Add PCT2075 Temperature Sensor (#6829)

This is an I2C temperature sensor. It is intended to be a drop-in
compatible sensor for the LM75, however it is more accurate.

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

platformio.ini

@@ -161,6 +161,8 @@ lib_deps =
 	sparkfun/SparkFun MAX3010x Pulse and Proximity Sensor Library@1.1.2
 	# renovate: datasource=custom.pio depName=SparkFun 9DoF IMU Breakout ICM 20948 packageName=sparkfun/library/SparkFun 9DoF IMU Breakout - ICM 20948 - Arduino Library
 	sparkfun/SparkFun 9DoF IMU Breakout - ICM 20948 - Arduino Library@1.3.2
+	# renovate: datasource=custom.pio depName=Adafruit PCT2075 packageName=adafruit/Adafruit PCT2075
+	adafruit/Adafruit PCT2075@1.0.5
   
   ; (not included in native / portduino)
 [environmental_extra]

src/configuration.h

@@ -153,6 +153,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define CGRADSENS_ADDR 0x66
 #define LTR390UV_ADDR 0x53
 #define XPOWERS_AXP192_AXP2101_ADDRESS 0x34 // same adress as TCA8418
+#define PCT2075_ADDR 0x37
 
 // -----------------------------------------------------------------------------
 // ACCELEROMETER

src/detect/ScanI2C.h

@@ -71,6 +71,7 @@ class ScanI2C
         DPS310,
         LTR390UV,
         TCA8418KB,
+        PCT2075,
     } DeviceType;
 
     // typedef uint8_t DeviceAddress;

src/detect/ScanI2CTwoWire.cpp

@@ -434,6 +434,7 @@ void ScanI2CTwoWire::scanPort(I2CPort port, uint8_t *address, uint8_t asize)
                 SCAN_SIMPLE_CASE(MAX1704X_ADDR, MAX17048, "MAX17048", (uint8_t)addr.address);
                 SCAN_SIMPLE_CASE(DFROBOT_RAIN_ADDR, DFROBOT_RAIN, "DFRobot Rain Gauge", (uint8_t)addr.address);
                 SCAN_SIMPLE_CASE(LTR390UV_ADDR, LTR390UV, "LTR390UV", (uint8_t)addr.address);
+                SCAN_SIMPLE_CASE(PCT2075_ADDR, PCT2075, "PCT2075", (uint8_t)addr.address);
 #ifdef HAS_TPS65233
                 SCAN_SIMPLE_CASE(TPS65233_ADDR, TPS65233, "TPS65233", (uint8_t)addr.address);
 #endif

src/main.cpp

@@ -732,6 +732,7 @@ void setup()
     scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::DFROBOT_RAIN, meshtastic_TelemetrySensorType_DFROBOT_RAIN);
     scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::LTR390UV, meshtastic_TelemetrySensorType_LTR390UV);
     scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::DPS310, meshtastic_TelemetrySensorType_DPS310);
+    scannerToSensorsMap(i2cScanner, ScanI2C::DeviceType::PCT2075, meshtastic_TelemetrySensorType_PCT2075);
 
     i2cScanner.reset();
 #endif

src/modules/Telemetry/EnvironmentTelemetry.cpp

@@ -157,6 +157,13 @@ BMP3XXSensor bmp3xxSensor;
 NullSensor bmp3xxSensor;
 #endif
 
+#if __has_include(<Adafruit_PCT2075.h>)
+#include "Sensor/PCT2075Sensor.h"
+PCT2075Sensor pct2075Sensor;
+#else
+NullSensor pct2075Sensor;
+#endif
+
 RCWL9620Sensor rcwl9620Sensor;
 CGRadSensSensor cgRadSens;
 #endif
@@ -264,6 +271,8 @@ int32_t EnvironmentTelemetryModule::runOnce()
                 result = max17048Sensor.runOnce();
             if (cgRadSens.hasSensor())
                 result = cgRadSens.runOnce();
+            if (pct2075Sensor.hasSensor())
+                result = pct2075Sensor.runOnce();
                 // this only works on the wismesh hub with the solar option. This is not an I2C sensor, so we don't need the
                 // sensormap here.
 #ifdef HAS_RAKPROT
@@ -595,6 +604,10 @@ bool EnvironmentTelemetryModule::getEnvironmentTelemetry(meshtastic_Telemetry *m
         valid = valid && cgRadSens.getMetrics(m);
         hasSensor = true;
     }
+    if (pct2075Sensor.hasSensor()) {
+        valid = valid && pct2075Sensor.getMetrics(m);
+        hasSensor = true;
+    }
 #ifdef HAS_RAKPROT
     valid = valid && rak9154Sensor.getMetrics(m);
     hasSensor = true;

src/modules/Telemetry/Sensor/PCT2075Sensor.cpp

@@ -0,0 +1,35 @@
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && __has_include(<Adafruit_PCT2075.h>)
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "PCT2075Sensor.h"
+#include "TelemetrySensor.h"
+#include <Adafruit_PCT2075.h>
+
+PCT2075Sensor::PCT2075Sensor() : TelemetrySensor(meshtastic_TelemetrySensorType_PCT2075, "PCT2075") {}
+
+int32_t PCT2075Sensor::runOnce()
+{
+    LOG_INFO("Init sensor: %s", sensorName);
+    if (!hasSensor()) {
+        return DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS;
+    }
+
+    status = pct2075.begin(nodeTelemetrySensorsMap[sensorType].first, nodeTelemetrySensorsMap[sensorType].second);
+
+    return initI2CSensor();
+}
+
+void PCT2075Sensor::setup() {}
+
+bool PCT2075Sensor::getMetrics(meshtastic_Telemetry *measurement)
+{
+    measurement->variant.environment_metrics.has_temperature = true;
+
+    measurement->variant.environment_metrics.temperature = pct2075.getTemperature();
+
+    return true;
+}
+
+#endif

src/modules/Telemetry/Sensor/PCT2075Sensor.h

@@ -0,0 +1,24 @@
+#pragma once
+#include "configuration.h"
+
+#if !MESHTASTIC_EXCLUDE_ENVIRONMENTAL_SENSOR && __has_include(<Adafruit_PCT2075.h>)
+
+#include "../mesh/generated/meshtastic/telemetry.pb.h"
+#include "TelemetrySensor.h"
+#include <Adafruit_PCT2075.h>
+
+class PCT2075Sensor : public TelemetrySensor
+{
+  private:
+    Adafruit_PCT2075 pct2075;
+
+  protected:
+    virtual void setup() override;
+
+  public:
+    PCT2075Sensor();
+    virtual int32_t runOnce() override;
+    virtual bool getMetrics(meshtastic_Telemetry *measurement) override;
+};
+
+#endif