HealthDeskStation/main/sensirionSCD41code.ino at v1.1 · fusiandrea28/HealthDeskStation · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
void printUint16Hex(uint16_t value) // Get SCD41 serial number
{
    Serial.print(value < 4096 ? "0" : "");
    Serial.print(value < 256 ? "0" : "");
    Serial.print(value < 16 ? "0" : "");
    Serial.print(value, HEX);
}

void printSCD41SerialNo(uint16_t serial0, uint16_t serial1, uint16_t serial2) // Print SCD41 serial number to serial
{
    Serial.print("Sensirion SCD41 Serial Number: 0x");
    printUint16Hex(serial0);
    printUint16Hex(serial1);
    printUint16Hex(serial2);
    Serial.println();
}

/************************************************************************************
 ********  Read data from SCD41 Sensor
 **********************************************************************************/
void getSCD41readings()
{

	//---------------------------------------------------------------------
	//--------------------- Read SCD41 data -------------------------------
    error = scd4x.readMeasurement(co2, temperature, humidity);
    if (error) {
        Serial.print("Error trying to execute readMeasurement(): ");
        errorToString(error, errorMessage, 256);
        Serial.println(errorMessage);
    } else if (co2 == 0) {
        Serial.println("Invalid sample detected, skipping.");
    } else {
		Serial.println("Readings from SCD41:");
        Serial.print("Co2:");
        Serial.print(co2);
        Serial.print("\t");
        Serial.print("Temperature:");
        Serial.print(temperature);
        Serial.print("\t");
        Serial.print("Humidity:");
        Serial.println(humidity);
		Serial.println();

    }

}

/************************************************************************************
 ********  Initialize SCD41 Sensor
 **********************************************************************************/
void initializeSCD41()
{
	uint16_t error;
    char errorMessage[256];

    scd4x.begin(Wire);

    // stop potentially previously started measurement
    error = scd4x.stopPeriodicMeasurement();
    if (error) {
        Serial.print("Error trying to execute stopPeriodicMeasurement(): ");
        errorToString(error, errorMessage, 256);
        Serial.println(errorMessage);
    }

    uint16_t serial0;
    uint16_t serial1;
    uint16_t serial2;
    error = scd4x.getSerialNumber(serial0, serial1, serial2);
    if (error) {
        Serial.print("Error trying to execute getSerialNumber(): ");
        errorToString(error, errorMessage, 256);
        Serial.println(errorMessage);
    } else {
        printSCD41SerialNo(serial0, serial1, serial2);
    }

    // Start Measurement
    error = scd4x.startPeriodicMeasurement();
    if (error) {
        Serial.print("Error trying to execute startPeriodicMeasurement(): ");
        errorToString(error, errorMessage, 256);
        Serial.println(errorMessage);
    }

    Serial.println("SCD41 initialized successfully.");

}