diff --git a/.gitignore b/.gitignore
index c948f71..5fe8653 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
 bin/*
 lib/*
 .
+
+# vi backup files
+*~
diff --git a/contrib/completion/g810-led-completion.bash b/contrib/completion/g810-led-completion.bash
new file mode 100644
index 0000000..07d80ac
--- /dev/null
+++ b/contrib/completion/g810-led-completion.bash
@@ -0,0 +1,111 @@
+#/usr/bin/env bash
+
+# OPTIONS
+# #######
+g810_device_options="-dv -dp -ds -tuk"
+g810_tuk_option="-tuk"
+g810_tuk_options="1 2 3"  # yet not used
+g810_options="$g810_device_options g810_tuk_option"
+
+# COMMANDS
+# ########
+
+# effects
+effects_command="-fx"
+effects="color breathing cycle waves hwave vwave cwave"
+effects_target="all keys logo"
+
+# startup mode
+startup_mode_command="--startup-mode"
+startup_modes="wave color"
+
+# keygroup commands
+key_group_commands="-g -gn"
+key_groups="logo indicators fkeys gkeys modifiers multimedia arrows numeric functions keys"
+
+# g810 commands and options
+simple_long_commands="--list-keyboards --print-device --help --help-keys --help-effects --help-samples"
+
+#   ALL
+# ########
+all="-a -k -an -kn -c $startup_mode_command $simple_long_commands $g810_options $key_group_commands"
+
+
+
+_g810-led_completions()
+{
+    # ignore already typed in g810 options
+    # TODO check for parameter, and avoid duplicated options
+    # ######################################################
+    local i=1
+    while [[ $g810_options =~ ${COMP_WORDS[i]} &&  ${COMP_CWORD} -gt $i ]]
+    do
+	((i++))
+    done
+    
+    # check for simple long commands, that dont have parameters
+    # #########################################################
+    local contains=0
+    local exactmatch=0
+    local opt
+    for opt in $simple_long_commands
+    do
+	if [[ $opt =~ "${COMP_WORDS[i]}" ]]; then let contains=contains+1;     fi
+	if [[ $opt == "${COMP_WORDS[i]}" ]]; then let exactmatch=exactmatch+1; fi
+    done
+    if [[ $contains -eq 1 && $exactmatch -eq 1 ]]; then return; fi;
+
+    # --> startup mode
+    if [[ $startup_mode_command == "${COMP_WORDS[i]}" ]]
+    then
+	((i++))
+	if [[ " $startup_modes " =~ " ${COMP_WORDS[i]} " ]]
+	then
+	    return;
+	else
+	    COMPREPLY=($(compgen -W "$startup_modes" --  ${COMP_WORDS[i]}))
+	    return
+	fi
+    fi
+
+    # --> effects
+    if [[ $effects_command == "${COMP_WORDS[i]}" ]]
+    then
+	((i++))
+	if [[ " $effects " =~ " ${COMP_WORDS[i]} " ]]
+	then
+	    ((i++))
+	    if [[ " $effects_target " =~  " ${COMP_WORDS[i]} " ]]
+	    then
+		return
+	    else
+		COMPREPLY=($(compgen -W "$string" -- "${COMP_WORDS[i]}" ))
+		return
+	    fi
+	else
+	    COMPREPLY=($(compgen -W "$effects" -- "${COMP_WORDS[i]}" ))
+	    return
+	fi	
+    fi
+
+    # commands with keygroups
+    if [[ " $key_group_commands " =~ " ${COMP_WORDS[i]} " ]]
+    then
+	((i++))
+	if [[ " $key_groups " =~ " ${COMP_WORDS[i]} " ]]
+	then
+	    return
+	else
+	    COMPREPLY=($(compgen -W "$key_groups" --  ${COMP_WORDS[i]}))
+	    return
+	fi
+    fi
+    
+    
+    # complete
+    # ########
+    COMPREPLY=($(compgen -W "$all" -- ${COMP_WORDS[i]}))
+    return
+}  
+
+complete -F _g810-led_completions g810-led