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LHT65 Temperature & Humidity sensor      18  /  56 
 
2.4.9  Ext=5, E5 Illumination Sensor 
 
 
Means: The device is set to connect to an Illumination sensor, the cable connection is fine. 
This strength of illumination is 401 lux 
 
 
 
Means: The device is set to connect to an Illumination sensor, the cable connection is losing.