Version 0.16.5

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Bug Fixes

• Keysight E36xxx supplies reporting Enabled: OFF after enable — running lager supply <net> state (or any other read-only supply command) immediately after a successful lager supply <net> enable would report the output as OFF on Keysight E36200/E36300 series supplies. The KeysightE36000 driver constructor was unconditionally calling disable_output() as a “safe default” on every connect, so each fresh CLI invocation silently turned the output off before running its query. The disable is now gated behind the explicit reset=True flag, so constructing a driver for a read (or for enable) no longer mutates output state.
• EA PSB supplies briefly dropping output on re-enable — lager supply <net> enable on an EA PSB 10060-60 / 10080-60 caused a brief (~500ms) output drop when the output was already on. EA.enable() always ran _clear_latched_events() first, which writes OUTPut OFF and waits 200ms before turning the output back on. enable() is now idempotent: if OUTPut? reports the output is already on, the call returns immediately without toggling. The off→on path that needs latched-protection clearing is unchanged.
• lager supply <net> tui closing silently on Rigol DP821 — the supply TUI was closing after ~5 seconds with no visible error whenever a direct supply command (e.g. state) had been run beforehand. The WebSocket supply monitor on the box was opening its own pyvisa session, conflicting with the cached VISA session held by hardware_service.py on port 8080. Instruments that don’t tolerate concurrent USB sessions (Rigol DP821 reproduces this) hung silently and the TUI’s 15-second wait for supply_driver_ready always timed out. The monitor thread now releases the cached handle (via localhost:8080/cache/clear) before opening its own session. As a defensive bonus, get_channel_limits() and the session-store block now emit a visible error event on any failure during init, and the CLI captures the TUI’s exit reason and prints it red to stderr after Textual’s alt-screen tears down — so failures no longer disappear with the screen restore.

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Installation

pip install lager-cli==0.16.5

pip install --upgrade lager-cli

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Resources