feat: consolidate LG TV bridge — cached IP discovery, robust WoL, systemd deploy
Rework the MQTT bridge into a single deployable unit: - Drop the self-SSH hop; run locally on steel141 (on the TV's LAN, has bscpylgtv, effectively always-on). - Cache last-known TV IP and probe it directly; /24 ping-sweep only on a cache miss. Stops the 30s HA state poll from flapping/spamming the net. - WoL now unicast (last-known IP) + broadcast, ports 9/7, 3 bursts. - systemd unit (User=seth, EnvironmentFile for MQTT_PASSWORD), install.sh, env template, .gitignore. Removes the half-finished lgtv.sh.new. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Mortdecai
@@ -0,0 +1,171 @@
|
||||
#!/bin/bash
|
||||
# LG TV control — runs locally on steel141 (192.168.0.141), on the TV's LAN.
|
||||
#
|
||||
# Design notes (see DECISIONS.md):
|
||||
# * No SSH hop. This box is already on the TV's subnet with bscpylgtv +
|
||||
# network broadcast, and is effectively always-on. The old version SSHed
|
||||
# to seth@192.168.0.141 from itself — pointless overhead + a failure mode.
|
||||
# * IP discovery is cached. We persist the last-known TV IP and probe it
|
||||
# directly (fast TCP). A full /24 ping-sweep only runs on a cache miss,
|
||||
# so the 30s HA state poll no longer hammers the network and no longer
|
||||
# flaps when ARP entries go stale.
|
||||
# * WoL is sent unicast (to last-known IP) AND broadcast, multiple ports,
|
||||
# several bursts — the robust-as-software-can-be wake path. If the TV
|
||||
# still won't wake, it's the TV's own settings (Quick Start+ / Mobile TV
|
||||
# On / wired Ethernet), which no script can fix.
|
||||
#
|
||||
# Usage: lgtv.sh [on|off|status]
|
||||
|
||||
set -euo pipefail
|
||||
|
||||
TV_MAC="f8:01:b4:2a:26:ed"
|
||||
BROADCAST="192.168.0.255"
|
||||
STATE_FILE="${LGTV_STATE:-${HOME}/.cache/lgtv/last_ip}"
|
||||
WEBOS_PORTS="3000 3001"
|
||||
|
||||
mkdir -p "$(dirname "$STATE_FILE")"
|
||||
|
||||
# Probe a single IP for an open WebOS port. Echo the IP and succeed if reachable.
|
||||
probe_ip() {
|
||||
local ip="$1"
|
||||
IP="$ip" PORTS="$WEBOS_PORTS" python3 - <<'PY'
|
||||
import os, socket, sys
|
||||
ip = os.environ['IP']
|
||||
for port in os.environ['PORTS'].split():
|
||||
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
||||
s.settimeout(1.2)
|
||||
try:
|
||||
s.connect((ip, int(port)))
|
||||
print(ip)
|
||||
sys.exit(0)
|
||||
except Exception:
|
||||
pass
|
||||
finally:
|
||||
s.close()
|
||||
sys.exit(1)
|
||||
PY
|
||||
}
|
||||
|
||||
# Find the TV's IP. Try the cache first (fast), fall back to an ARP sweep.
|
||||
find_tv_ip() {
|
||||
# 1. Cached IP — the common path, one quick TCP probe.
|
||||
if [[ -s "$STATE_FILE" ]]; then
|
||||
local cached
|
||||
cached="$(<"$STATE_FILE")"
|
||||
if [[ -n "$cached" ]] && probe_ip "$cached" >/dev/null 2>&1; then
|
||||
echo "$cached"
