Interpreting Wifi and Bluetooth Data - matthewkwan/waterbuddy GitHub Wiki

Wifi and Bluetooth information are relatively straightforward. They both utilize the RSSI provided by the system to determine the strength of signal.

An RSSI is expressed in dBm, a value between 0 and -100. Larger number = better signal strength.

Below is information from online source:

Acceptable Signal Strengths

Signal Strength

• -30 dBm Amazing: Max achievable signal strength. The client can only be a few feet from the AP to achieve this. Not typical or desirable in the real world.
• -67 dBm Very Good: Minimum signal strength for applications that require very reliable, timely delivery of data packets. VoIP/VoWiFi, streaming video.
• -70 dBm Okay: Minimum signal strength for reliable packet delivery. Email, web.
• -80 dBm Not Good: Minimum signal strength for basic connectivity. Packet delivery may be unreliable.
• -90 dBm Unusable: Approaching or drowning in the noise floor. Any functionality is highly unlikely.