Allow for expanding the negative range

bed-presence-mk1/sensor.yaml

@@ -76,16 +76,20 @@ sensor:
     unit_of_measurement: '%'
     icon: mdi:gauge
     filters:
-      - calibrate_linear:             # scale pulses/minute to 0->100%
+      - calibrate_linear:                         # scale pulses/minute to 0->100%
           method: least_squares
           datapoints:
-            - ${calibrate_linear_100} -> 100.0         # 6800Hz (sensor shorted/0ohms)
-            - ${calibrate_linear_0} -> 0.0           # 4600Hz (breakforce/10k)
+            - ${calibrate_linear_100} -> 100.0    # 6800Hz (sensor shorted/0ohms)
+            - ${calibrate_linear_0} -> 0.0        # 4600Hz (breakforce/10k)
       - sliding_window_moving_average:
           window_size: ${averaging_window_samples}
           send_every: 1
-      - clamp:
-          min_value: 0.0
+      - lambda: |-                                # clamp to a min_value of 0 unless expand_negative_range is True
+            if (x >= 0 || id(expand_negative_range).state) {
+                return x;
+            } else {
+                return 0;
+            }
       - or:
           - delta: ${reporting_delta}             # only send if sensor changes by `reporting_delta` (eliminate sensor noise)
           - throttle: ${reporting_duration_max}   # but still update every `reporting_duration_max`
@@ -100,14 +104,13 @@ number:
     optimistic: true
     restore_value: true
     initial_value: 0
-    min_value: 0      # set to -200ish (calculate) and clamp below based on `extend_negative_range`
+    min_value: -210   # -210 == 0 pulses/minute (expand_negative_range)
     max_value: 110
     step: 1.0
     mode: box
     on_value:
       then:
         - lambda: |-  # Update status and trigger
-            // id(val_unoccupied_status_${sensor_id}).publish_state(x);
             id(update_trigger_${sensor_id})->execute();
   - platform: template
     name: ${sensor_name} Occupied Pressure
@@ -118,22 +121,21 @@ number:
     optimistic: true
     restore_value: true
     initial_value: 100
-    min_value: 0
+    min_value: -210   # -210 == 0 pulses/minute (expand_negative_range)
     max_value: 110
     step: 1.0
     mode: box
     on_value:
       then:
         - lambda: |-  # Update status and trigger
-            // id(val_occupied_status_${sensor_id}).publish_state(x);
             id(update_trigger_${sensor_id})->execute();
   - platform: template
     name: ${sensor_name} Trigger Pressure
     id: val_trigger_${sensor_id}
     optimistic: true
     restore_value: true
     initial_value: 50
-    min_value: 0
+    min_value: -210   # -210 == 0 pulses/minute (expand_negative_range)
     max_value: 110
     step: 1.0
     mode: box
@@ -165,6 +167,13 @@ button:
                                 # round to 2 decimal places
             value: !lambda return round(id(bed_sensor_${sensor_id}).state * 100)/100.0;
 
+switch:
+  - platform: template
+    name: "Clamp Negative Range"
+    id: expand_negative_range
+    optimistic: true
+    restore_mode: RESTORE_DEFAULT_OFF
+
 script:
   - id: update_trigger_${sensor_id}
     mode: queued