Closes #724 - Add SGP30 to offline mode

Author: tyeth

src/components/i2c/controller.cpp

@@ -223,6 +223,11 @@ static const std::map<std::string, FnCreateI2CDriver> I2cFactory = {
         const char *driver_name) -> drvBase * {
        return new drvScd30(i2c, addr, mux_channel, driver_name);
      }},
+     {"sgp30",
+      [](TwoWire *i2c, uint16_t addr, uint32_t mux_channel,
+         const char *driver_name) -> drvBase * {
+        return new drvSgp30(i2c, addr, mux_channel, driver_name);
+      }},
     {"sgp40",
      [](TwoWire *i2c, uint16_t addr, uint32_t mux_channel,
         const char *driver_name) -> drvBase * {

src/components/i2c/controller.h

@@ -50,6 +50,7 @@
 #include "drivers/drvScd30.h"
 #include "drivers/drvScd4x.h"
 #include "drivers/drvSen5x.h"
+#include "drivers/drvSgp30.h"
 #include "drivers/drvSgp40.h"
 #include "drivers/drvSht3x.h"
 #include "drivers/drvSht4x.h"

src/components/i2c/drivers/drvSgp30.h

@@ -0,0 +1,104 @@
+/*!
+ * @file drvSgp30.h
+ *
+ * Device driver for the SGP30 VOC/gas sensor.
+ *
+ * Adafruit invests time and resources providing this open source code,
+ * please support Adafruit and open-source hardware by purchasing
+ * products from Adafruit!
+ *
+ * Copyright (c) Tyeth Gundry 2025 for Adafruit Industries.
+ *
+ * MIT license, all text here must be included in any redistribution.
+ *
+ */
+
+#ifndef DRV_SGP30_H
+#define DRV_SGP30_H
+
+#include "drvBase.h"
+#include <Adafruit_SGP30.h>
+#include <Wire.h>
+
+/**************************************************************************/
+/*!
+    @brief  Class that provides a driver interface for the SGP30 sensor.
+*/
+/**************************************************************************/
+class drvSgp30 : public drvBase {
+public:
+  /*******************************************************************************/
+  /*!
+      @brief    Constructor for a SGP30 sensor.
+      @param    i2c
+                The I2C interface.
+      @param    sensorAddress
+                7-bit device address.
+      @param    mux_channel
+                The I2C multiplexer channel.
+      @param    driver_name
+                The name of the driver.
+  */
+  /*******************************************************************************/
+  drvSgp30(TwoWire *i2c, uint16_t sensorAddress, uint32_t mux_channel,
+           const char *driver_name)
+      : drvBase(i2c, sensorAddress, mux_channel, driver_name) {
+    // Initialization handled by drvBase constructor
+  }
+
+  /*******************************************************************************/
+  /*!
+      @brief    Initializes the SGP30 sensor and begins I2C.
+      @returns  True if initialized successfully, False otherwise.
+  */
+  /*******************************************************************************/
+  bool begin() override {
+    _sgp30 = new Adafruit_SGP30();
+    if (!_sgp30->begin(_i2c)) {
+      return false;
+    }
+
+    // TODO: update to use setCalibration() and pass in temp/humidity
+
+    return true;
+  }
+
+  /*******************************************************************************/
+  /*!
+      @brief    Gets the sensor's current equivalent/estimated CO2 value.
+      @param    co2Event
+                Pointer to an Adafruit_Sensor event.
+      @returns  True if the temperature was obtained successfully, False
+                otherwise.
+  */
+  /*******************************************************************************/
+  bool getEventECO2(sensors_event_t *co2Event) {
+    bool result = _sgp30->IAQmeasure();
+    if (result) {
+      co2Event->eCO2 = (float)_sgp30->eCO2;
+    }
+    return result;
+  }
+
+  /*******************************************************************************/
+  /*!
+      @brief    Gets the SGP30's current VOC reading.
+      @param    vocIndexEvent
+                  Adafruit Sensor event for VOC Index (1-500, 100 is normal)
+      @returns  True if the sensor value was obtained successfully, False
+                otherwise.
+  */
+  /*******************************************************************************/
+  bool getEventVOCIndex(sensors_event_t *vocIndexEvent) {
+    bool result = _sgp30->IAQmeasure();
+    if (result) {
+      vocIndexEvent->voc_index = (float)_sgp30->TVOC;
+    }
+    return result;
+  }
+
+protected:
+  Adafruit_SGP30 *_sgp30; ///< SGP30 driver object
+};
+
+#endif // WipperSnapper_I2C_Driver_SGP30

src/components/i2c/drivers/drvSgp40.h

@@ -92,7 +92,7 @@ class drvSgp40 : public drvBase {
   }
 
 protected:
-  Adafruit_SGP40 *_sgp40; ///< SEN5X driver object
+  Adafruit_SGP40 *_sgp40; ///< SGP40 driver object
 };
 
-#endif // WipperSnapper_I2C_Driver_SEN5X
+#endif // WipperSnapper_I2C_Driver_SGP40