In an IEEE 802.11 system, RSSI is the relative received signal strength in a wireless environment, in arbitrary units. It can also be sampled by an internal analog-to-digital converter (ADC) and the resulting values made available directly or via peripheral or internal processor bus. In zero-IF systems, it is derived in the baseband signal chain, before the baseband amplifier. RSSI is often derived in the intermediate frequency (IF) stage before the IF amplifier.

However, because signal strength can vary greatly and affect functionality in wireless networking, IEEE 802.11 devices often make the measurement available to users. RSSI is usually invisible to a user of a receiving device. In telecommunications, received signal strength indicator or received signal strength indication ( RSSI) is a measurement of the power present in a received radio signal.

Also shown: signal bars of 2 cellular networks, and signal bars of a Wi-Fi network. Note This method has been removed from versions of impOS running on the impC001.Signal strength of -74dBm (or 66 asu) displayed on a smartphone. If the WiFi is not active at all, or during an outage, the result will be zero. Remember, the value can change even if both the imp and the WiFi access point or router are not moved and remain at constant range. There are many more signal strength levels above -67 - values of up to -11 have been reported - but that’s not important: anything above -67 is good enough for everything the imp needs to do. To convert the value to ‘bars’ of signal strength as seen on phones, tablets and laptops, one mapping might be: RSSI The figure returned is the raw value reported by the WiFi hardware. the closer to zero), the greater the signal strength. The current strength of the WiFi signal in dBm is negative, and the higher the number (ie. The recommended means of gaining the information this method returns is to call ().

However, removing it altogether would cause users’ existing code to stop working, so we currently have no plans to do so.

Rssi 67