Merge branch 'bugfix/tw26890_update_wifi_api_guide' into 'master'
Bugfix/tw26890 update wifi api guide See merge request idf/esp-idf!3630
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# Iperf Example
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## Note about 80Mhz flash frequency
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The iperf can get better throughput if the SPI flash frequency is set to 80Mhz, but the system may crash in 80Mhz mode for ESP-WROVER-KIT V3.
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Removing R140~R145 from the board can fix this issue. Currently the default SPI frequency is set to 40Mhz, if you want to change the SPI flash
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frequency to 80Mhz, please make sure R140~R145 are removed from ESP-WROVER-KIT V3 or use ESP32 DevKitC.
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## Note about iperf version
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The iperf example doesn't support all features in standard iperf. It's compitable with iperf version 2.x.
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## Note about 80MHz flash frequency
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The iperf can get better throughput if the SPI flash frequency is set to 80MHz, but the system may crash in 80MHz mode for ESP-WROVER-KIT.
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Removing R140~R145 from the board can fix this issue. Currently the default SPI frequency is set to 40MHz, if you want to change the SPI flash
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frequency to 80MHz, please make sure R140~R145 are removed from ESP-WROVER-KIT or use ESP32 DevKitC.
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## Introduction
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This example implements the protocol used by the common performance measurement tool [iPerf](https://iperf.fr/).
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