Waveshare 1.5" OLED screen Raspberry Pi config

50-fbtft.conf

# FBTFT xorg config file
# Assumes you don't have an HDMI screen connected (which would usually be /dev/fb0)

Section "ServerLayout"
    Identifier "TFT"
    Option "BlankTime" "10"
    Screen 0 "ScreenTFT"
EndSection

Section "Screen"
    Identifier "ScreenTFT"
    Monitor "MonitorTFT"
    Device "DeviceTFT"
    DefaultDepth 16
    SubSection "Display"
        Depth 16
        Modes "128x128"
    EndSubSection
Endsection

Section "Monitor"
    Identifier "MonitorTFT"
Endsection

Section "Device"
    Identifier "DeviceTFT"
    Driver "fbdev"
    Option "fbdev" "/dev/fb0"
EndSection

README.md

Requires adding user to tty group:

sudo usermod -a -G tty USERNAME

config.txt

[all]
# Waveshare 1.5" OLED screen
# Using wiring from https://www.waveshare.com/wiki/1.5inch_RGB_OLED_Module#Hardware_connection
dtoverlay=fbtft,spi0-0,ssd1351
dtparam=dc_pin=25
dtparam=reset_pin=27
dtparam=width=128
dtparam=height=128
dtparam=fps=25
dtparam=rotate=0
dtparam=speed=4500000
dtparam=bgr=on

fbi-setup.sh

sudo apt install fbi
sudo setcap 'cap_sys_tty_config+ep' $(which fbi)