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Add temp/humidity compensation algorithms #29

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Add temp/humidity compensation algorithms #29

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24 changes: 24 additions & 0 deletions air-gradient-open-air.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -541,11 +541,23 @@ sensor:
id: pm1_temperature
name: "${upper_devicename} Temperature (1)"
disabled_by_default: true
filters:
# https://forum.airgradient.com/t/outdoor-temperature-and-humidity-reading-correction/1544/19
- lambda: !lambda |-
// Remove line with (x > 6000) once the negative number issue fix is merged in https://github.com/esphome/issues/issues/3814
if (x > 6000) return ((x - 6553.6) * 1.327) - 6.738;
if (x < 10.0) return (x * 1.327) - 6.738;
return (x * 1.181) - 5.113;
humidity:
id: pm1_humidity
accuracy_decimals: 1
name: "${upper_devicename} Relative Humidity (1)"
disabled_by_default: true
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;

- platform: pmsx003
type: PMS5003T
Expand Down Expand Up @@ -583,11 +595,23 @@ sensor:
id: pm2_temperature
name: "${upper_devicename} Temperature (2)"
disabled_by_default: true
filters:
# https://forum.airgradient.com/t/outdoor-temperature-and-humidity-reading-correction/1544/19
- lambda: !lambda |-
// Remove line with (x > 6000) once the negative number issue fix is merged in https://github.com/esphome/issues/issues/3814
if (x > 6000) return ((x - 6553.6) * 1.327) - 6.738;
if (x < 10.0) return (x * 1.327) - 6.738;
return (x * 1.181) - 5.113;
humidity:
id: pm2_humidity
accuracy_decimals: 1
name: "${upper_devicename} Relative Humidity (2)"
disabled_by_default: true
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;

# Calculate the average values across both PMS5003T sensors
- platform: template
Expand Down