Add input protection scripts

scripts/_input_protection_disable.py

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+import json
+from its_preselector.controlbyweb_web_relay import ControlByWebWebRelay
+from its_preselector.web_relay_preselector import WebRelayPreselector
+
+sensor_definition_file = "/opt/scos-sensor/configs/sensor_definition.json"
+preselector_json_file = "/opt/scos-sensor/configs/preselector_config.json"
+spu_relay_json_file = "/opt/scos-sensor/configs/switches/x410_config.json"
+
+# Load Preselector
+with open(sensor_definition_file, "r") as f:
+    sensor_definition_json = json.load(f)
+with open(preselector_json_file, "r") as f:
+    preselector_json = json.load(f)
+preselector = WebRelayPreselector(sensor_definition_json, preselector_json)
+
+# Load SPU Relay
+with open(spu_relay_json_file, "r") as f:
+    spu_json = json.load(f)
+spu_relay = ControlByWebWebRelay(spu_json)
+
+# Enable Preselector Power
+spu_relay.set_state("power_on_preselector")
+
+# Set Preselector to Antenna State
+preselector.set_state("antenna")

scripts/_input_protection_enable.py

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+import json
+from its_preselector.controlbyweb_web_relay import ControlByWebWebRelay
+from its_preselector.web_relay_preselector import WebRelayPreselector
+
+sensor_definition_file = "/opt/scos-sensor/configs/sensor_definition.json"
+preselector_json_file = "/opt/scos-sensor/configs/preselector_config.json"
+spu_relay_json_file = "/opt/scos-sensor/configs/switches/x410_config.json"
+
+# Load Preselector
+with open(sensor_definition_file, "r") as f:
+    sensor_definition_json = json.load(f)
+with open(preselector_json_file, "r") as f:
+    preselector_json = json.load(f)
+preselector = WebRelayPreselector(sensor_definition_json, preselector_json)
+
+# Load SPU Relay
+with open(spu_relay_json_file, "r") as f:
+    spu_json = json.load(f)
+spu_relay = ControlByWebWebRelay(spu_json)
+
+# Set Preselector to Noise Diode Off State
+preselector.set_state("noise_diode_off")
+
+# Disable Preselector Power
+spu_relay.set_state("power_off_preselector")

scripts/input_protection.sh

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+#!/bin/bash
+
+# Usage:
+#   - Activate a Python environment with the its_preselector
+#   package installed
+#   - Run this script with start and stop times for input
+#   protection specified as command line arguments.
+
+# Example: Enable input protection from 10:00 to 12:00
+# > sudo bash
+# > cd /opt/scos-sensor
+# > venv/bin/activate
+# > pip install git+https://github.com/NTIA/Preselector
+# > bash scripts/input_protection.sh 10:00 12:00
+
+# This script sets the preselector state to "noise_diode_off"
+# then powers off the preselector, at START_TIME
+# Then, at STOP_TIME, the preselector is powered on and set to
+# the "antenna" state.
+
+
+START_TIME=$1
+STOP_TIME=$2
+
+SCRIPT_DIR=$(dirname "$0")
+
+echo "python3 $SCRIPT_DIR/_input_protection_enable.py" | at $START_TIME
+
+echo "python3 $SCRIPT_DIR/_input_protection_disable.py" | at $STOP_TIME