NEXA LMST-606 range problem

As a part of my home automation system, I have a NEXA LMST-606 magnetic switch on the front door. The NEXA LMST-606 is capable of sending "on" and "off" signals when the door is opened and/or closed. The problem is that it has a terrible range when used with the RFXCOM RFXtrx433E USB 433.92MHz Transceiver. With only two open, or closed, doors between the LMST-606 and the RFXCOM, the signal is blocked.

My solution was to place a piece of wire about 25 cm connected to the negative battery connector. No soldering. I just opened the battery drawer and pushed the wire in when closing it again. That's it. After this, I have had no issues with the transmitter range.

Source: http://board.homeseer.com/showthread.php?t=142782

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