Overview
Wi-Fi strength, measured in dBm (decibel milliwatts), indicates the power level of the signal received by your device from a Wi-Fi router or access point. dBm is a logarithmic unit used to express power relative to 1 milliwatt (mW). The closer the dBm value is to 0, the stronger the signal.
Strength Reading?
Here's a general guide to interpreting Wi-Fi strength in terms of dBm:
-30 dBm to -50 dBm: Excellent signal strength. Your device is very close to the router, and you should experience fast and reliable connections.
-51 dBm to -60 dBm: Good signal strength. Your device is close to the router, and you should experience good performance.
-61 dBm to -70 dBm: Fair signal strength. Your device is within range of the router, but performance may be affected, especially if there are obstacles or interference.
-71 dBm to -90 dBm: Weak signal strength. Your device is at the edge of the Wi-Fi coverage area, and connections may be slow or unreliable.
-Below -90 dBm: Very weak signal strength. Your device may struggle to maintain a connection, and performance will likely be poor.
Where to see the data?
On the product you're connected to wifi on, go to the following menu:
Menu>Other/Device Settings>Internet>Wifi>Wifi Information>RSSI
Conclusion
It's important to note that signal strength can vary due to factors such as distance from the router, obstructions, interference from other devices, and the quality of the router itself. Additionally, different devices may display Wi-Fi strength differently, so while one device might show a certain dBm value, another might show it differently.