Maximize power saving. Anytime you transmit or during a beacon interval (100ms) the chip will wake up. During the beacon interval, the AP will also notify the WiFi chip if there is any incoming data. So in max power saving, the TX side will be delayed because there is penalty to wake up the chip if it’s sleeping. This mode is useful when you expect to receive data frequently, but you don’t send data often.
WiFi.maxLowPowerMode();
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