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sensors and experience intermittent communication between sensor
package and console, try turning off these other devices for
troubleshooting purposes. You may need to relocate the transmitters
or receivers to avoid the interference and establish reliable
communication. The frequencies used by the sensors are one of
(depending on your location): 433, 868, or 915 MHz (915 MHz for
United States).
Line of Sight Rating.
This device is rated at 300 feet or 100 meter
line of sight (under ideal circumstances; no interference, barriers or
walls), but in most real-world scenarios, including a wall or two, you
will be able to go about 100 feet or 30 meter.
Metal Barriers.
Radio frequency will not pass through metal barriers
such as aluminum siding or metal wall framing. If you have such
metal barriers and experience communication problems, you must
change the placement of sensor package and or console.
The following table shows different transmission media and expected
signal strength reductions. Each “wall” or obstruction decreases the
transmission range by the factor shown below.
Medium
RF Signal Strength Reduction
Glass (untreated)
5-15%
Plastics
10-15%
Wood
10-40%
Brick
10-40%
Concrete
40-80%
Metal
90-100%
Table 3: RF Signal Strength reduction
