Wi-Fi Adaptivity Test

[中文]

The Wi-Fi Adaptivity Test evaluates a device’s ability to make real-time adjustments to parameters, such as transmission rate, channel selection, and power levels, by simulating varying network conditions and loads. This test aims to optimize the overall network performance and stability.

Note

If the power spectral density (PSD) of the Wi-Fi signal is higher than 10 dBm/MHz, the adaptivity test should choose the Listen Before Talk (LBT) mechanism based on non-hopping load.

Set Up Test Environment

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UART Connection Description

The Device Under Test (DUT) is a product designed based on Espressif chips or modules. The DUT is connected to the USB-to-UART adapter board via UART.

Note

  • The CHIP_EN pin of the DUT is pulled up by default. If it is not pulled up in the product design, you need to manually connect the CHIP_EN to the 3V3 pin.

  • Some serial communication boards have already swapped RXD and TXD internally, so there is no need to reverse them. The wiring should be adjusted according to the actual situation.

  • Espressif chips have a power-on self-calibration function, so the RF connection line must be connected to the test instrument before the DUT is powered on for testing.

Flash Firmware

  1. Open DownloadTool.

  2. Set ChipType, Com Port, Baud Rate, click Open, select to download to Flash.

  3. Flash ESP32 Wi-Fi Adaptivity Test/Blocking Test Firmware to 0x1000 via UART.

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Flashing Firmware

After the flashing is completed, continue with the following steps for the adaptivity test.

Start Testing

Note

Set BaudRate to 115200.

Check Power-on log

Use a serial communication tool, such as SerialPortUtility, and configure the port number and the baud rate. If the device under test prints similar information as below after being powered on again, you can confirm that the test status is OK:

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Device Power-on Serial Port Print Log

Next, you can choose to test using serial port commands or test using EspRFTestTool tool.

Test Using Serial Port Commands

Enter the following commands in the serial port in sequence for network configuration and traffic testing:

//Device provisioning
//Configure the prototype to enter station mode
op -S -o 1

//Connect to AP, SSID is CMW-AP, password is 12345678
sta -C -s CMW-AP -p 12345678

//Traffic test
//Clear socket
soc -T

//Create UDP, port is 8080, default socket ID is 54
soc -B -t UDP -p 8080

//Perform traffic test on AP device with socket ID 54
soc -S -s 54 -i 192.168.1.1 -p 8080 -l 2000 -n 200000000 -j 1

Note

The -p parameter is used to set the AP password. If the AP has no password, this parameter is not needed.

If the following similar information is printed in the serial port, it indicates that the traffic has been started and the Wi-Fi Adaptivity Test can be initiated.

../../_images/wifi_adptive_log.png

Serial Port Log for Device Provisioning

Test Using EspRFTestTool Tool

  • Open the EspRFTestTool toolkit, configure ChipType, COM, and BaudRate, open the port, and select the WiFi Adaptivity test interface.

  • In STA mode, enter AP ssid and AP pwd, and click Connect AP to connect.

  • After successful connection, the following log should be printed:

../../_images/wifi_adptive_connection.png

Device Network Provisioning

  • After a successful connection, set Packet Num to a sufficiently large value—such as 20000000—to ensure the traffic can run for a long duration.

  • Set Server PORT to 8080, Socket ID to 54, and change Packet Delay to 1 to meet certification requirements.

  • After the above settings are completed, click Send Data. If the log is similar to the figure below, it indicates that the traffic has been started, and the Wi-Fi Adaptivity Test can be initiated.

../../_images/wifi_adptive_senddata.png

Wi-Fi Adaptivity Traffic Test