Serial is not working

[azrin1972]

Hi @avafinger

Been testing this for a couple of months. Everything seem fine except for serial port.

There’s no ttys1 and no ttyUSB if I insert the USB serial devise. Any plans to update this ?

[avafinger]

I will revise the DTB and see what i can do...

[azrin1972]

Thank you Azrin Aris

…

On Feb 19, 2020, at 23:50, avafinger ***@***.***> wrote:  I will revise the DTB and see what i can do... — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[avafinger]

Please copy m64.dtb_5.3.9-m64 to /boot
make sure dtb is linked to m64.dtb_5.3.9-m64

m64.dtb_5.3.9-m64.tar.gz

if not you do this in /boot
:

    sudo ln -sf m64.dtb_5.3.9-m64 dtb

[azrin1972]

still could not find /devt/tyS1 and /dev/ttyUSB*
dmesg shows that it found a prolific Technology USB controller

[avafinger]

uart1 is used by bluetooth. Can you post a complete dmesg? Maybe some kernel config is missing.

[azrin1972]

Here is the dmesg

dmesg.log

[avafinger]

What is the device you are attaching?
Are you able to use the BT keyboard?

[azrin1972]

tested and working:

1. BT keyboard
2. /dev/ttyS0
3. /dev/ttyS3

NOT Working:
USB serial - I cannot find /dev/ttyUSBx

[azrin1972]

What is the device you are attaching? HDMI monitor
Are you able to use the BT keyboard? YES

[avafinger]

/dev/ttyUSB? will come up when it finds the driver for your device, that is the reason i asked which device (USB serial device), like FTDI USB serial device.

Kernel config is missing the driver for your specific device, please provide which USB serial device you want to use.

[azrin1972]

I'm using prolific PL-2303 usb serial