User's Manual
Receiver model: WH2642
Sensor model: WH22B
Version 1.0 Page 15
Wireless communication is susceptible to interference, distance, walls and metal barriers. We
recommend the following best practices for trouble free wireless communication.
1. Electro-Magnetic Interference (EMI). Keep the ObserverIP receiver several feet away from
computer monitors and TVs.
2. Radio Frequency Interference (RFI). If you have other 433 MHz devices and
communication is intermittent, try turning off these other devices for troubleshooting
purposes. You may need to relocate the transmitters or receivers to avoid intermittent
communication.
3. Line of Sight Rating. This device is rated at 300 feet line of sight (no interference, barriers or
walls) but typically you will get 100 feet maximum under most real-world installations,
which include passing through barriers or walls.
4. Metal Barriers. Radio frequency will not pass through metal barriers such as aluminum
siding. If you have metal siding, align the remote and ObserverIP receiver through a window
to get a clear line of sight.
The following is a table of reception loss vs. the transmission medium. 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%
3.8 ObserverIP Receiver
3.8.1 Hardware Requirements
1. Broadband router
2. An “always-on” connection to the Internet. A high speed DSL or cable internet connection
that maintains constant connection to the internet.
3.8.2 Software Requirements
An IP scan tool is required to locate the ObserverIP on the network.
3.8.3 ObserverIP Connections
Connect the ObserverIP receiver power jack to AC power with the power adapter (included), as shown
in Figure 14, reference 10.
Connect the OberverIP receiver to your router using the Ethernet cable (included), as shown in Figure
14, reference 8.
Place the indoor and outdoor transmitters about 5 to 10 feet from the ObserverIP receiver and wait
several minutes for the remote sensors to synchronize with the receiver. Once synchronized, the
Indoor blue LED (Figure 13, reference 2) and Outdoor blue LED (Figure 13, reference 3) will be
illuminated.
All of the lights will turn on except the server light (until you connect to Weather Underground)>