Wi-Fi

  • wifi

When ESP32-C5 works as a STA and connects to a dual-band single-SSID router, will it prefer 2.4 GHz or 5 GHz?

When the RSSI values of 5 GHz and 2.4 GHz are the same, the system prefers 5 GHz by default. If the RSSI values differ, the system applies the rssi_5g_adjustment parameter, in dBm, as compensation. The module will switch to 2.4 GHz only when the actual 5 GHz signal strength is lower than the 2.4 GHz signal strength minus the rssi_5g_adjustment value.

Therefore, in the common dual-band single-SSID case where the signal strengths are treated as the same, ESP32-C5 will prefer 5 GHz.

Does ESP32-S3 require Wi-Fi calibration during production?

No. Espressif Wi-Fi chips have an internal auto-calibration mechanism. Self-calibration is performed during software initialization, so no Wi-Fi calibration is required during manufacturing.

How should the authentication mode be configured when ESP32 connects to Wi-Fi? Is AUTH OPEN compatible with all modes?

When connecting to Wi-Fi, the authentication mode should match the mode actually used by the router.

If the module is configured with WIFI_AUTH_OPEN, it can usually interoperate with most router authentication modes. However, there is one exception: starting from ESP-IDF v5.0, if you need to connect to a WEP/WPA network, authmode must be explicitly set to WIFI_AUTH_WEP or WIFI_AUTH_WPA_PSK.