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Fix bug which prevents Lakeshore blocking_t from exiting #7796

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Fix bug which prevents Lakeshore blocking_t from exiting #7796

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718d530
Use get_latest instead of direct parameter call to get setpoint
Jan 21, 2026
d9691a2
Update newsfragment for PR 7796
Jan 21, 2026
65d54e2
Use time delay instead of get_latest to ensure correct setpoint returned
Jan 21, 2026
ee7e6f8
Use post_delay on setpoint instead of extra parameter.
Jan 22, 2026
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2 changes: 2 additions & 0 deletions docs/changes/newsfragments/7796.improved_driver
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Fixed bug in Lakeshore driver that was causing blocking_t
to periodically hang indefinitely.
1 change: 1 addition & 0 deletions src/qcodes/instrument_drivers/Lakeshore/lakeshore_base.py
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Expand Up @@ -236,6 +236,7 @@ def __init__(
get_parser=float,
set_cmd=f"SETP {output_index}, {{}}",
get_cmd=f"SETP? {output_index}",
post_delay=0.5, # getting setpoint too soon after getting may fetch previous setpoint
)
"""
The value of the setpoint in the preferred units of the control loop sensor
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