Signal Strength

What is Signal Strength/RSSI?

The Received Signal Strength Indicator (RSSI) or Signal Strength is a measure of how strong the most recent signal was when it reached its destination. The RSSI value ranges from 0 to 255. Higher RSSI values indicate a stronger signal. Reliable communication can best be achieved with RSSI values greater than 70. If the RSSI is too low the wireless communications may become intermittent or fail entirely. Sometimes the RSSI value will have signal strength bars next to it. These bars are designed to give an easily understood indication of the relative signal strength based on the RSSI. Commissioners should take the RSSI indication into account when setting up and installing a system. The Control system will inform the user if the RSSI is too low for reliable communications and the installer should use one of the methods available to boost or increase the RSSI level

What should I do if the signal strength is too low?

Signal strength is affected by the distance between the devices and any objects that are directly between them. Metal and liquids can block the signal that wireless products use to communicate. The best ways to improve signal strength are to remove metallic objects from the path of the signal and move the devices closer together if possible. If the signal is still too low, repeaters or additional antennas can be used to extend the range of the network. For more information on extending the range of a wireless network please refer to the Repeaters and Signal Boosters and Wireless Accessories pages.