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When i am trying to connect to my CM4 via serial on my linux desktop and i am unable to get any output from screen i have ensured that enable_uart=1 is in my config.txt file

for clarafaction i am talking about a usb to uart cable like this

output of sudo screen /dev/ttyUSB0 115200 the uart pins are connected to gpio pins 14 and 15, i am expecting shell output, not a blank screen and the usb end is connected to my desktop any help would be appreciated

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  • Could you clarify (by editing your question)? Serial over USB emulates a serial link over the USB bus. The enable_uart line enables a serial link using the UART on GPIO 14/15.
    – joan
    Jan 13 at 19:33
  • done, hopefully that helps Jan 13 at 19:37
  • enable_uart is meaningless unless you have connected a serial link to GPIO 14/15. Please say what each end of the USB to serial dongle is connected to. It's not clear what is sending/receiving data and what you expect to see.
    – joan
    Jan 13 at 19:46
  • the uart pins are connected to gpio pins 14 and 15, i am expecting shell output, not a blank screen and the usb end is connected to my desktop Jan 13 at 19:49
  • Remember to add clarifications to your question. You still have not said why you expect output. What is happening at both ends of the link.
    – joan
    Jan 13 at 19:58

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