read_write_parameters.py¶

from yamcs.client import YamcsClient


def print_cached_value():
    """Print a single value from server cache."""
    pval = processor.get_parameter_value("/YSS/SIMULATOR/BatteryVoltage1")
    print(pval)


def print_realtime_value():
    """Print a newly processed value."""
    pval = processor.get_parameter_value(
        "/YSS/SIMULATOR/BatteryVoltage2", from_cache=False, timeout=5
    )
    print(pval)


def print_current_values():
    """Print multiple parameters from server cache."""
    pvals = processor.get_parameter_values(
        ["/YSS/SIMULATOR/BatteryVoltage1", "/YSS/SIMULATOR/BatteryVoltage2"]
    )
    print("battery1", pvals[0])
    print("battery2", pvals[1])


def write_value():
    """Writes to a software parameter."""
    processor.set_parameter_value("/YSS/SIMULATOR/AllowCriticalTC1", True)


def write_values():
    """Writes multiple software parameters."""
    processor.set_parameter_values(
        {
            "/YSS/SIMULATOR/AllowCriticalTC1": False,
            "/YSS/SIMULATOR/AllowCriticalTC2": False,
        }
    )


if __name__ == "__main__":
    client = YamcsClient("localhost:8090")
    processor = client.get_processor(instance="simulator", processor="realtime")

    print("Fetch parameter value from cache")
    print_cached_value()

    print("\nFetch newly processed parameter value")
    print_realtime_value()

    print("\nFetch multiple parameters at the same time")
    print_current_values()

    print("\nWrite to a software parameter")
    write_value()

    print("\nWrite multiple software parameters at once")
    write_values()