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ellasmith
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ellasmith
Asked: September 13, 2023In:
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Hi, I’m working on a circuit based on AiThinker ESP32-C3-13/ 13U- Kit and communicating the ESP32 kit with my computer through GPIO18 and GPIO19. The problem is when I open the COM port on my. In the net operation, MCU resets ...Read more

Hi,

I’m working on a circuit based on AiThinker ESP32-C3-13/ 13U- Kit and communicating the ESP32 kit with my computer through GPIO18 and GPIO19. The problem is when I open the COM port on my. In the net operation, MCU resets and boots itself. So I did some research and found out that the RTS pin is connected to the ESP32-C3 EN pin so when I open the port by my. Net operation on my computer to the ESP32 kit through the COM port, MCU gets a reset signal and reboot.

To answer this problem I set properties as below;

 _serialPort.PortName = port; _serialPort.BaudRate = 115200; _serialPort.DtrEnable = true; _serialPort.RtsEnable = false; // Set the read/write timeouts _serialPort.ReadTimeout = 1000; _serialPort.WriteTimeout = 1000; try { _serialPort.Open(); message = _serialPort.ReadLine(); if (message == "HELLO\r") { // device connected  _serialPort.Close(); statusLabel.Text = "Cihaz bulundu"; return (port); } }
Even though I disable RTS, MCU still resets and boots itself. I tried all combinations for the DtrEnable and RtsEnable properties. But the result did not change.

Anybody can help me to answer this issue?

Thank you

Ella

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aithinkercomesp32gpio18gpio19mcuportserial
  1. Julian White

    Hello, You should set handshake after setting property RtsEnable = true. Use properties as below:- _serialPort.RtsEnable = true; _serialPort.Handshake = System.IO.Ports.Handshake.RequestToSend; _serialPort.RtsEnable = false; Thank You

    Hello,

    You should set handshake after setting property RtsEnable = true. Use properties as below:-

     _serialPort.RtsEnable = true;
_serialPort.Handshake = System.IO.Ports.Handshake.RequestToSend;
_serialPort.RtsEnable = false;

Thank You
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sachinsharma
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sachinsharma
Asked: July 1, 2023In:
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Hi everyone, Is it possible to use the USB port for both JTAG and Mass Storage Devices (or CDC)? This can either beIt enumerates as a composite device For the first 10 seconds of booting it’s JTAG, but also switches over to MSD ...Read more

Hi everyone,

Is it possible to use the USB port for both JTAG and Mass Storage Devices (or CDC)?

This can either be

  • It enumerates as a composite device
  • For the first 10 seconds of booting it’s JTAG, but also switches over to MSD if nothing has connected

I’m using the ESP32-S3-Mini and I am using every pin, so I can not use the external JTAG interface.

Thank You

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cdcesp32jtagportusb
  1. nidhi singh

    Hello, Yes, it is possible to use the USB port for both JTAG and Mass Storage Devices (or CDC) on the ESP32-S3-Mini. This can be achieved by configuring the USB device to appear as a composite device, which means that it can present itself to the host as multiple devices at the same time. The firstRead more

    Hello,

    Yes, it is possible to use the USB port for both JTAG and Mass Storage Devices (or CDC) on the ESP32-S3-Mini. This can be achieved by configuring the USB device to appear as a composite device, which means that it can present itself to the host as multiple devices at the same time.

    The first option is impossible, as USB-serial-JTAG (which provides the JTAG connection) and USB-OTG (which can provide the mass storage functionality) can’t be connected to the USB pins at the same time. The second option is viable.

    Thank You

    Nidhi Singh

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