public async Task TestBytes()
{
var factory = new ModbusFactory();
IModbusMaster modbus = factory.CreateMaster(_client);
await _client.ConnectAsync(MODBUS_IP, MODBUS_PORT);
byte[] data = await modbus.ReadBytesAsync(MODBUS_SLAVE, 0, 5);
Assert.Equal(5, data.Length);
await modbus.WriteBytesAsync(MODBUS_SLAVE, 0, new byte[] { 1, 2, 3, 4, 5 });
data = await modbus.ReadBytesAsync(MODBUS_SLAVE, 0, 5);
Assert.Equal(5, data.Length);
Assert.Equal(new byte[] { 1, 2, 3, 4, 5 }, data);
await modbus.WriteBytesAsync(MODBUS_SLAVE, 0, new byte[] { 0, 0, 0, 0, 0 });
data = await modbus.ReadBytesAsync(MODBUS_SLAVE, 0, 5);
Assert.Equal(5, data.Length);
Assert.Equal(new byte[] { 0, 0, 0, 0, 0 }, data);
data = await modbus.ReadOnlyBytesAsync(MODBUS_SLAVE, 0, 5);
Assert.Equal(5, data.Length);
}