Lamp testbench in Rust around the HPCS 6500

lampbench station / export / label / tm30 / calibrate replace the Python
lamp_station.py, lamp_export.py, label_printer.py, tm30.py and
calibration.py that lived in HPCS6500-py. The driver is a submodule
(HPCS6500/, like mppt-testbench). Workspace crates: tm30 (TM-30-18 port of
colour-science 0.4.7), brother-ql (raster protocol, byte-identical to
brother_ql) and lamp-label (QR + ID labels for the QL-820NWB).

Bundles are byte-identical to lamp_export.py's (golden tests); the station
runs end to end in a test against the simulated instrument.

tests/golden/bundles/cases.json

@@ -0,0 +1,89 @@
+{
+ "measured_at": "2026-07-09T16:22:57+07:00",
+ "cases": [
+  {
+   "case": "export_avg5",
+   "readings": [
+    "r01",
+    "r04",
+    "r05",
+    "r06",
+    "r02"
+   ],
+   "meta": {
+    "name": "philips-a60",
+    "manufacturer": "Philips",
+    "model": "A60 8W 927",
+    "notes": ""
+   },
+   "supply": null
+  },
+  {
+   "case": "station_full",
+   "readings": [
+    "r05",
+    "r06",
+    "r04"
+   ],
+   "meta": {
+    "name": "L0042",
+    "ean": "8718696844984",
+    "type": "led",
+    "dimmable": false,
+    "variant": "cool white",
+    "manufacturer": "Philips",
+    "model": "MyCare 9.5W Caf\u00e9 \u00fc \u0e44\u0e1f",
+    "notes": "box says \"warm\"\tok",
+    "rated": {
+     "Phi_lm": 1050,
+     "Power_W": 9.5,
+     "lifetime_h": 15000
+    }
+   },
+   "supply": {
+    "ac_voltage": 230.0,
+    "ac_frequency": 50.0,
+    "dc_voltage": 24.0,
+    "dc_current": 5.0,
+    "mode": "AC"
+   }
+  },
+  {
+   "case": "harmonics_single",
+   "readings": [
+    "r02"
+   ],
+   "meta": {
+    "name": "L0007",
+    "ean": "",
+    "type": "halogen",
+    "dimmable": true,
+    "variant": "",
+    "manufacturer": "",
+    "model": "",
+    "notes": "",
+    "rated": {}
+   },
+   "supply": {
+    "ac_voltage": 230.0,
+    "ac_frequency": 50.0,
+    "dc_voltage": 24.0,
+    "dc_current": 5.0,
+    "mode": "AC"
+   }
+  },
+  {
+   "case": "external_power",
+   "readings": [
+    "r07"
+   ],
+   "meta": {
+    "name": "dc-strip",
+    "manufacturer": "",
+    "model": "",
+    "notes": "powered externally"
+   },
+   "supply": null
+  }
+ ]
+}

tests/golden/bundles/export_avg5/metrics.json

@@ -0,0 +1,74 @@
+{
+  "name": "philips-a60",
+  "manufacturer": "Philips",
+  "model": "A60 8W 927",
+  "notes": "",
+  "instrument": "HPCS6500",
+  "measured_at": "2026-07-09T16:22:57+07:00",
+  "instrument_date": "2026-02-04",
+  "instrument_time": "15:38:14",
+  "readings_averaged": 5,
+  "tm30": {
+    "Rf": 82.8,
+    "Rg": 102.6
+  },
+  "cri": {
+    "Ra": 83.00858001708984,
+    "R1": 82.17662658691407,
+    "R2": 93.99931488037109,
+    "R3": 93.30018768310546,
+    "R4": 76.5554412841797,
+    "R5": 81.44241180419922,
+    "R6": 89.34300079345704,
+    "R7": 83.15747680664063,
+    "R8": 64.09416198730469,
+    "R9": 4.789063262939453,
+    "R10": 84.07984313964843,
+    "R11": 76.13002166748046,
+    "R12": 60.050942993164064,
+    "R13": 86.5272430419922,
+    "R14": 96.78124694824218,
+    "R15": 75.97555694580078
+  },
+  "photometric": {
+    "Phi_lm": 480.47785034179685,
+    "eta_lm_W": 57.135939025878905,
+    "CCT_K": 5652.32763671875,
+    "Duv": 0.0055332078598439695,
+    "SDCM": 4.718670845031738,
+    "TLCI": 67.89999389648438
+  },
+  "chromaticity": {
+    "x": 0.3289025008678436,
+    "y": 0.3489073276519775,
+    "u": 0.20149995386600494,
+    "v": 0.3206336498260498,
+    "u_prime": 0.20149995386600494,
+    "v_prime": 0.48095048069953916,
+    "CIE_X": 663.1466796875,
+    "CIE_Y": 703.4814453125,
+    "CIE_Z": 649.60947265625
+  },
+  "radiometric": {
+    "Phi_e_mW": 1493.6589111328126,
+    "Phi_euv_mW": 0.0,
+    "Phi_eb_mW": 470.34068603515624,
+    "Phi_ey_mW": 681.030615234375,
+    "Phi_er_mW": 331.6043762207031,
+    "Phi_efr_mW": 11.389583778381347,
+    "Phi_eir_mW": 0.0,
+    "Phi_e_total": 1494.364990234375
+  },
+  "electrical": {
+    "Voltage_V": 230.29462585449218,
+    "Current_A": 0.06532531827688218,
+    "Power_W": 8.404675102233886,
+    "Freq_Hz": 50.02176513671875,
+    "PF": 0.5586463570594787
+  },
+  "sensor": {
+    "PeakSignal": 53125.4,
+    "DarkSignal": 2234.8,
+    "Compensate": 2834.0
+  }
+}

