Add detection framework for multiple AirQuality sensors

src/detect/ScanI2C.cpp

@@ -41,6 +41,12 @@ ScanI2C::FoundDevice ScanI2C::firstAccelerometer() const
     return firstOfOrNONE(9, types);
 }
 
+ScanI2C::FoundDevice ScanI2C::firstAQI() const
+{
+    ScanI2C::DeviceType types[] = {PMSA0031, SCD4X};
+    return firstOfOrNONE(2, types);
+}
+
 ScanI2C::FoundDevice ScanI2C::firstRGBLED() const
 {
     ScanI2C::DeviceType types[] = {NCP5623, LP5562};
@@ -80,4 +86,4 @@ bool ScanI2C::DeviceAddress::operator<(const ScanI2C::DeviceAddress &other) cons
         || (port != NO_I2C && other.port != NO_I2C && (address < other.address));
 }
 
-ScanI2C::FoundDevice::FoundDevice(ScanI2C::DeviceType type, ScanI2C::DeviceAddress address) : type(type), address(address) {}
+ScanI2C::FoundDevice::FoundDevice(ScanI2C::DeviceType type, ScanI2C::DeviceAddress address) : type(type), address(address) {}

src/detect/ScanI2C.h

@@ -127,6 +127,8 @@ class ScanI2C
 
     FoundDevice firstAccelerometer() const;
 
+    FoundDevice firstAQI() const;
+
     FoundDevice firstRGBLED() const;
 
     virtual FoundDevice find(DeviceType) const;

src/main.cpp

@@ -195,6 +195,8 @@ ScanI2C::DeviceAddress rtc_found = ScanI2C::ADDRESS_NONE;
 ScanI2C::DeviceAddress accelerometer_found = ScanI2C::ADDRESS_NONE;
 // The I2C address of the RGB LED (if found)
 ScanI2C::FoundDevice rgb_found = ScanI2C::FoundDevice(ScanI2C::DeviceType::NONE, ScanI2C::ADDRESS_NONE);
+/// The I2C address of our Air Quality Indicator (if found)
+ScanI2C::DeviceAddress aqi_found = ScanI2C::ADDRESS_NONE;
 
 #ifdef T_WATCH_S3
 Adafruit_DRV2605 drv;
@@ -622,6 +624,9 @@ void setup()
 
     pmu_found = i2cScanner->exists(ScanI2C::DeviceType::PMU_AXP192_AXP2101);
 
+    auto aqiInfo = i2cScanner->firstAQI();
+    aqi_found = aqiInfo.type != ScanI2C::DeviceType::NONE ? aqiInfo.address : ScanI2C::ADDRESS_NONE;
+
 /*
  * There are a bunch of sensors that have no further logic than to be found and stuffed into the
  * nodeTelemetrySensorsMap singleton. This wraps that logic in a temporary scope to declare the temporary field
@@ -690,6 +695,7 @@ void setup()
     scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::DPS310, meshtastic_TelemetrySensorType_DPS310);
     scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::RAK12035, meshtastic_TelemetrySensorType_RAK12035);
     scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::PCT2075, meshtastic_TelemetrySensorType_PCT2075);
+    scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::SCD4X, meshtastic_TelemetrySensorType_SCD4X);
 
     i2cScanner.reset();
 #endif

src/main.h

@@ -35,6 +35,7 @@ extern bool kb_found;
 extern ScanI2C::DeviceAddress rtc_found;
 extern ScanI2C::DeviceAddress accelerometer_found;
 extern ScanI2C::FoundDevice rgb_found;
+extern ScanI2C::DeviceAddress aqi_found;
 
 extern bool eink_found;
 extern bool pmu_found;
@@ -92,4 +93,4 @@ void scannerToSensorsMap(const std::unique_ptr<ScanI2CTwoWire> &i2cScanner, Scan
 #endif
 
 // We default to 4MHz SPI, SPI mode 0
-extern SPISettings spiSettings;
+extern SPISettings spiSettings;