|
||||
return 0
|
||||
fi
|
||||
fi
|
||||
|
||||
# 2. Cache miss — sweep the /24 to repopulate ARP, match the TV's MAC,
|
||||
# confirm a WebOS port is open, then re-cache.
|
||||
local found
|
||||
found="$(TV_MAC="$TV_MAC" PORTS="$WEBOS_PORTS" python3 - <<'PY'
|
||||
import os, socket, subprocess
|
||||
mac = os.environ['TV_MAC'].lower()
|
||||
ports = os.environ['PORTS'].split()
|
||||
|
||||
subprocess.run(
|
||||
'for i in $(seq 1 254); do ping -c1 -W1 192.168.0.$i >/dev/null 2>&1 & done; wait',
|
||||
shell=True,
|
||||
)
|
||||
|
||||
neigh = subprocess.check_output('ip neigh show', shell=True, text=True)
|
||||
for line in neigh.splitlines():
|
||||
low = line.lower()
|
||||
if mac not in low or 'failed' in low or 'incomplete' in low:
|
||||
continue
|
||||
ip = line.split()[0]
|
||||
for port in ports:
|
||||
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
||||
s.settimeout(1.2)
|
||||
try:
|
||||
s.connect((ip, int(port)))
|
||||
print(ip)
|
||||
raise SystemExit(0)
|
||||
except Exception:
|
||||
pass
|
||||
finally:
|
||||
s.close()
|
||||
print('')
|
||||
PY
|
||||
)"
|
||||
|
||||
if [[ -n "$found" ]]; then
|
||||
echo "$found" > "$STATE_FILE"
|
||||
echo "$found"
|
||||
return 0
|
||||
fi
|
||||
return 1
|
||||
}
|
||||
|
||||
tv_on() {
|
||||
# Unicast to last-known IP (if we have one) + broadcast, ports 9 & 7,
|
||||
# three bursts. WoL is fire-and-forget; the TV has no IP to talk to yet.
|
||||
local target=""
|
||||
[[ -s "$STATE_FILE" ]] && target="$(<"$STATE_FILE")"
|
||||
|
||||
echo "Sending Wake-on-LAN to $TV_MAC (broadcast${target:+ + unicast $target})..."
|
||||
TV_MAC="$TV_MAC" BROADCAST="$BROADCAST" TARGET="$target" python3 - <<'PY'
|
||||
import os, socket, time
|
||||
mac = os.environ['TV_MAC']
|
||||
magic = b'\xff' * 6 + bytes.fromhex(mac.replace(':', '')) * 16
|
||||
dests = [os.environ['BROADCAST']]
|
||||
if os.environ.get('TARGET'):
|
||||
dests.append(os.environ['TARGET'])
|
||||
|
||||
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
||||
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
|
||||
for _ in range(3):
|
||||
for dest in dests:
|
||||
for port in (9, 7):
|
||||
try:
|
||||
s.sendto(magic, (dest, port))
|
||||
except OSError:
|
||||
pass
|
||||
time.sleep(0.4)
|
||||
s.close()
|
||||
print('WoL bursts sent')
|
||||
PY
|
||||
}
|
||||
|
||||
tv_off() {
|
||||
echo "Finding TV..."
|
||||
local ip
|
||||
if ! ip="$(find_tv_ip)"; then
|
||||
echo "ERROR: TV not found on network (already off?)"
|
||||
exit 1
|
||||
fi
|
||||
echo "TV at $ip — sending WebOS power_off..."
|
||||
TV_IP="$ip" python3 - <<'PY'
|
||||
import asyncio, os
|
||||
from bscpylgtv import WebOsClient
|
||||
|
||||
async def main():
|
||||
client = await WebOsClient.create(os.environ['TV_IP'])
|
||||
await client.connect()
|
||||
await client.power_off()
|
||||
await asyncio.sleep(1)
|
||||
await client.disconnect()
|
||||
|
||||
asyncio.run(main())
|
||||
print('power_off sent')
|
||||
PY
|
||||
echo "Done."
|
||||
}
|
||||
|
||||
tv_status() {
|
||||
if find_tv_ip >/dev/null 2>&1; then
|
||||
echo "TV: ON at $(<"$STATE_FILE")"
|
||||
else
|
||||
echo "TV: OFF (not found on network)"
|
||||
fi
|
||||
}
|
||||
|
||||
case "${1:-}" in
|
||||
on) tv_on ;;
|
||||
off) tv_off ;;
|
||||
status) tv_status ;;
|
||||
*) echo "Usage: $0 [on|off|status]"; exit 1 ;;
|
||||
esac
|
||||
Reference in New Issue
Block a user