def get_best_rssi_per_location(sensors):
    """Find the strongest signal in each location."""
    best_rssi = {}
    for sensor in sensors.values():
        location = sensor["location"]
        rssi = sensor["rssi"]
        if rssi and (location not in best_rssi or rssi > best_rssi[location]):
            best_rssi[location] = rssi
    return best_rssi