/// <summary>
/// Reads a string value from the KWLEC200.
/// </summary>
/// <param name="modbus">The Modbus master device.</param>
/// <param name="slave">The slave ID of the Modbus device.</param>
/// <param name="name">The Helios value name attribute.</param>
/// <param name="size">The Helios value size attribute.</param>
/// <param name="count">The Helios value count attribute.</param>
/// <returns>The string value read from the KWLEC200.</returns>
public (string Data, DataStatus Status) ReadRawData(IModbusMaster modbus, byte slave, string name, ushort size, ushort count)
{
string text = string.Empty;
try
{
lock (_lock)
{
_logger?.LogDebug($"ReadRawData write '{name}'.");
modbus.WriteStringAsync(slave, OFFSET, name + "\0\0").Wait();
Task.Delay(TimeSpan.FromMilliseconds(200)).Wait();
text = modbus.ReadStringAsync(slave, OFFSET, (ushort)(count * 2)).Result;
_logger?.LogDebug($"ReadRawData read: '{text}'.");
}
if (!string.IsNullOrEmpty(text))
{
return(text, Good);
}
else
{
_logger?.LogError($"ReadRawData invalid response.");
return(string.Empty, BadUnknownResponse);
}
}
catch (Exception ex)
{
_logger?.LogError(ex, $"Exception in ReadRawData.");
return(string.Empty, BadUnknownResponse);
}
}
public async Task TestString()
{
var factory = new ModbusFactory();
IModbusMaster modbus = factory.CreateMaster(_client);
await _client.ConnectAsync(MODBUS_IP, MODBUS_PORT);
await modbus.WriteStringAsync(MODBUS_SLAVE, 0, "Hello");
string text = await modbus.ReadStringAsync(MODBUS_SLAVE, 0, 5);
Assert.Equal(5, text.Length);
Assert.Equal("Hello", text);
text = await modbus.ReadOnlyStringAsync(MODBUS_SLAVE, 0, 5);
}