CH340 RTS/DTR

By vladoam , 24 December, 2025
Forums
Gurux.Serial

Hi, I'm trying to read meter with usb2rs485 converter (https://github.com/WeActStudio/WeActStudio.USB2RS485V2/tree/master) it uses ch340 chipset (https://github.com/WeActStudio/WeActStudio.USB2RS485V2/blob/master/Doc/…). If I understand correctly my problem is that gurux serial android for ch340 does implement RTS/DTR? In windows everything works with gurux director and CH341SER driver. But on android no led is blinking on TX when my app try to connect to meter. Is there any solution for this? Thanks

Kurumi

5 months 1 week ago

Hi,

Update to version 3.0.5. We don't have a USB2RS485V2, so we were unable to test with it. However, it was tested with two other converters that use CH34x chipsets.

BR,
Mikko

vladoam

5 months 1 week ago

Thanks for the fix. I used another library (felhr85 UsbSerial for Android) because it has support for RTS/DTR and I wanted to test my converter with Gurux. Now that you added CH340x RTS/DTR in Gurux serial, I will use it once I finish other things. Thanks again, and happy new year.