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4.1.3 Upgrade Firmware
After adding a sensor to the system for the first time, the app will check the sensor's firmware version. If
the firmware is not the latest one, the app will ask the user to upgrade the sensor’s firmware before
performing any other operations. After the first use, users can check new firmware version in the device
page of the App, as shown in Sec. 4.2.
When upgrading the firmware, if the status of the sensor in the App is “Upgrading…” for a long time,
please press the screen and pull down to reload the page and refresh the status, because sometimes the
App is not able to refresh by itself. Also, during downloading the new firmware, the LED of the sensor
will blink blue. Usually the downloading will take less than 5 minutes. Sometimes due to network issues,
the download could be stuck, and the LED could blink blue for more than 15 minutes. In this case, it is
safe to unplug the power of the sensor and re-plug. If the download was complete, the sensor will
upgrade to the new version after restarting. Otherwise the download will continue automatically and
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