tests/golden/bundles/export_avg5/spd.csv

@@ -0,0 +1,351 @@
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tests/golden/bundles/export_avg5/tm30.csv

@@ -0,0 +1,17 @@
+bin,ref_a,ref_b,test_a,test_b,ref_a_norm,ref_b_norm,test_a_norm,test_b_norm,Rcs_pct,Rhs,Rf_h
+1,23.8371,4.89622,25.5118,6.79164,0.97955,0.201203,1.04837,0.279093,8.26956,0.0629661,76.4852
+2,18.6336,11.9013,19.8407,13.1208,0.842769,0.538276,0.897363,0.593431,7.60361,0.0155293,82.0527
+3,13.4292,20.7065,15.7389,20.9186,0.544131,0.839,0.637718,0.847591,5.91377,-0.0730423,81.9168
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+6,-10.215,16.7447,-9.43817,15.3233,-0.520787,0.853686,-0.48118,0.78122,-8.22583,0.00732842,85.7358
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tests/golden/bundles/external_power/metrics.json

@@ -0,0 +1,74 @@
+{
+  "name": "dc-strip",
+  "manufacturer": "",
+  "model": "",
+  "notes": "powered externally",
+  "instrument": "HPCS6500",
+  "measured_at": "2026-07-09T16:22:57+07:00",
+  "instrument_date": "2026-02-05",
+  "instrument_time": "17:57:56",
+  "readings_averaged": 1,
+  "tm30": {
+    "Rf": 82.1,
+    "Rg": 109.9
+  },
+  "cri": {
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+    "R13": 84.02236938476562,
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+    "R15": 76.29852294921875
+  },
+  "photometric": {
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+    "eta_lm_W": 0.0,
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+    "Duv": 0.002135422546416521,
+    "SDCM": 1.5234547853469849,
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+  },
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+    "CIE_Y": 267.3780212402344,
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+  },
+  "radiometric": {
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tests/golden/bundles/external_power/spd.csv

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tests/golden/bundles/external_power/tm30.csv

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tests/golden/bundles/harmonics_single/metrics.json

@@ -0,0 +1,85 @@
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tests/golden/bundles/harmonics_single/spd.csv

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tests/golden/bundles/harmonics_single/tm30.csv

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tests/golden/bundles/station_full/metrics.json

@@ -0,0 +1,90 @@
+{
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+  "ean": "8718696844984",
+  "type": "led",
+  "dimmable": false,
+  "variant": "cool white",
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+  "notes": "box says \"warm\"\tok",
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+923.30,0.629011
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+952.09,0.338755
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+961.69,0.266334
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+1044.24,0.00879848
+1046.16,0.0056708
+1048.08,0.00352862
+1050.00,0.00202557

