From cdd4f766759f8a8e1ea36c6524895714099d2f38 Mon Sep 17 00:00:00 2001
From: dakkar <dakkar@thenautilus.net>
Date: Fri, 28 Jan 2022 15:16:38 +0000
Subject: sensirion example, works

---
 main.ino | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 main.ino

(limited to 'main.ino')

diff --git a/main.ino b/main.ino
new file mode 100644
index 0000000..bc27deb
--- /dev/null
+++ b/main.ino
@@ -0,0 +1,94 @@
+#include <Arduino.h>
+#include <SensirionI2CScd4x.h>
+#include <Wire.h>
+
+SensirionI2CScd4x scd4x;
+
+void printUint16Hex(uint16_t value) {
+    Serial.print(value < 4096 ? "0" : "");
+    Serial.print(value < 256 ? "0" : "");
+    Serial.print(value < 16 ? "0" : "");
+    Serial.print(value, HEX);
+}
+
+void printSerialNumber(uint16_t serial0, uint16_t serial1, uint16_t serial2) {
+    Serial.print("Serial: 0x");
+    printUint16Hex(serial0);
+    printUint16Hex(serial1);
+    printUint16Hex(serial2);
+    Serial.println();
+}
+
+void setup() {
+
+    Serial.begin(115200);
+    while (!Serial) {
+        delay(100);
+    }
+
+    Wire.begin(21,22);
+
+    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 {
+        printSerialNumber(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("Waiting for first measurement... (5 sec)");
+}
+
+void loop() {
+    uint16_t error;
+    char errorMessage[256];
+
+    delay(5000);
+
+    // Read Measurement
+    uint16_t co2 = 0;
+    float temperature = 0.0f;
+    float humidity = 0.0f;
+    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.print("Co2:");
+        Serial.print(co2);
+        Serial.print("\t");
+        Serial.print("Temperature:");
+        Serial.print(temperature);
+        Serial.print("\t");
+        Serial.print("Humidity:");
+        Serial.println(humidity);
+    }
+}
-- 
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