Outdoor temp hum compensation

airgradient-open-air-o-1pst.yaml

@@ -5,7 +5,7 @@
 substitutions:
   name: "ag-open-air-o-1pst"
   friendly_name: "AG Open Air O-1PST"
-  config_version: 2.0.0
+  config_version: 2.0.1
   name_add_mac_suffix: "false"  # Must have quotes around value
 
 # Enable Home Assistant API

packages/sensor_pms5003t.yaml

@@ -7,23 +7,23 @@ sensor:
     pm_2_5:
       name: "PM 2.5"
       id: pm_2_5
-      device_class: pm25  # Added to report properly to HomeKit
+      device_class: pm25  # Added to report properly to Homekit
       filters:
         - sliding_window_moving_average:
             window_size: 30
             send_every: 30
     pm_1_0:
       name: "PM 1.0"
       id: pm_1_0
-      device_class: pm1  # Added to report properly to HomeKit
+      device_class: pm1  # Added to report properly to Homekit
       filters:
         - sliding_window_moving_average:
             window_size: 30
             send_every: 30
     pm_10_0:
       name: "PM 10.0"
       id: pm_10_0
-      device_class: pm10  # Added to report properly to HomeKit
+      device_class: pm10  # Added to report properly to Homekit
       filters:
         - sliding_window_moving_average:
             window_size: 30
@@ -39,13 +39,25 @@ sensor:
       name: "Temperature"
       id: temp
       filters:
+          # https://www.airgradient.com/blog/slr-temperature-example/
+          # - lambda: return (x - 4.55) / 0.83;  # Once the negative number issue fix is merged in https://github.com/esphome/issues/issues/3814
+        - lambda: !lambda |-
+            // Fix negative values for now
+            if (x > 6000) {
+              return (x - 6553.6 - 4.55) / 0.83;
+            }
+            return (x - 4.55) / 0.83;
         - sliding_window_moving_average:
             window_size: 30
             send_every: 30
     humidity:
       name: "Humidity"
       id: humidity
       filters:
+          # https://www.airgradient.com/blog/linear-regression-improves-sensor-accuracy/
+        # - lambda: return x * 1.500574 - 4.76;
+          # https://forum.airgradient.com/t/open-air-outdoor-air-quality-monitor-humidity-readings-are-off/1171/2
+        - lambda: return x * 1.3921 - 1.0245;
         - sliding_window_moving_average:
             window_size: 30
             send_every: 30
@@ -60,7 +72,7 @@ sensor:
     icon: "mdi:air-filter"
     accuracy_decimals: 0
     filters:
-      - skip_initial: 10  # Need valid data from PM 2.5 sensor before able to calculate
+      - skip_initial: 1  # Need valid data from PM 2.5 sensor before able to calculate
     lambda: |-
       // https://en.wikipedia.org/wiki/Air_quality_index#Computing_the_AQI
       // Borrowed from https://github.com/kylemanna/sniffer/blob/master/esphome/sniffer_common.yaml

packages/sensor_pms5003t_extended_life.yaml

@@ -7,24 +7,38 @@ sensor:
     pm_2_5:
       name: "PM 2.5"
       id: pm_2_5
-      device_class: pm25  # Added to report properly to HomeKit
+      device_class: pm25  # Added to report properly to Homekit
     pm_1_0:
       name: "PM 1.0"
       id: pm_1_0
-      device_class: pm1  # Added to report properly to HomeKit
+      device_class: pm1  # Added to report properly to Homekit
     pm_10_0:
       name: "PM 10.0"
       id: pm_10_0
-      device_class: pm10  # Added to report properly to HomeKit
+      device_class: pm10  # Added to report properly to Homekit
     pm_0_3um:
       name: "PM 0.3"
       id: pm_0_3um
     temperature:
       name: "Temperature"
       id: temp
+      filters:
+          # https://www.airgradient.com/blog/slr-temperature-example/
+          # - lambda: return (x - 4.55) / 0.83;  # Once the negative number issue fix is merged in https://github.com/esphome/issues/issues/3814
+        - lambda: !lambda |-
+            // Fix negative values for now
+            if (x > 6000) {
+              return (x - 6553.6 - 4.55) / 0.83;
+            }
+            return (x - 4.55) / 0.83;
     humidity:
       name: "Humidity"
       id: humidity
+      filters:
+          # https://www.airgradient.com/blog/linear-regression-improves-sensor-accuracy/
+        # - lambda: return x * 1.500574 - 4.76;
+          # https://forum.airgradient.com/t/open-air-outdoor-air-quality-monitor-humidity-readings-are-off/1171/2
+        - lambda: return x * 1.3921 - 1.0245;
     update_interval: 2min
 
