Added LPS22HB (RAK-1902) sensor support (#1802)

platformio.ini

@@ -90,4 +90,5 @@ lib_deps =
   adafruit/Adafruit MCP9808 Library@^2.0.0
   adafruit/Adafruit INA260 Library@^1.5.0
   adafruit/Adafruit INA219@^1.2.0
-  adafruit/Adafruit SHTC3 Library@^1.0.0
+  adafruit/Adafruit SHTC3 Library@^1.0.0
+  adafruit/Adafruit LPS2X@^2.0.4

src/configuration.h

@@ -111,6 +111,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define QMC6310_ADDR 0x1C
 #define QMI8658_ADDR 0x6B
 #define SHTC3_ADDR 0x70
+#define LPS22HB_ADDR 0x5C
+#define LPS22HB_ADDR_ALT 0x5D
 
 // -----------------------------------------------------------------------------
 // Security

src/detect/i2cScan.h

@@ -203,6 +203,10 @@ void scanI2Cdevice(void)
             DEBUG_MSG("SHTC3 sensor found at address 0x%x\n", (uint8_t)addr);
             nodeTelemetrySensorsMap[TelemetrySensorType_SHTC3] = addr;
         }
+        if (addr == LPS22HB_ADDR || addr == LPS22HB_ADDR_ALT) {
+            DEBUG_MSG("LPS22HB sensor found at address 0x%x\n", (uint8_t)addr);
+            nodeTelemetrySensorsMap[TelemetrySensorType_LPS22] = addr;
+        }
         } else if (err == 4) {
             DEBUG_MSG("Unknow error at address 0x%x\n", addr);
         }

src/modules/Telemetry/EnvironmentTelemetry.cpp

@@ -18,6 +18,7 @@
 #include "Sensor/INA260Sensor.h"
 #include "Sensor/INA219Sensor.h"
 #include "Sensor/SHTC3Sensor.h"
+#include "Sensor/LPS22HBSensor.h"
 
 BMP280Sensor bmp280Sensor;
 BME280Sensor bme280Sensor;
@@ -26,6 +27,7 @@ MCP9808Sensor mcp9808Sensor;
 INA260Sensor ina260Sensor;
 INA219Sensor ina219Sensor;
 SHTC3Sensor shtc3Sensor;
+LPS22HBSensor lps22hbSensor;
 
 #define FAILED_STATE_SENSOR_READ_MULTIPLIER 10
 #define DISPLAY_RECEIVEID_MEASUREMENTS_ON_SCREEN true
@@ -87,6 +89,9 @@ int32_t EnvironmentTelemetryModule::runOnce()
                 result = ina219Sensor.runOnce();
             if (shtc3Sensor.hasSensor())
                 result = shtc3Sensor.runOnce();
+            if (lps22hbSensor.hasSensor()) {
+                result = lps22hbSensor.runOnce();
+            }
         }
         return result;
     } else {
@@ -204,6 +209,10 @@ bool EnvironmentTelemetryModule::sendOurTelemetry(NodeNum dest, bool wantReplies
     DEBUG_MSG("-----------------------------------------\n");
     DEBUG_MSG("Environment Telemetry: Read data\n");
 
+    if (lps22hbSensor.hasSensor())
+        lps22hbSensor.getMetrics(&m);
+    if (shtc3Sensor.hasSensor())
+        shtc3Sensor.getMetrics(&m);
     if (bmp280Sensor.hasSensor())
         bmp280Sensor.getMetrics(&m);
     if (bme280Sensor.hasSensor())
@@ -216,8 +225,6 @@ bool EnvironmentTelemetryModule::sendOurTelemetry(NodeNum dest, bool wantReplies
         ina219Sensor.getMetrics(&m);
     if (ina260Sensor.hasSensor())
         ina260Sensor.getMetrics(&m);
-    if (shtc3Sensor.hasSensor())
-        shtc3Sensor.getMetrics(&m);
 
     DEBUG_MSG("Telemetry->time: %i\n", m.time);
     DEBUG_MSG("Telemetry->barometric_pressure: %f\n", m.variant.environment_metrics.barometric_pressure);

src/modules/Telemetry/Sensor/LPS22HBSensor.cpp

@@ -0,0 +1,36 @@
+#include "../mesh/generated/telemetry.pb.h"
+#include "configuration.h"
+#include "TelemetrySensor.h"
+#include "LPS22HBSensor.h"
+#include <Adafruit_LPS2X.h>
+#include <Adafruit_Sensor.h>
+
+LPS22HBSensor::LPS22HBSensor() : 
+    TelemetrySensor(TelemetrySensorType_LPS22, "LPS22HB") 
+{
+}
+
+int32_t LPS22HBSensor::runOnce() {
+    DEBUG_MSG("Init sensor: %s\n", sensorName);
+    if (!hasSensor()) {
+        return DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS;
+    }
+    status = lps22hb.begin_I2C(nodeTelemetrySensorsMap[sensorType]);
+    return initI2CSensor();
+}
+
+void LPS22HBSensor::setup() 
+{
+    lps22hb.setDataRate(LPS22_RATE_10_HZ);
+}
+
+bool LPS22HBSensor::getMetrics(Telemetry *measurement) {
+    sensors_event_t temp;
+    sensors_event_t pressure;
+    lps22hb.getEvent(&pressure, &temp);
+
+    measurement->variant.environment_metrics.temperature = temp.temperature;
+    measurement->variant.environment_metrics.barometric_pressure = pressure.pressure;
+
+    return true;
+}    

src/modules/Telemetry/Sensor/LPS22HBSensor.h

@@ -0,0 +1,17 @@
+#include "../mesh/generated/telemetry.pb.h"
+#include "TelemetrySensor.h"
+#include <Adafruit_LPS2X.h>
+#include <Adafruit_Sensor.h>
+
+class LPS22HBSensor : virtual public TelemetrySensor {
+private:
+    Adafruit_LPS22 lps22hb;
+
+protected:
+    virtual void setup() override;
+    
+public:
+    LPS22HBSensor();
+    virtual int32_t runOnce() override;
+    virtual bool getMetrics(Telemetry *measurement) override;
+};