Note: This heatmap is available only in the Pro and Enterprise editions.
Using a secondary WiFi router is a smart way of managing your wireless coverage, extending it, having a backup network in case the primary coverage is temporarily down, etc.
The heatmap visualizing your secondary signal level provides you with an insight on how evenly it spreads throughout your space, and whether any adjustments are required to cover the poorly connected areas.
The troubleshooting secondary signal heatmap is a three color scheme of vibrant colors representing different signal level values. You can customize the color scheme of your heatmap in NetSpot settings, but the default colors represent the following: red – weak signal (less than -70 dBm); yellow – moderate (satisfactory) signal (between -70 and -40 dBm); green – great signal (above -40 dBm).
Strategies for increasing signal strength
Based on the values you have got on the heatmap you can decide what measures to take to improve the quality of coverage. You might want to move the APs around, or change their settings, or maybe add an AP to your setup.
Optimizing the AP placement
Make sure that the APs are installed in such a way that their signal overlaps slightly. All zones where you expect the switch from one AP to another, the secondary signal level should not drop below -70 dBm.
Regulating the transmit power
You can lower the transmit power of the main AP in order to ensure a more even load and favorable conditions for handover. At the same time make sure that transmit power is sufficient for a stable connection.
Activating mechanisms for smart roaming
Enabling the support for the following protocols can enhance the quality of switching between APs.
- 802.11k (improves roaming performance by allowing APs and clients to exchange information about the radio environment).
- 802.11v (helps make more informed roaming decisions, leading to faster transitions between APs),
- 802.11r (allows a quicker transition between APs).
It is also recommended to set the lowest RSSI level at which the transition will be initiated.
How to test the results
Once the adjustments have been applied, try moving around the area with the device with NetSpot on it and check the stability of connection in various points. Use the Inspector mode to check the signal level in real time.
Important note on computer firmware
Make sure the newest versions of AP and WiFi adapter driver firmware are installed on all computers that will be connecting to the WiFi network. These updates are important because they may contain roaming and signal strength management improvements.