esp_wifi_sta_get_ap_info doesn't update RSSI value (IDFGH-3704)

[dyarkovoy]

Environment

• Development Kit: [none]
• Module or chip used: [ESP32-WROOM-32D]
• IDF version (run git describe --tags to find it): 3.40001.200521 (4.0.1)
• Build System: [CMake]
• Compiler version (run xtensa-esp32-elf-gcc --version to find it): 2.80200.200226 (8.2.0)
• Operating System: [Windows]
• (Windows only) environment type: PlatformIO
• Using an IDE?: [Yes] PlatformIO
• Power Supply: [USB]

Problem Description

wifi_ap_record_t.rssi value obtained by calling esp_wifi_sta_get_ap_info() is valid only for the moment ESP32 associated with the AP, and doesn't update when signal strength changes (ESP32 moves away/closer to the AP). If this is intended behavior, docs don't seem to be mentioning it. ESP8266 behaves differently and returns up-to-date value of RSSI.

[liuzfesp]

Hi @dyarkovoy, is the AP hidden AP?

[dyarkovoy]

Hi, @liuzfesp , you are right, the AP is hidden and once I un-hide it, I get real-time RSSI readings.
So is it expected behavior for hidden APs?
Is there any other way to get real-time RSSI for hidden AP?

[HarveyRong-Esp]

Hi @dyarkovoy, This is bug, we will fix it soon, thanks for your feedback.

[Alvin1Zhang]

@dyarkovoy Thanks for reporting, we had a fix under internal reviewing. This issue will be closed automatically once the fix is available on GitHub. Thanks.