# \#instruments **URL:** https://forum.opentap.io/tag/instruments/5.md [Latest](https://forum.opentap.io/latest.md) · [Categories](https://forum.opentap.io/categories.md) · [Tags](https://forum.opentap.io/tags.md) --- ## [OpenTAP removes configuration items](https://forum.opentap.io/t/opentap-removes-configuration-items/2681)
**Author:** [@matthewdumas](https://forum.opentap.io/u/matthewdumas)\ **Replies:** 4\ **Last updated:** [June 17, 2026, 6:13pm UTC](https://forum.opentap.io/t/opentap-removes-configuration-items/2681 "2026-06-17T18:13:26Z")
Hello again, I am running into some cases where OpenTAP “helpfully” removes instruments from the configuration that it can’t find because they are disconnected or powered off. Is there a way to change this behavior to … --- ## [Best approach and methods for serial communication (Python)](https://forum.opentap.io/t/best-approach-and-methods-for-serial-communication-python/2033)
**Author:** [@jb111](https://forum.opentap.io/u/jb111)\ **Replies:** 2\ **Last updated:** [August 22, 2024, 12:46pm UTC](https://forum.opentap.io/t/best-approach-and-methods-for-serial-communication-python/2033 "2024-08-22T12:46:36Z")
Hi, I am currently trying to create a simple instrument which opens a Serial connection to a specific COM port and baudrate. I am currently attempting to open the connection using PySerial, but I suspect it is not the b… --- ## [How to add a SCPI Serial instrument](https://forum.opentap.io/t/how-to-add-a-scpi-serial-instrument/1316)
**Author:** [@jesse123](https://forum.opentap.io/u/jesse123)\ **Replies:** 3\ **Last updated:** [December 7, 2023, 5:46am UTC](https://forum.opentap.io/t/how-to-add-a-scpi-serial-instrument/1316 "2023-12-07T05:46:36Z")
Hello, I want to add a SCPI Serial instrument, because the default ScpiInstrument can’t set the baudrate and so on, but when i wait to add this SCPI Serial instrument, i can’t access the Visa class, so i don’t how to do… --- ## [Keysight E36200 series power supply - package](https://forum.opentap.io/t/keysight-e36200-series-power-supply-package/962)
**Author:** [@reelthymeos](https://forum.opentap.io/u/reelthymeos)\ **Replies:** 3\ **Last updated:** [December 15, 2022, 10:45am UTC](https://forum.opentap.io/t/keysight-e36200-series-power-supply-package/962 "2022-12-15T10:45:53Z")
Hello, On packages.opentap.io, when you search for a plugin for E36200 power supplies, it shows an entry for that driver but the actual repo is for 11713 Attenuator Switch Drivers(0.19\_11\_41v1) This looks like a mistak… --- ## [Where can i find the DMM teststep after plugin installation?](https://forum.opentap.io/t/where-can-i-find-the-dmm-teststep-after-plugin-installation/61)
**Author:** [@LXuser](https://forum.opentap.io/u/LXuser)\ **Replies:** 33\ **Last updated:** [October 26, 2020, 8:43am UTC](https://forum.opentap.io/t/where-can-i-find-the-dmm-teststep-after-plugin-installation/61 "2020-10-26T08:43:30Z")
Hello, i just installed the DMM plugin which says in the description that the “bundle includes Test steps” but when clicking in the testplan on “+” then i cannot find a DMM in the teststep list. What do i have to do t…