paperlike-go

paperlike-go is a Go library and CLI tool to control a Dasung Paperlike HD* (2019) screen.

Installation instructions:

git clone https://github.com/leoluk/paperlike-go && cd paperlike-go
go build github.com/leoluk/paperlike-go/cmd/paperlike-cli

sudo install -m 0755 paperlike-cli /usr/local/bin/paperlike-cli

Your local user must be able to write to the monitor's i2c bus. First, figure out the right bus using third-party ddcutil tool (likely packaged by your distro):

ddcutil detect --verbose

Create a udev rule which grants your user's group write permissions to i2c devices:

echo "SUBSYSTEM==\"i2c-dev\", GROUP=\"your-group-here\", MODE=\"0660\"" | sudo tee /etc/udev/rules.d/50-i2c.rules
sudo udevadm trigger

Usage:

Usage of paperlike-cli:
  -clear
        Clear screen
  -contrast int
        Set contrast (1-9)
  -i2c string
        i2c device path (see ddcutil detect --verbose)
  -light1 int
        Set light1 intensity (0-85) (default -1)
  -light2 int
        Set light2 intensity (0-85) (default -1)
  -mode int
        Set dithering mode (1-4 for M1-M4)
  -speed int
        Set drawing speed (1-5)

Drawing speeds:

1	Fast++
2	Fast+
3	Fast
4	Black+
5	Black++

Example i3 config:

bindsym $mod+Mod1+1 exec paperlike-cli -i2c /dev/i2c-0 -contrast 1
bindsym $mod+Mod1+2 exec paperlike-cli -i2c /dev/i2c-0 -contrast 2
bindsym $mod+Mod1+3 exec paperlike-cli -i2c /dev/i2c-0 -contrast 3
bindsym $mod+Mod1+4 exec paperlike-cli -i2c /dev/i2c-0 -contrast 4
bindsym $mod+Mod1+5 exec paperlike-cli -i2c /dev/i2c-0 -contrast 5
bindsym $mod+Mod1+6 exec paperlike-cli -i2c /dev/i2c-0 -contrast 6
bindsym $mod+Mod1+7 exec paperlike-cli -i2c /dev/i2c-0 -contrast 7
bindsym $mod+Mod1+8 exec paperlike-cli -i2c /dev/i2c-0 -contrast 8
bindsym $mod+Mod1+9 exec paperlike-cli -i2c /dev/i2c-0 -contrast 9
bindsym $mod+Mod1+h exec paperlike-cli -i2c /dev/i2c-0 -mode 1
bindsym $mod+Mod1+j exec paperlike-cli -i2c /dev/i2c-0 -mode 2
bindsym $mod+Mod1+k exec paperlike-cli -i2c /dev/i2c-0 -mode 3
bindsym $mod+Mod1+l exec paperlike-cli -i2c /dev/i2c-0 -mode 4
bindsym $mod+Mod1+z exec paperlike-cli -i2c /dev/i2c-0 -speed 1
bindsym $mod+Mod1+u exec paperlike-cli -i2c /dev/i2c-0 -speed 2
bindsym $mod+Mod1+i exec paperlike-cli -i2c /dev/i2c-0 -speed 3
bindsym $mod+Mod1+o exec paperlike-cli -i2c /dev/i2c-0 -speed 4
bindsym $mod+Mod1+p exec paperlike-cli -i2c /dev/i2c-0 -speed 5
bindsym $mod+Mod1+Return exec paperlike-cli -i2c /dev/i2c-0 -clear