fast_scan
Overview
This example demonstrates how to use Wi-Fi to quickly scan the functional connection AP.
It supports fast scan and full channel scan.
Fast scan: In this mode, the scan ends as soon as a matching AP is detected, even if the channel is not fully scanned. You can set a threshold for signal strength and select the desired authentication mode provided by the AP. The Wi-Fi driver will ignore aps that do not meet the above criteria.Full channel scan: Only end when the scan is complete. The ranking method of aps includes signal strength and authentication mode. After scanning, the Wi-Fi driver selects the most suitable AP.
After scanning, Wi-Fi will try to connect. In most cases, the AP with the best signal strength is connected.
Requirements
A properly connected AP is required.
Configure WiFi SSID and WiFi Password in menuconfig .
Building and flashing
Example Location： examples/wifi/fast_scan
compile, burn, and more, see: get started
Running result
Successfully running will output the following logs
D/main [0.002] boot reason 0
D/main [0.004] heap size 270856(264.51KB)
D/fls [0.010] flash size 0x200000(2MB)
D/ptb [0.014] partition table base 0x800e000
D/ft [0.020] ft_0 base 8000000, ft_1 base 8001000
D/ft [0.026] ft init too
D/ft [0.030] ft init error
E/nvs [0.034] use new hash entry num=53
I/fast scan [2.248] fast_scan finished.
D/wifi [7.218] distribution event 1
D/wifi [7.222] sta connected 42-C1-82-80-2A-15 channel 6 authmode 3
I/fast scan [8.046] got ip: 192.168.3.102
D/wifi [8.050] distribution event 0
D/wifi [8.056] sta got ip 192.168.3.102