sensirion example, works

6 files changed, 114 insertions, 0 deletions

diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..ad61b56
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,9 @@
+[submodule "arduino-sps"]
+	path = arduino-sps
+	url = https://github.com/Sensirion/arduino-sps
+[submodule "arduino-i2c-scd4x"]
+	path = arduino-i2c-scd4x
+	url = https://github.com/Sensirion/arduino-i2c-scd4x
+[submodule "arduino-core"]
+	path = arduino-core
+	url = https://github.com/Sensirion/arduino-core
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..72d8f7e
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,11 @@
+SKETCH = main.ino
+CUSTOM_LIBS = arduino-core arduino-i2c-scd4x arduino-sps
+
+UPLOAD_PORT = /dev/ttyUSB0
+# maybe board with eink?
+BOARD = ttgo-t1
+
+ESP_ROOT = $(HOME)/Arduino/hardware/espressif/esp32/
+CHIP = esp32
+
+include $(HOME)/src/makeEspArduino/makeEspArduino.mk
diff --git a/arduino-core b/arduino-core
new file mode 160000
+Subproject 38907b450c15b6920cd35123d8d6495875f56eb
diff --git a/arduino-i2c-scd4x b/arduino-i2c-scd4x
new file mode 160000
+Subproject 59aaa4d9ce9eae00865f398c31e2a38f0832d81
diff --git a/arduino-sps b/arduino-sps
new file mode 160000
+Subproject 44645f656b93bcd6842c5f2f7ef7b2911460a1b
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);
+    }
+}