Added missing docs

docs/source/backends.rst

@@ -51,6 +51,7 @@ Backends
     platypush/backend/sensor.arduino.rst
     platypush/backend/sensor.battery.rst
     platypush/backend/sensor.bme280.rst
+    platypush/backend/sensor.dht.rst
     platypush/backend/sensor.distance.rst
     platypush/backend/sensor.distance.vl53l1x.rst
     platypush/backend/sensor.envirophat.rst

docs/source/platypush/backend/sensor.dht.rst

@@ -0,0 +1,5 @@
+``platypush.backend.sensor.dht``
+================================
+
+.. automodule:: platypush.backend.sensor.dht
+    :members:

docs/source/platypush/plugins/gpio.sensor.dht.rst

@@ -0,0 +1,5 @@
+``platypush.plugins.gpio.sensor.dht``
+=====================================
+
+.. automodule:: platypush.plugins.gpio.sensor.dht
+    :members:

docs/source/plugins.rst

@@ -45,6 +45,7 @@ Plugins
     platypush/plugins/gpio.sensor.rst
     platypush/plugins/gpio.sensor.accelerometer.rst
     platypush/plugins/gpio.sensor.bme280.rst
+    platypush/plugins/gpio.sensor.dht.rst
     platypush/plugins/gpio.sensor.distance.rst
     platypush/plugins/gpio.sensor.distance.vl53l1x.rst
     platypush/plugins/gpio.sensor.envirophat.rst

platypush/plugins/luma/oled.py

@@ -2,9 +2,6 @@ import enum
 import os
 from typing import Optional, Union, Tuple, List
 
-import luma.core.interface.serial
-import luma.oled.device
-from luma.core.render import canvas
 from PIL import Image, ImageFont
 
 from platypush.plugins import Plugin, action
@@ -73,6 +70,10 @@ class LumaOledPlugin(Plugin):
         :param font: Path to a default TTF font used to display the text.
         :param font_size: Font size - it only applies if ``font`` is set.
         """
+        import luma.core.interface.serial
+        import luma.oled.device
+        from luma.core.render import canvas
+
         super().__init__(**kwargs)
 
         iface_name = interface
@@ -103,6 +104,7 @@ class LumaOledPlugin(Plugin):
         """
         clear the display canvas.
         """
+        from luma.core.render import canvas
         self.device.clear()
         del self.canvas
         self.canvas = canvas(self.device)