Diff: TempSensor.h

Revision:

0:680362180482

Child:

1:b99360c421a7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TempSensor.h	Thu Mar 14 12:40:38 2019 +0000
@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2017-2019 Future Electronics
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef TEMP_SENSOR_H_
+#define TEMP_SENSOR_H_
+
+#include <stdint.h>
+#include "Sensor.h"
+#include "Hs3001Driver.h"
+
+/** Tempereature Sensor based on HS3001 chip
+ */
+class TempSensor : public Sensor<int16_t> {
+public:
+    /** Create and initialize sensor interface.
+     *
+     * @param spi SPI bus to use
+     * @param cs CS/SS pin to use to select sensor on a bus
+     */
+    TempSensor(I2C &i2c, uint8_t address) : _driver(i2c, address) {}
+
+    /** Schedule measurement process.
+     */
+    virtual void start(EventQueue& ev_queue)
+    {
+        // start new measurement cycle
+        _driver.start_conversion();
+        // set up updater() function to be called every second (1000ms)
+        ev_queue.call_every(1000, callback(this, &TempSensor::updater));
+    }
+
+protected:
+    void updater()
+    {
+        uint16_t humidity;
+        int16_t temperature;
+
+        // read last measured temperature value and update
+        // characteristic value if new value is available
+        if (_driver.read(humidity, temperature) == Hs3001Driver::STATUS_OK) {
+            update_value(temperature);
+        }
+
+        // start new measurement cycle
+        _driver.start_conversion();
+    }
+
+    Hs3001Driver _driver;
+};
+
+#endif // TEMP_SENSOR_H_