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Serial screen for Raspberry Pi 3

Posted: Wed Jan 03, 2018 4:59 pm
by Vairetz
Hi everyone, I have a seral screen with connector for UART pins and I'd like to use it with my pi, I'd like to display Raspbian desktop on it.
How can I do? I try to connect it to GPIO and it starts but I don't know how to set RX and TX pins. I'd like to display my desktop on it when I don't have HDMI connected to my pi. It's possible?

Re: Serial screen for Raspberry Pi 3

Posted: Thu Jan 04, 2018 11:40 pm
by drgeoff
I suspect that your "serial screen" accepts only ASCII characters. If so you will only have a command line console, not the full desktop GUI.

Abd what type of interface does the screen have? If it is true RS232 or 5 volt TTL levels, you cannot connect it directly to the RPi GPIO serial port as that uses 3.3 volt levels and you risk fatally damaging the RPI.

Re: Serial screen for Raspberry Pi 3

Posted: Sun Jan 07, 2018 2:34 pm
by Vairetz
I have this screen: https://m.it.aliexpress.com/s/item/3283 ... &#autostay
I don't know if it's support all GUI interface..

Re: Serial screen for Raspberry Pi 3

Posted: Sun Jan 07, 2018 10:37 pm
by drgeoff
http://www.spotpear.com/download/LCD/ua ... on-EN.docx

Technically possible but will require a custom software driver. Also it appears to have a 5 volt signal interface cf the 3.3 volt levels of the RPi.

The resolution is only 176 by 220 which is not very useful for a desktop interface.

My advice would be to forget this screen and use one of the more common ones that has proper RPi support.

Re: Serial screen for Raspberry Pi 3

Posted: Sun Jan 14, 2018 11:15 am
by Vairetz
I'd like test it out of curiosity, I will try the command that you send me thank you very much!!