sht4x: allow to specify I2C transfer speed

Author: dshil

components/ocs_sensor/sht4x/sensor_pipeline.cpp

@@ -23,7 +23,7 @@ SensorPipeline::SensorPipeline(io::i2c::IStore& store,
     configASSERT(storage_);
 
     transceiver_ = store.add(transceiver_id_.c_str(), io::i2c::AddressLength::Bit_7,
-                             params.i2c_addr, io::i2c::TransferSpeed::Fast);
+                             params.i2c_addr, params.i2c_speed);
     configASSERT(transceiver_);
 
     sensor_.reset(new (std::nothrow) Sensor(*transceiver_, *storage_, id, params.sensor));

components/ocs_sensor/sht4x/sensor_pipeline.h

@@ -26,6 +26,9 @@ class SensorPipeline : private core::NonCopyable<> {
         //! Sensor I2C address.
         io::i2c::Address i2c_addr { 0x44 };
 
+        //! Transfer speed for I2C communication.
+        io::i2c::TransferSpeed i2c_speed { io::i2c::TransferSpeed::Fast };
+
         //! How often to read data from the sensor.
         system::Time read_interval { 0 };