside the room supply diffuser core.
- Mount RAT sensors on a return-air grille, or use a representative thermostat.
- Photograph each RTU thermostat and record non-YoLink make and model.
- Follow the Ambient naming convention in the YoLink app.
- Use neodymium magnetic tape, Velcro, or double-backed tape for mounting.