Added curl dependency

README.md

@@ -2,3 +2,5 @@
 
 Simple shell script to turn predefined wled instances on/off or switch presets.
 
+Requires *curl* version 7.82.0 or newer.
+

wled

@@ -7,7 +7,7 @@
 # License: CC0
 
 print_usage() {
-    echo "Usage: $0 [f(nordcenter)|w(ohnzimmer)] [on|off|1-17 (preset number)|dump]"
+    echo "Usage: $0 [f(nordcenter)|w(ohnzimmer)] [on|off|1-17|list]"
 }
 
 if test $# -ne 2; then
@@ -41,6 +41,15 @@ case "$2" in
     [1-9]|[1-9][0-7])
         api_resp=$(curl -s -4 --json "{'on':true,'ps':$2}" "http://$wled_host/json")
     ;;
+    l|list)
+        echo "Presets on $wled_host:"
+        curl -s -4 "http://$wled_host/presets.json" | \
+            # Split into lines. One line per preset.
+            sed --sandbox -n 's/"\([0-9]\{1,2\}\)"/\n"\1"/gp' | \
+            # Extract number and name. Append final newline.
+            sed --sandbox -n 's/^"\([0-9]\{1,2\}\)":.*"n":"\([[:print:]]*\)".*$/\1: \2/p; a\'
+        exit $?
+    ;;
     dump)
         curl -s -4 -w '\n' "http://$wled_host/json"
         exit 0