When a wireless network interface is started, it becomes an active interface that is not yet capable of transmitting and receiving data since no operational link to a network medium is configured. The first step to join a network to have an operational link is the scan operation which consists of finding the wireless networks available in the range of the wireless module.
A wireless network interface should be able to scan any time after the network interface has been successfully started. A successful call to NetIF_WiFi_Scan() returns the wireless networks available to join which can be joined by the wireless network interface. See NetIF_WiFi_Scan for more information.
You can scan for a wireless network by calling the NetIF_WiFi_Scan() API function with the necessary parameters. A call to NetIF_WiFi_Scan() is shown below.
There are very few things that could cause a network interface to not scan properly. The application developer should always inspect the return error code and take the appropriate action if an error occurs. Once the error is resolved, the application may again attempt to call NetIF_WiFi_Scan().