Attributes: speed, ignition, satellites, altitude, battery_voltage, fuel_level, temperature, door_open
Operators: > < == != >= <= and or not in
List of dicts — use a list comprehension to query any field across all items:
 • my_list != null — list is present and non-empty
 • 42 in [r["field"] for r in my_list] — any item has field equal to 42
Bluetooth beacons — beacon_ids is a list of objects with fields id, type, rssi, battery, temp. IDs are formatted as "uuid:major:minor" (iBeacon) or "namespace:instance" (Eddystone):
 • "abc123:0:1" in [b["id"] for b in beacon_ids] — beacon in range