Is the IR3000 FC adapter reachable and a Fluke 287/289 attached and on? Adapter address, firmware and battery %; meter model, firmware, serial, battery, memory level and clock; the number of saved items. meter.attached false = the adapter is not on a powered meter. NOT_FOUND = the adapter is not advertising (press its button until the LED flashes green; close Fluke Connect on any phone).

One snapshot of the meter display: function (V_DC, OHMS ...), secondary function, range and autorange, modes (HOLD, MIN_MAX_AVG, REL, RECORD ...), the primary reading and every other reading on screen (MINIMUM, MAXIMUM, AVERAGE, SECONDARY, REL_REFERENCE ...). value is in SI base units, display is the text the meter shows. METER_BUSY = a menu or result page is open.

Collect real-time readings from the adapter (about 4 per second) for count readings or seconds, and return a summary instead of the readings: count, rate, first/last time, min/max/mean of the primary value per unit, the function(s) and unit(s) seen and the last 5 readings. Default: 20 readings. For longer runs or a file use log_start.

What is saved in the meter's memory: the counts and every saved measurement, MIN MAX session, peak session and trend recording (name, time, function, primary value and the other readings; recordings also interval, number of records and duration). download_recording fetches the records of a recording; the index is the item's index within its kind.

Download trend recording index (see memory) to a CSV or JSONL file, one row per record (start/end time, primary, minimum, average, maximum, unit, states). Long recordings take minutes over Bluetooth. Returns the file, the number of records, seconds per record, retries and the recording header. An interrupted download resumes with start and the same out (a failed result names both under resume).

Simulate front-panel keys in order (soft keys F1-F4 under the display, the arrows, HOLD, MINMAX, RANGE, INFO, BACKLIGHT, ONOFF) and return the display state after each key. held: a long press (RANGE held = back to autorange). ONOFF switches the meter OFF for good (it cannot be switched on remotely, and the adapter goes to sleep with it): it is refused unless allow_off is true; the meter then asks for confirmation (F1 confirms, F4 cancels).

Send read-only remote commands to the meter and return each answer (text, or hex for binary replies): ID (model, firmware, serial), IM, and Q* queries such as QM (primary measurement), QDDB (display data), QBL (battery), QSLS (saved counts), QMP . Anything else (PRESS, MP, CSD, RI, OFF ...) is refused with UNSAFE_OPERATION before it reaches the meter.

Read-only health check of adapter, link and meter: adapter advertising, connection, meter attached, adapter firmware, ID, display snapshot, a live reading within 5 s, adapter and meter battery. Never changes the meter. SELFTEST_FAILED lists the failed checks (measured vs expected).

Start logging live readings to a CSV or JSONL file in the background and return the job id and the file. The log ends after duration, at log_stop, or when the Bluetooth link stays lost longer than reconnect_for; it keeps running if this client disconnects. One log at a time, and meanwhile the other meter tools return BUSY. Follow it with log_status, end it with log_stop.

State of a background log (running / done / failed), the records written so far, the last status line, the file, and once it has ended its summary (min/max/mean per unit, link gaps).

Stop the background log cleanly and return its summary: file, records, duration, min/max/mean per unit, link gaps. Without job it also stops a log or live started elsewhere (a terminal, another client); already_ended true = the log had ended before this call (the summary is its old one).