tests/golden/bundles/station_full/tm30.csv

@@ -0,0 +1,17 @@
+bin,ref_a,ref_b,test_a,test_b,ref_a_norm,ref_b_norm,test_a_norm,test_b_norm,Rcs_pct,Rhs,Rf_h
+1,23.8357,4.89461,25.5144,6.7909,0.97956,0.20115,1.04855,0.279081,8.28657,0.0629746,76.4786
+2,18.6329,11.9004,19.8481,13.1165,0.842777,0.538263,0.897739,0.593268,7.62587,0.0151991,82.0646
+3,13.4278,20.7067,15.7532,20.9087,0.544088,0.839028,0.638313,0.847214,5.9155,-0.0737974,81.8536
+4,4.49902,22.8532,6.4428,22.2638,0.193158,0.981168,0.276612,0.955863,-0.85372,-0.0867864,85.1654
+5,-1.55064,21.4862,0.342398,19.7527,-0.0719818,0.997406,0.0158943,0.916933,-9.607,-0.0704882,81.5458
+6,-10.2152,16.7462,-9.43137,15.3167,-0.520759,0.853703,-0.4808,0.780825,-8.27966,0.00726374,85.6756
+7,-17.9011,11.6037,-17.8305,9.69668,-0.83913,0.543931,-0.835818,0.45454,-5.24169,0.072486,84.9545
+8,-24.0114,2.95619,-25.6477,-0.440784,-0.992506,0.122194,-1.06014,-0.0182197,3.89417,0.15091,72.8073
+9,-15.6788,-2.61501,-16.6028,-4.97269,-0.986375,-0.164514,-1.0445,-0.312839,8.59478,0.134135,81.8305
+10,-19.749,-11.9979,-21.092,-14.035,-0.854645,-0.519213,-0.912761,-0.607367,9.72975,0.0410105,82.054
+11,-12.8532,-18.9493,-14.4815,-19.9774,-0.561344,-0.827583,-0.632459,-0.872483,7.6843,-0.0341847,85.8291
+12,-3.73546,-20.7558,-5.08623,-20.7576,-0.177126,-0.984188,-0.241176,-0.984273,1.2579,-0.062803,90.6592
+13,1.92061,-15.8161,1.9149,-15.5855,0.120549,-0.992707,0.12019,-0.978234,-1.42652,0.00247188,91.1834
+14,12.63,-18.757,13.1517,-17.2546,0.55853,-0.829484,0.581603,-0.763042,-4.2426,0.0560974,86.4346
+15,12.1165,-8.34016,13.7212,-8.11295,0.823723,-0.566992,0.932812,-0.551545,8.21223,0.0734496,81.0338
+16,22.5956,-3.86931,23.3134,-1.5113,0.985653,-0.168785,1.01696,-0.0659251,1.06421,0.106992,79.2134

