tests: Add calibration test to temperature comparison.

tests/scenarios/board_temperature_comparison.yaml

@@ -100,6 +100,82 @@ tests:
     expect_true: true
     mode: [hardware]
 
+  - name: "Offset-align all sensors to WSEN-HIDS reference"
+    action: hardware_script
+    script: |
+      import sys
+      sys.path.insert(0, '/remote/hts221')
+      sys.path.insert(0, '/remote/wsen-hids')
+      sys.path.insert(0, '/remote/wsen-pads')
+      sys.path.insert(0, '/remote/lis2mdl')
+
+      from machine import I2C
+      from time import sleep_ms
+
+      i2c = I2C(1)
+
+      # Initialize all sensors
+      from wsen_hids.device import WSEN_HIDS
+      ref = WSEN_HIDS(i2c)
+
+      from hts221.device import HTS221
+      hts = HTS221(i2c)
+      hts.poweroff()
+      sleep_ms(20)
+      hts.poweron()
+      sleep_ms(50)
+
+      from wsen_pads.device import WSEN_PADS
+      pads = WSEN_PADS(i2c)
+
+      from lis2mdl.device import LIS2MDL
+      mag = LIS2MDL(i2c)
+
+      # Read reference just before each sensor to minimize drift
+      ref_t = ref.temperature()
+      hts_t = hts.temperature()
+
+      ref_t2 = ref.temperature()
+      pads_t = pads.temperature()
+
+      ref_t3 = ref.temperature()
+      mag_t = mag.read_temperature_c()
+
+      print('--- Before offset alignment ---')
+      print('  WSEN-HIDS (ref): ' + str(round(ref_t, 2)) + ' C')
+      print('  HTS221:          ' + str(round(hts_t, 2)) + ' C')
+      print('  WSEN-PADS:       ' + str(round(pads_t, 2)) + ' C')
+      print('  LIS2MDL:         ' + str(round(mag_t, 2)) + ' C')
+
+      spread_before = max(hts_t, pads_t, mag_t, ref_t) - min(hts_t, pads_t, mag_t, ref_t)
+      print('  Spread: ' + str(round(spread_before, 2)) + ' C')
+
+      # Apply offset to align each sensor to the reference reading
+      hts.set_temp_offset(ref_t - hts_t)
+      pads.set_temp_offset(ref_t2 - pads_t)
+      mag.set_temp_offset(ref_t3 - mag_t)
+
+      # Re-read after offset alignment
+      sleep_ms(50)
+      ref_t4 = ref.temperature()
+      hts_t2 = hts.temperature()
+      pads_t2 = pads.temperature()
+      mag_t2 = mag.read_temperature_c()
+
+      print('--- After offset alignment ---')
+      print('  WSEN-HIDS (ref): ' + str(round(ref_t4, 2)) + ' C')
+      print('  HTS221:          ' + str(round(hts_t2, 2)) + ' C')
+      print('  WSEN-PADS:       ' + str(round(pads_t2, 2)) + ' C')
+      print('  LIS2MDL:         ' + str(round(mag_t2, 2)) + ' C')
+
+      spread_after = max(hts_t2, pads_t2, mag_t2, ref_t4) - min(hts_t2, pads_t2, mag_t2, ref_t4)
+      print('  Spread: ' + str(round(spread_after, 2)) + ' C')
+
+      # After alignment, spread should be < 2°C
+      result = spread_after < 2.0
+    expect_true: true
+    mode: [hardware]
+
   - name: "Temperature values feel correct"
     action: manual
     prompt: "Les températures lues sont-elles cohérentes entre elles et avec l'ambiance ?"