 
@@ -37,7 +51,7 @@ sensor:
     icon: "mdi:air-filter"
     accuracy_decimals: 0
     filters:
-      - skip_initial: 10  # Need valid data from PM 2.5 sensor before able to calculate
+      - skip_initial: 1  # Need valid data from PM 2.5 sensor before able to calculate
     lambda: |-
       // https://en.wikipedia.org/wiki/Air_quality_index#Computing_the_AQI
       // Borrowed from https://github.com/kylemanna/sniffer/blob/master/esphome/sniffer_common.yaml

packages/sensor_pms5003t_uncorrected.yaml

@@ -0,0 +1,90 @@
+sensor:
+  - platform: pmsx003
+    # Default interval of updating every second, but using an average over the last 30 seconds/readings
+    # PMS5003T with temperature and humidity https://esphome.io/components/sensor/pmsx003.html
+    type: PMS5003T
+    uart_id: pms5003_uart
+    pm_2_5:
+      name: "PM 2.5"
+      id: pm_2_5
+      device_class: pm25  # Added to report properly to Homekit
+      filters:
+        - sliding_window_moving_average:
+            window_size: 30
+            send_every: 30
+    pm_1_0:
+      name: "PM 1.0"
+      id: pm_1_0
+      device_class: pm1  # Added to report properly to Homekit
+      filters:
+        - sliding_window_moving_average:
+            window_size: 30
+            send_every: 30
+    pm_10_0:
+      name: "PM 10.0"
+      id: pm_10_0
+      device_class: pm10  # Added to report properly to Homekit
+      filters:
+        - sliding_window_moving_average:
+            window_size: 30
+            send_every: 30
+    pm_0_3um:
+      name: "PM 0.3"
+      id: pm_0_3um
+      filters:
+        - sliding_window_moving_average:
+            window_size: 30
+            send_every: 30
+    temperature:
+      name: "Temperature"
+      id: temp
+      filters:
+        - sliding_window_moving_average:
+            window_size: 30
+            send_every: 30
+    humidity:
+      name: "Humidity"
+      id: humidity
+      filters:
+        - sliding_window_moving_average:
+            window_size: 30
+            send_every: 30
+
+
+  - platform: template
+    # Depends on another sensor providing an ID of pm_2_5 such as a pms5003
+    name: "PM 2.5 AQI"
+    id: pm_2_5_aqi
+    update_interval: 5 min
+    unit_of_measurement: "AQI"
+    icon: "mdi:air-filter"
+    accuracy_decimals: 0
+    filters:
+      - skip_initial: 1  # Need valid data from PM 2.5 sensor before able to calculate
+    lambda: |-
+      // https://en.wikipedia.org/wiki/Air_quality_index#Computing_the_AQI
+      // Borrowed from https://github.com/kylemanna/sniffer/blob/master/esphome/sniffer_common.yaml
+      if (id(pm_2_5).state <= 12.0) {
+      // good
+      return((50.0 - 0.0) / (12.0 - 0.0) * (id(pm_2_5).state - 0.0) + 0.0);
+      } else if (id(pm_2_5).state <= 35.4) {
+      // moderate
+      return((100.0 - 51.0) / (35.4 - 12.1) * (id(pm_2_5).state - 12.1) + 51.0);
+      } else if (id(pm_2_5).state <= 55.4) {
+      // usg
+      return((150.0 - 101.0) / (55.4 - 35.5) * (id(pm_2_5).state - 35.5) + 101.0);
+      } else if (id(pm_2_5).state <= 150.4) {
+      // unhealthy
+      return((200.0 - 151.0) / (150.4 - 55.5) * (id(pm_2_5).state - 55.5) + 151.0);
+      } else if (id(pm_2_5).state <= 250.4) {
+      // very unhealthy
+      return((300.0 - 201.0) / (250.4 - 150.5) * (id(pm_2_5).state - 150.5) + 201.0);
+      } else if (id(pm_2_5).state <= 350.4) {
+      // hazardous
+      return((400.0 - 301.0) / (350.4 - 250.5) * (id(pm_2_5).state - 250.5) + 301.0);
+      } else if (id(pm_2_5).state <= 500.4) {
+      // hazardous 2
+      return((500.0 - 401.0) / (500.4 - 350.5) * (id(pm_2_5).state - 350.5) + 401.0);
+      } else {
+      return(500);
+      }