tests/station.rs

@@ -0,0 +1,203 @@
+//! The station end to end: scripted answers on stdin, the simulated
+//! instrument, a throwaway comparison-data repository.
+
+use std::io::Write;
+use std::path::Path;
+use std::process::{Command, Stdio};
+
+fn git(dir: &Path, args: &[&str]) -> String {
+    let o = Command::new("git")
+        .arg("-C")
+        .arg(dir)
+        .args(args)
+        .output()
+        .unwrap();
+    assert!(
+        o.status.success(),
+        "git {args:?}: {}",
+        String::from_utf8_lossy(&o.stderr)
+    );
+    String::from_utf8_lossy(&o.stdout).to_string()
+}
+
+/// A valid EAN-13 with the given 12 leading digits.
+fn ean(d12: &str) -> String {
+    let sum: u32 = d12
+        .chars()
+        .enumerate()
+        .map(|(i, c)| c.to_digit(10).unwrap() * if i % 2 == 1 { 3 } else { 1 })
+        .sum();
+    format!("{d12}{}", (10 - sum % 10) % 10)
+}
+
+#[test]
+fn station_measures_commits_and_re_measures() {
+    let tmp = std::env::temp_dir().join(format!("lampbench-station-{}", std::process::id()));
+    let _ = std::fs::remove_dir_all(&tmp);
+    let repo = tmp.join("comparison-data");
+    std::fs::create_dir_all(repo.join("lamps")).unwrap();
+    git(&repo, &["init", "-q"]);
+    git(&repo, &["config", "user.name", "Test"]);
+    git(&repo, &["config", "user.email", "test@example.com"]);
+    std::fs::write(repo.join("README.md"), "data\n").unwrap();
+    git(&repo, &["add", "."]);
+    git(&repo, &["commit", "-qm", "init"]);
+
+    // --interval 0.5 keeps the runs in different seconds, so the re-measure changes measured_at
+    let internal = ean("200123456789");
+    let answers = [
+        // lamp 1: no barcode
+        "",
+        "philips",    // manufacturer -> canonical "Philips"
+        "Test A60",   // model
+        "",           // type: led
+        "y",          // dimmable
+        "Warm White", // variant -> lower case
+        "",           // notes
+        "806",
+        "2700",
+        "8.5",
+        "",
+        "",
+        "60", // rated: flux, CCT, W, Ra, lifetime, equivalent
+        "",   // insert the lamp
+        // lamp 2: retailer-internal EAN (no online lookup)
+        &internal,
+        "",
+        "Shop bulb",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        // re-measure lamp 1, everything pre-filled
+        "L0001",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        "",
+        // a bad barcode, then quit
+        "12345",
+        "q",
+    ]
+    .join("\n")
+        + "\n";
+
+    let mut child = Command::new(env!("CARGO_BIN_EXE_lampbench"))
+        .args([
+            "station",
+            "--simulate",
+            "--settle",
+            "0",
+            "--readings",
+            "2",
+            "--interval",
+            "0.5",
+            "--no-push",
+            "--no-labels",
+            "--no-lookup",
+        ])
+        .arg("--data-repo")
+        .arg(&repo)
+        .arg("--cache")
+        .arg(tmp.join("ean-cache.json"))
+        .env_remove("HPCS_LABEL_PRINTER")
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .unwrap();
+    child
+        .stdin
+        .take()
+        .unwrap()
+        .write_all(answers.as_bytes())
+        .unwrap();
+    let out = child.wait_with_output().unwrap();
+    let text = String::from_utf8_lossy(&out.stdout);
+    assert!(
+        out.status.success(),
+        "{text}\n{}",
+        String::from_utf8_lossy(&out.stderr)
+    );
+    assert!(text.contains("--- New lamp L0001 ---"), "{text}");
+    assert!(
+        text.contains("Using canonical brand name: Philips") || text.contains("Manufacturer"),
+        "{text}"
+    );
+    assert!(
+        text.contains("Lookup: ? / ?  (retailer-internal barcode, not resolvable)"),
+        "{text}"
+    );
+    assert!(text.contains("Re-measuring L0001"), "{text}");
+    assert!(text.contains("Not a valid EAN-13/UPC-A: '12345'"), "{text}");
+    assert!(text.contains("PSU off"), "{text}");
+    assert!(text.trim_end().ends_with("Bye."), "{text}");
+
+    let m: serde_json::Value = serde_json::from_str(
+        &std::fs::read_to_string(repo.join("lamps/L0001/metrics.json")).unwrap(),
+    )
+    .unwrap();
+    assert_eq!(m["manufacturer"], "Philips");
+    assert_eq!(m["variant"], "warm white");
+    assert_eq!(m["dimmable"], true);
+    assert_eq!(m["type"], "led");
+    assert_eq!(
+        m["rated"],
+        serde_json::json!({"Phi_lm": 806, "CCT_K": 2700, "Power_W": 8.5, "W_equiv": 60})
+    );
+    assert_eq!(m["readings_averaged"], 2);
+    assert_eq!(m["supply"]["ac_voltage"], 230.0);
+    let m2: serde_json::Value = serde_json::from_str(
+        &std::fs::read_to_string(repo.join("lamps/L0002/metrics.json")).unwrap(),
+    )
+    .unwrap();
+    assert_eq!(m2["ean"], internal.as_str());
+    assert_eq!(m2["notes"], "retailer-internal barcode, brand unknown");
+    assert_eq!(
+        std::fs::read_to_string(repo.join("lamps/L0001/spd.csv"))
+            .unwrap()
+            .lines()
+            .count(),
+        351
+    );
+    assert_eq!(
+        std::fs::read_to_string(repo.join("lamps/L0001/tm30.csv"))
+            .unwrap()
+            .lines()
+            .count(),
+        17
+    );
+
+    let log = git(&repo, &["log", "--format=%s"]);
+    let subjects: Vec<&str> = log.lines().collect();
+    assert_eq!(
+        subjects[0], "Re-measure lamp L0001 (Philips, Test A60, warm white)",
+        "{log}"
+    );
+    assert_eq!(
+        subjects[1],
+        format!("Add lamp L0002 (Shop bulb, EAN {internal})"),
+        "{log}"
+    );
+    assert_eq!(
+        subjects[2], "Add lamp L0001 (Philips, Test A60, warm white)",
+        "{log}"
+    );
+    let _ = std::fs::remove_dir_all(&tmp);
+}