62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
package hottisScd30
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import (
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//"log"
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"fmt"
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"bytes"
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"encoding/base64"
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"encoding/binary"
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"udi/database"
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)
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type hottisScd30Values struct {
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Status uint8
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CO2Conc int32
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Temp int32
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Hum int32
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}
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func Parse(fPort int, _ []byte, frmPayload string, variables *map[string]database.VariableType, attributes *map[string]interface{}, _ *database.Device) error {
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if fPort != 2 {
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return fmt.Errorf("Unexpected fPort %d", fPort)
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}
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b, err := base64.StdEncoding.DecodeString(frmPayload)
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if err != nil {
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return fmt.Errorf("Unable to base64-decode payload: %v", err)
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}
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var values hottisScd30Values
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err = binary.Read(bytes.NewReader(b), binary.LittleEndian, &values)
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if err != nil {
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return fmt.Errorf("Unable to cast into struct: %v", err)
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}
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var co2concentration float32 = float32(values.CO2Conc) / 100;
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var temperature float32 = float32(values.Temp) / 100;
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var humidity float32 = float32(values.Hum) / 100;
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// log.Printf("CO2: %f, Temp: %f, Hum: %f, Status: %d", co2concentration, temperature, humidity, values.Status)
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(*variables)["CO2concentration"] = database.VariableType {
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Label: "CO2concentration",
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Variable: "Concentration",
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Unit: "ppm",
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Value: co2concentration,
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}
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(*variables)["Temperature"] = database.VariableType {
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Label: "Temperature",
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Variable: "Temperature",
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Unit: "°C",
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Value: temperature,
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}
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(*variables)["Humidity"] = database.VariableType {
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Label: "Humidity",
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Variable: "Humidity",
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Unit: "%",
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Value: humidity,
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}
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(*attributes)["Status"] = values.Status
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return nil
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}
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