Added NRF/RAK support for env plugin (#1133)

* Added NRF/RAK support for env plugin

* Added Environmental mixin to platform io

src/plugins/EnvironmentalMeasurementPlugin.h

@@ -0,0 +1,44 @@
+#pragma once
+#include "../mesh/generated/environmental_measurement.pb.h"
+#include "ProtobufPlugin.h"
+#include <DHT.h>
+#include <DS18B20.h>
+#include <OLEDDisplay.h>
+#include <OLEDDisplayUi.h>
+#include <OneWire.h>
+#include <Adafruit_Sensor.h>
+#include <Adafruit_BME280.h>
+
+class EnvironmentalMeasurementPlugin : private concurrency::OSThread, public ProtobufPlugin<EnvironmentalMeasurement>
+{
+  public:
+    EnvironmentalMeasurementPlugin()
+        : concurrency::OSThread("EnvironmentalMeasurementPlugin"),
+          ProtobufPlugin("EnvironmentalMeasurement", PortNum_ENVIRONMENTAL_MEASUREMENT_APP, &EnvironmentalMeasurement_msg)
+    {
+        lastMeasurementPacket = nullptr;
+    }
+    virtual bool wantUIFrame();
+    virtual void drawFrame(OLEDDisplay *display, OLEDDisplayUiState *state, int16_t x, int16_t y);
+
+  protected:
+    /** Called to handle a particular incoming message
+    @return true if you've guaranteed you've handled this message and no other handlers should be considered for it
+    */
+    virtual bool handleReceivedProtobuf(const MeshPacket &mp, EnvironmentalMeasurement *p);
+    virtual int32_t runOnce();
+    /**
+     * Send our EnvironmentalMeasurement into the mesh
+     */
+    bool sendOurEnvironmentalMeasurement(NodeNum dest = NODENUM_BROADCAST, bool wantReplies = false);
+
+  private:
+    float CelsiusToFarenheit(float c);
+    bool firstTime = 1;
+    DHT *dht;
+    OneWire *oneWire;
+    DS18B20 *ds18b20;
+    Adafruit_BME280 bme;
+    const MeshPacket *lastMeasurementPacket;
+    uint32_t sensor_read_error_count = 0;
+};