3 years ago
#141 Quote
The Dri-Eaz dehumidifier sensors have 3 modes of operation:
1 - Standby Mode - When there is no AC power present the sensor enters standby mode.  While in standby mode the sensor will send a reading once every 5 minutes.  In this mode the sensors is operating from the internal battery power source and it will therefor include the battery voltage as part of the standby status message.  Other data values including temperature and RH will be 0 as these are not available in standby mode.  If you never see your dehu enter standby mode good chance the batteries need to be replaced.  Standby mode is also useful as a "asset tag" since it works from the internal battery.  Place a gateway near your warehouse and you'll know how many dehus, and which dehus, are in your warehouse.

2 - AC Present and Dehu OFF - When AC power is present and the dehu is switched OFF the sensor sends messages when commanded by the dehu controller.  As in standby mode tempreature and RH will be reported as 0 but unlike standby mode the battery voltage will also be 0 as it is not running from the batteries when AC power is present so it can not report an accurate battery voltage.

3 - AC Present and Dehu ON - When AC power is present and the dehu is switched ON the sensor sends messages when commanded by the dehu controller.  The messages will include T and RH as well as other dehu status messages.   The battery voltage will be reported as 0 as it is not running from the batteries when AC power is present so it can not report an accurate battery voltage.
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