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Driver for CH341 USB/RS232 adapter

balanga

Daemon

Thanks: 62
Messages: 2,000

#1
Do I need a driver to enable usage of a CH341 USB/RS232 adapter?

lsusb tells me the VID/PID is 1a86:7523 - an HL-340 USB-Serial adapter.
 

balanga

Daemon

Thanks: 62
Messages: 2,000

#3
I do see the msg
Code:
uchom0 on uhub1
when the adapter is inserted so I guess support for it is there, so in theory it should work, but how do I actually test it?

I thought I'd dig out my old USR Courier HST modem to see if any lights on it could be flashed using minicom....but it has some strange power connector which I couldn't find. Maybe I'll try using my old LapLink cable if I can find it...

How else can I see if it's actually working?
 

sko

Well-Known Member

Thanks: 156
Messages: 334

#4
How else can I see if it's actually working?
You can do a serial loopback test by connecting the RXD and TXD pins of the RS232 connector (IIRC pin 2 and 3, but please double-check beforehand).
If you then connect to the serial port (usually /dev/ttyU0) with e.g. cu(1) (or minicom, screen, ...) you should be able to see everything you type as it is sent and immediately received.
 
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