这个功能需要拿手操器来测试
第一，设置$USBCDC/Enable=Off ， 设置你现在的esp32为主机（你可以理解为一台电脑）
第二，下载https://webinstaller.esp3d.io/这个固件在手操器上方便操作
第三，手操器里面选择setting，选择通信模式为serial，再回到setting，选择setting editor，选择 swap RX TX 为 disable
第四，setting 里面的 baud rate 设置为 115200
这样就可以通信上了
3.1 Test Secondary USB
Advanced Tests · Optional · Test the secondary USB connection with a pendant / hand controller
ℹ️
Objective: This section tests the secondary USB communication function. A pendant / hand controller is required for this test.
⚠️
NOTE: This is an optional advanced test. If you do not use a pendant / hand controller, you can skip this section.
1
Set the Controller USB Mode
- Open the FluidNC WebUI command line.
- Enter command:
$USBCDC/Enable=Off
- This sets the ESP32 side to host mode for this test. You can understand it as making the ESP32 work like a small computer.
- Restart the controller if required.
2
Install ESP3D Firmware on the Pendant
- Connect the pendant / hand controller to your computer.
- Open the ESP3D Web Installer: https://webinstaller.esp3d.io/
- Install the ESP3D firmware on the pendant.
- Restart the pendant after installation.
3
Set Pendant Communication
- On the pendant, open Settings.
- Set communication mode to Serial.
- Go back to Settings, then open Setting Editor.
- Set Swap RX TX to Disable.
- Set baud rate to 115200.
- Connect the pendant to the controller secondary USB port.
- Wait a few seconds for the connection to initialize.
- If the settings are correct, the pendant should communicate with the controller normally.
- The controller accepts
$USBCDC/Enable=Off.
- The pendant is running ESP3D firmware.
- Communication mode is set to Serial.
- Swap RX TX is set to Disable.
- Baud rate is set to 115200.
- The pendant can communicate with the controller through the secondary USB port.