• http://www.fhemwiki.de/wiki/Universalsensor
• http://forum.fhem.de/index.php/topic,20620.0.html

#Changelog#

##Version 0.15 (Development)##

• Improve / Fix debugging.
• Fix #16 so peering with HM-CC-RT-DN should stable now.
• Add hysteresis for battery voltage measurement.
• Experimental support for US-100 ultrasonic distance sensor (Do not use this experimental feature if you need the peering with HM-CC-RT-DN at this time)

##Version 0.14##

• Fix millis() overflow bug. Now, the sensor stays in sleep mode after 49 days, so battery should not drained anymore
• Battery voltage now measured with 1 digit only.

##Version 0.13 (Beta)##

• Add new register:
  • transmitTryMax: How often should the sensor try to send data without ack.
  • lowBatLimit: Defined the battery voltage used for low battery detection.
  • ledMode: Switch the device LED on or off while sent out data.
  • altitude: Define the sensor-altitude for calculating the air pressure at sea level.