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in my case, after confirming wifi works well with getting started guide from expressif: https://docs.espressif.com/projects/esp-idf/en/latest/get-started/, the problem solved after using esp32 in Arduino IDE from development repository instead of board manager (probably thankfully to enabled by default CONFIG_REDUCE_PHY_TX_POWER) - https://github.com/espressif/arduino-esp32/tree/1.0.0