101 lines
2.8 KiB
Bash
Executable file
101 lines
2.8 KiB
Bash
Executable file
#!/bin/sh
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#
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# Simpel command line tool to turn predefined wled instances on/off or switch
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# presets.
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#
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# Author: Shy
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# License: CC0
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print_usage() {
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echo "Usage: $0 f(nordcenter)|w(ohnzimmer) on|off|1-17|list"
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echo " $0 f(nordcenter)|w(ohnzimmer) b(rightness) 1-255"
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}
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curl_cmd() {
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curl --silent --show-error --fail --ipv4 --max-filesize 32K "$@"
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}
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# Parse host argument.
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case "$1" in
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""|-h|--h) # Missing host parameter.
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print_usage
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exit 0
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;;
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f|fnordcenter)
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wled_host='wled-fnordcenter.local'
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;;
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w|wohnzimmer)
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wled_host='wled-wohnzimmer.local'
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;;
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*) # Unknown host parameter.
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echo "Error: unknown host \"$1\"." >&2
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print_usage
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exit 1
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;;
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esac
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# Parse and execute command argument.
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case "$2" in
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on) # Switch on.
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api_resp=$(curl_cmd --json '{"on":true}' "http://$wled_host/json")
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;;
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off) # Switch off.
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api_resp=$(curl_cmd --json '{"on":false}' "http://$wled_host/json")
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;;
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b|brightness) # Set brightness.
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if test -z "$3"; then
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echo "Error: missing parameter for brightness." >&2
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exit 1
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fi
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# Try to convert 3rd parameter to an integer between 1 an 255.
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bright=$(printf '%u' "$3" 2>/dev/null)
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if test $? -gt 0; then # Conversion failed.
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echo "Error: unable to parse parameter for brightness." >&2
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exit 1
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elif test "$bright" -lt 1 -o "$bright" -gt 255; then
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echo "Error: parameter for brightness is out of range." >&2
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exit 1
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fi
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api_resp=$(curl_cmd --json "{'bri':$bright}" "http://$wled_host/json")
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;;
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[1-9]|1[0-7]) # Switch to preset.
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api_resp=$(curl_cmd --json "{'ps':$2}" "http://$wled_host/json")
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;;
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l|list) # List presets.
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echo "Presets on $wled_host:"
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curl_cmd "http://$wled_host/presets.json" | \
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# Split into lines - one line per preset. Append final newline.
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sed --sandbox 's/"\(1\?[0-9]\)"/\n"\1"/g; $a\ ' | \
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# Extract number and name of every preset.
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sed --sandbox -n 's/^"\(1\?[0-9]\)":.*"n":"\([[:print:]]*\)".*$/\1: \2/p'
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exit $?
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;;
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dump) # Dump JSON response from API.
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curl_cmd -w '\n' "http://$wled_host/json"
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exit 0
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;;
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"") # Missing command.
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echo "Error: missing command." >&2
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print_usage
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exit 1
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;;
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*) # Unknown command.
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echo "Error: unknown command \"$2\"." >&2
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print_usage
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exit 1
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;;
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esac
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# Check curl exit status
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curl_exit=$?
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if test $curl_exit -ne 0; then
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echo "Error: curl exited with exit code $curl_exit." >&2
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exit 1
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fi
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# Check API responce.
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if test "$api_resp" != '{"success":true}'; then
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echo "Error: unexpected responce from WLED API." >&2
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exit 1
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fi
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