81 lines
1.4 KiB
Markdown
81 lines
1.4 KiB
Markdown
# MQTT message structure
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## MSG Header
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Every message. Total len 18 bytes.
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```mermaid
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block-beta
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T["<b>TIME</b><br>4 bytes<br>seconds"]:2
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Tm["<b>TIME</b><br>4 bytes<br>useconds"]:2
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MAC["WIFI MAC<br>6 bytes"]:3
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GRP["Group id<br>4 bytes"]:2
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```
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# Block messages
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## Radar message
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Arrives every 10 seconds. Total len 49 + 18 = 67 bytes
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```mermaid
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block-beta
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MSG_HEADER
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B["0x10"]
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C["14 uint16<br>motion energy"]
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D["10 uint16<br>stationary energy"]
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```
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<br>
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## Sensors message
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Arrives every 10 seconds, when gas sensor data has been collected. Total len: 18 + 16 + 5 * number_data_pairs
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```mermaid
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block-beta
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MSG_HEADER:1
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B["0x11"]:1
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C["Pressure<br>float"]:1
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D["Temperature<br>float"]:1
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E["light<br>2 bytes"]:1
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F["humidity<br>float"]:1
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G["Number of data pairs<br>byte"]:1
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block:aa:3
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H["index 1<br>byte"]
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I["gas resistance 1<br>float"]
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J["..."]
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end
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```
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<br>
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# Notification messages
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## Pressure
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Total len: 18 + 5 = 23 bytes
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```mermaid
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block-beta
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MSG_HEADER
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B["0x01"]
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C["value<br>float"]
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```
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## Temperature
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Total len: 18 + 5 = 23 bytes
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```mermaid
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block-beta
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MSG_HEADER
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B["0x02"]
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C["value<br>float"]
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```
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## Humidity
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Total len: 18 + 5 = 23 bytes
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```mermaid
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block-beta
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MSG_HEADER
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B["0x03"]
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C["value<br>float"]
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```
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## Light
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Total len: 18 + 3 = 21 bytes
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```mermaid
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block-beta
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MSG_HEADER
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B["0x04"]
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C["value<br>2 bytes"]
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```
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