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Add particulate_matter sensor type #131

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77fba63
feat: add "particulate_matter" sensor type
s3lph Oct 5, 2025
0a61ebc
fix: remove pm0.3
s3lph Oct 5, 2025
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140 changes: 140 additions & 0 deletions 16-draft.json
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Original file line number Diff line number Diff line change
Expand Up @@ -1307,6 +1307,146 @@
]
},
"minItems": 1
},
"particulate_matter": {
"description": "Concentration of particulate matter in the air.",
"type": "array",
"items": {
"type": "object",
"properties": {
"properties": {
"type": "object",
"properties": {
"PM10": {
"description": "Concentration of particulate matter with a diameter of 10µm or less.",
"type": "object",
"properties": {
"value": {
"description": "The measurement value",
"type": "number",
"minimum": 0
},
"unit": {
"description": "The measurement unit",
"type": "string",
"enum": [
"µg/m³"
]
}
},
"required": [
"value",
"unit"
]
},
"PM4.25": {
"description": "Concentration of particulate matter with a diameter of 4.25µm or less.",
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Suggested change
"PM4.25": {
"description": "Concentration of particulate matter with a diameter of 4.25µm or less.",
"PM4": {
"description": "Concentration of particulate matter with a diameter of 4µm or less.",

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I did some online research and found that "PM4.25" seems to be an industry standard. Are you sure "PM4" isn't just an abbreviation used by your sensor?

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@mweinelt mweinelt Oct 5, 2025 •
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image

https://sensirion.com/media/documents/6791EFA0/62A1F68F/Sensirion_Datasheet_Environmental_Node_SEN5x.pdf

The actual question would be if statically defined PM sizes are adequate.

"type": "object",
"properties": {
"value": {
"description": "The measurement value",
"type": "number",
"minimum": 0
},
"unit": {
"description": "The measurement unit",
"type": "string",
"enum": [
"µg/m³"
]
}
},
"required": [
"value",
"unit"
]
},
"PM2.5": {
"description": "Concentration of particulate matter with a diameter of 2.5µm or less.",
"type": "object",
"properties": {
"value": {
"description": "The measurement value",
"type": "number",
"minimum": 0
},
"unit": {
"description": "The measurement unit",
"type": "string",
"enum": [
"µg/m³"
]
}
},
"required": [
"value",
"unit"
]
},
"PM1": {
"description": "Concentration of particulate matter with a diameter of 1µm or less.",
"type": "object",
"properties": {
"value": {
"description": "The measurement value",
"type": "number",
"minimum": 0
},
"unit": {
"description": "The measurement unit",
"type": "string",
"enum": [
"µg/m³"
]
}
},
"required": [
"value",
"unit"
]
},
"PM0.3": {
"description": "Concentration of particulate matter with a diameter of 0.3µm or less.",
"type": "object",
"properties": {
"value": {
"description": "The measurement value",
"type": "number",
"minimum": 0
},
"unit": {
"description": "The measurement unit",
"type": "string",
"enum": [
"µg/m³"
]
}
},
"required": [
"value",
"unit"
]
}
}
},
"location": {
"description": "Location the measurement relates to, e.g. <samp>Hackerspace</samp>.",
"type": "string"
},
"description": {
"description": "An extra field that you can use to attach some additional information to this sensor instance",
"type": "string"
},
"lastchange": {
"description": "The Unix timestamp (in seconds) when the sensor value changed most recently",
"type": "number"
}
},
"required": [
"properties"
]
},
"minItems": 1
}
}
},
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5 changes: 5 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -15,6 +15,10 @@ Changes should start with one of the following tags:
- [added] The `telegram` contact option was added ([#120])
- [added] The `telegram` contact option for keymasters was added ([#126])

`sensors`:

- [added] The `particulate_matter` sensor was added ([#131])

## v15

Root level:
Expand Down Expand Up @@ -126,3 +130,4 @@ Root level:
[#108]: https://github.com/SpaceApi/schema/pull/108
[#107]: https://github.com/SpaceApi/schema/pull/107
[#115]: https://github.com/SpaceApi/schema/pull/115
[#131]: https://github.com/SpaceApi/schema/pull/131