81 lines
2.6 KiB
Bash
Executable File
81 lines
2.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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# ~/bin/sdr-heat-scanner - Wireless M-Bus & Heat Meter SDR Telemetry Collector
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# Listens on 868.95 MHz (Mode C&T) and 868.3 MHz (Mode S) using RTL-SDR / rtl_433.
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# Part of The Observatoř environmental telemetry suite.
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set -euo pipefail
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DATA_DIR="$HOME/src/observator/data"
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LOG_FILE="$DATA_DIR/heat_meters.jsonl"
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SHM_FILE="/dev/shm/latest_heat_meter.json"
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PID_FILE="/tmp/sdr-heat-scanner.pid"
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mkdir -p "$DATA_DIR"
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cmd="${1:-scan}"
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case "$cmd" in
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start)
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if [ -f "$PID_FILE" ] && kill -0 "$(cat "$PID_FILE")" 2>/dev/null; then
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echo "[sdr-heat] Scanner already running (PID: $(cat "$PID_FILE"))."
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exit 0
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fi
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echo "[sdr-heat] Starting RTL-SDR heat meter scanner daemon (868.95 MHz Mode C&T)..."
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# Run rtl_433 in background appending JSON lines
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nohup rtl_433 -f 868.95M -s 1200k -R 104 -F json >> "$LOG_FILE" 2>/tmp/sdr-heat.err &
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SCAN_PID=$!
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echo "$SCAN_PID" > "$PID_FILE"
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echo "[sdr-heat] Scanner started with PID $SCAN_PID, logging to $LOG_FILE"
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;;
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stop)
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if [ -f "$PID_FILE" ]; then
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PID=$(cat "$PID_FILE")
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if kill -0 "$PID" 2>/dev/null; then
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kill "$PID" 2>/dev/null || true
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echo "[sdr-heat] Stopped scanner daemon (PID: $PID)."
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fi
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rm -f "$PID_FILE"
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else
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pkill -f "rtl_433 -f 868.95M" 2>/dev/null || true
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echo "[sdr-heat] Stopped all rtl_433 instances."
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fi
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;;
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status)
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if [ -f "$PID_FILE" ] && kill -0 "$(cat "$PID_FILE")" 2>/dev/null; then
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echo "[sdr-heat] Scanner DAEMON ACTIVE (PID: $(cat "$PID_FILE"))"
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else
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echo "[sdr-heat] Scanner DAEMON INACTIVE"
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fi
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if [ -f "$LOG_FILE" ]; then
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TOTAL_PACKETS=$(wc -l < "$LOG_FILE")
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echo "[sdr-heat] Total captured packets: $TOTAL_PACKETS"
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echo "[sdr-heat] Unique meter IDs detected:"
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grep -oP '"id":\s*\K[0-9]+' "$LOG_FILE" | sort -u | head -n 10 || echo "None yet"
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else
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echo "[sdr-heat] Log file $LOG_FILE not yet created."
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fi
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;;
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view|tail)
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if [ -f "$LOG_FILE" ]; then
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tail -f "$LOG_FILE"
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else
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echo "[sdr-heat] No packets logged yet in $LOG_FILE."
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fi
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;;
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scan|live)
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echo "[sdr-heat] Starting live foreground scan on 868.95 MHz (Ctrl+C to stop)..."
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exec rtl_433 -f 868.95M -s 1200k -R 104
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;;
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*)
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echo "Usage: sdr-heat-scanner <start|stop|status|scan|view>"
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exit 1
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;;
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esac
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