Baud rate 115200 for the CH34x chip

By Costa, 12 March, 2025
Forums
Gurux.Serial

Hello! I apologize in advance for my English.

I’m starting a new project and plan to use your library for serial communication. However, the chip I need to use is the CH34x with a baud rate of 115200, and I couldn’t find support for this configuration. Will your library support this baud rate in the future?

Kurumi

1 year 1 month ago

Hi,

Baud rate 115200 is supported, but it was not shown on the Properties dialog.
That is now fixed to version 1.0.28.

BR,
Mikko

Costa

1 year 1 month ago

Thank you for the quick response and support, Kurumi!

In the future, we are considering developing something for Android to help our users. Does the gurux.serial.android library offer the same support?

Kurumi

1 year 1 month ago

Hi,

Android support depends on the chipset manufacturer.
You need to test that with your USB-to-serial port converter.

BR,
Mikko

Costa

1 year 1 month ago

Unfortunately, the Android library does not support the CH340 chip with a baud rate of 115200.

Costa

1 year ago

Hello, Kurumi.

I ran some tests, but the "Invalid baud rate value" error is still occurring. Looking at the code, it seems that the "setConfig" method, which is called when opening the port, is not configured to support this baud rate.

Kurumi

1 year ago

Hi,

I found only an optical probe that uses CH34x. The optical probe's max baud rate is 9600, so I was not able to test this CH34x with a baud rate of 115200.

Get the latest version from GitHub and let me know if you have problems.

The USB to serial port converter that uses CH34x chipset is ordered. There will be no new release before this is tested with CH34x.

BR,
Mikko

Costa

1 year ago

Hello, Kurumi. Sorry for the delayed response.

We ran several tests but were unsuccessful in establishing communication using the latest modification. So, we checked the code and, instead of calling the setConfig method, we called setBaudRate—and it worked! So far, we have a few basic read and write commands, as well as generic profile and register commands, and they have been working well for this baud rate.