Supported devices

Arduino, ESP32, etc	Microcontroller (serial/telnet)
Aim TTi QL series II	Power supply
Bronkhorst EL-FLOW	Mass flow controller
Julabo circulator	Recirculating bath
Keysight 3497xA	Digital multimeter
Keysight N8700	Power supply
Novanta IMS MDrive	Stepper motor controller
OptLaser TEC RS232	Thermoelectric cooler controller
Parker Compax3	Servo controller
Picotech PT104	Temperature logger
PolyScience PD	Recirculating bath
ThermoFisher ThermoFlex	Chiller
Xylem Hydrovar HVL	Variable speed pump controller

Highlights

• Class SerialDevice() offering higher-level general I/O methods for a serial device, such as auto_connect(), write() and query().

• Class Arduino() which wraps around SerialDevice(). In combination with DvG_StreamCommand it allows for automatically connecting to your Arduino(-like) device and for easy serial I/O communication.

• Class TelnetServerDevice() offering higher-level general I/O methods for e.g. an ESP32 microcontroller.

• Separate PyQt/PySide interfaces are provided for each of these devices, offering out-of-the-box multithreaded data acquisition and communication. It relies on DvG_QDeviceIO.

• Ready-to-run PyQt/PySide demos to directly control many of the supported devices with a graphical user-interface.

Examples

• SerialDevice

  from dvg_devices.BaseDevice import SerialDevice
  
  dev = SerialDevice()
  dev.connect_at_port(port="COM3")
  success, reply = dev.query("My query command")

• TelnetServerDevice

  from dvg_devices.BaseDevice import TelnetServerDevice
  
  dev = TelnetServerDevice()
  dev.connect(host="10.10.100.2", port=23)
  success, reply = dev.query("My query command")

1.7.3 (2026-08-28)

• OptLaser TEC controller: Fixed error “fixedWidth is an unknown keyword parameter” in OptLaser_TEC_controller_qdev.py.

1.7.2 (2026-08-27)

• OptLaser TEC controller: Minor changes on the demos.

1.7.1 (2026-08-17)

• OptLaser TEC controller: Fixed broken link to OptLaser manual.

• OptLaser TEC controller: Notify user of “Connection lost”.

1.7.0 (2026-08-17)

• Added support for OptLaser thermoelectric cooler (TEC) controller TEC-8A-24V-PID-HC-RS232.

1.6.0 (2026-05-13)

• Added class BaseDevice.TelnetServerDevice, useful for e.g. communicating with an ESP32 microcontroller over telnet.

1.5.2 (2025-11-10)

• Fixed communication error in Bronkhorst_MFC_protocol_RS232.py where the send setpoint value was incorrectly decoded into lower case hex, instead of higher case hex. Fixed.

1.5.1 (2025-01-21)

• Device Keysight_3497xA: Made hard-coded VISA_TIMEOUT an input argument instead

1.5.0 (2024-06-27)

• Support for Numpy 2.0

• Restore support for Python 3.6. Was removed by mistake. Version 1.4.0 and this version do support Python 3.6 actually, but only in combination with PyQt5. PySide2 will not work because the wrapper library qtpy still expects app.exec_() instead of app.exec(). That got fixed in the qtpy version for Python >= 3.7.

1.4.0 (2024-05-23)

Major clean-up and streamlining:

• Using qtpy library instead of my own Qt5/6 mechanism

• Changed all string formatting to f-strings

• Extended type hinting and checking

• Made demos uniform and passing qdev arguments to MainWindow now

• Individual source files now follow the PyPi package version

• Resolved nearly all Pylint / Pylance warnings

• Removed Python 3.6 support

New devices added:

• Xylem Hydrovar HVL - Variable speed pump controller

• Novanta IMS MDrive - Stepper motor controller

1.3.0 (2023-02-23)

• Added method BaseDevice.SerialDevice.query_bytes()

• Fixed type hints in BaseDevice.SerialDevice

1.2.0 (2022-09-14)

• Added support for PyQt5, PyQt6, PySide2 and PySide6

1.1.0 (2022-02-01)

• Added method BaseDevice.SerialDevice.readline()

1.0.0 (2021-07-02)

• Stable release, identical to v0.2.6

0.2.6 (2021-03-02)

• Minor: Adjusted width of GUI control in Julabo_circulator_qdev.py

0.2.5 (2021-03-02)

• Loosened dependence to pyserial~= 3.4

0.2.4 (2021-03-02)

• Added device: Julabo circulator

0.2.3 (2020-08-27)

• Workaround for bug with unknown cause in Aim_TTi_PSU_protocol_RS232 where the power supply occasionally will skew the serial input and output stream, such that the reply matches the second-previous query statement. Fixed by forcefully flushing the serial input and output buffers whenever a wrong reply is received. Hopefully, this will fix the skew when the next query() operation gets executed.

0.2.2 (2020-08-27)

• Fixed bug in BaseDevice.query_ascii(). The use of ast.literal_eval got removed because it chokes on nan. Everything is now interpreted as a float instead.

0.2.1 (2020-08-12)

• Fix wrong import statement dvg-pyqt-controls

• Fix wrong import statement dvg-pyqt-filelogger

0.2.0 (2020-08-11)

• Added dependence dvg-pyqt-controls~=1.0

• Added dependence dvg-pyqt-filelogger~=1.0

• Added dependence dvg-pyqtgraph-threadsafe~=3.0

0.1.0 (2020-07-23)

• Fixed bug in BaseDevice.py where inspect.getouterframes() would momentarily suspend the thread. Solved by ditching inspect. The new ID_validation_query mechanism now relies on a simple boolean flag that gets set to force query() to raise on timeout.

• Update dependence dvg-qdeviceio==0.3.0

0.0.7 (2020-07-17)

• Update dependence dvg-qdeviceio==0.2.2

0.0.6 (2020-07-16)

• Finished implementing BaseDevice.SerialDevice()

• Update dependence dvg-qdeviceio==0.2.1

0.0.5 (2020-07-07)

• Update dependence dvg-qdeviceio==0.2.0 Enum DAQ_trigger is now called DAQ_TRIGGER

• Code style: Black

0.0.4 (2020-07-04)

• Update dependence dvg-qdeviceio==0.1.2

0.0.3 (2020-07-02)

• Fixed broken packaging

0.0.2 (2020-07-02)

• Major restructuring PyPI package

• Implemented DvG_QDeviceIO

0.0.1 (2020-07-01)

• First release on PyPI