public async Task TestInt32() { var factory = new ModbusFactory(); IModbusMaster modbus = factory.CreateMaster(_client); await _client.ConnectAsync(MODBUS_IP, MODBUS_PORT); int?data = await modbus.ReadInt32Async(MODBUS_SLAVE, 0); Assert.NotNull(data); await modbus.WriteInt32Async(MODBUS_SLAVE, 0, -2000); data = await modbus.ReadInt32Async(MODBUS_SLAVE, 0); Assert.NotNull(data); Assert.Equal(-2000, data); await modbus.WriteInt32Async(MODBUS_SLAVE, 0, 0); data = await modbus.ReadInt32Async(MODBUS_SLAVE, 0); Assert.NotNull(data); Assert.Equal(0, data); data = await modbus.ReadOnlyInt32Async(MODBUS_SLAVE, 0); Assert.NotNull(data); }