Add Input: VEML7700 Ambient Light Sensor (#1491)

Author: kizniche

CHANGELOG.md

@@ -40,6 +40,7 @@ sudo service mycodoflask restart
  - Add Input: ENS160 ([#1434](https://github.com/kizniche/Mycodo/pull/1434))
  - Add Output: Waveshare 8-Channel Raspberry Pi Relay Board B ([#1434](https://github.com/kizniche/Mycodo/pull/1434))
  - Add Function: Camera: rpicam ([#1487](https://github.com/kizniche/Mycodo/pull/1487))
+ - Add Input: VEML7700 Ambient Light Sensor ([#1491](https://github.com/kizniche/Mycodo/pull/1491))
 
 ### Miscellaneous
 

mycodo/inputs/veml7700.py

@@ -0,0 +1,79 @@
+# coding=utf-8
+import copy
+import time
+
+from mycodo.inputs.base_input import AbstractInput
+
+# Measurements
+measurements_dict = {
+    0: {
+        'measurement': 'light',
+        'unit': 'lux'
+    }
+}
+
+# Input information
+INPUT_INFORMATION = {
+    'input_name_unique': 'VEML7700',
+    'input_manufacturer': 'VISHAY',
+    'input_name': 'VEML7700',
+    'input_library': 'adafruit-circuitpython-veml7700',
+    'measurements_name': 'Light',
+    'measurements_dict': measurements_dict,
+    'url_datasheet': 'https://www.vishay.com/docs/84286/veml7700.pdf',
+    'url_product_purchase': 'https://www.adafruit.com/product/4162',
+
+    'options_enabled': [
+        'i2c_location',
+        'period',
+        'pre_output'
+    ],
+    'options_disabled': ['interface'],
+
+    'dependencies_module': [
+        ('pip-pypi', 'usb.core', 'pyusb==1.1.1'),
+        ('pip-pypi', 'adafruit_extended_bus', 'Adafruit-extended-bus==1.0.2'),
+        ('pip-pypi', 'adafruit_veml7700', 'adafruit-circuitpython-veml7700==2.2.0')
+    ],
+
+    'interfaces': ['I2C'],
+    'i2c_location': ['0x10'],
+    'i2c_address_editable': False
+}
+
+
+
+class InputModule(AbstractInput):
+    """A sensor support class that monitors the DS18B20's lux."""
+    def __init__(self, input_dev, testing=False):
+        super().__init__(input_dev, testing=testing, name=__name__)
+
+        self.sensor = None
+
+        if not testing:
+            self.try_initialize()
+
+    def initialize(self):
+        import adafruit_veml7700
+        from adafruit_extended_bus import ExtendedI2C
+
+        self.sensor = adafruit_veml7700.VEML7700(
+            ExtendedI2C(self.input_dev.i2c_bus),
+            address=int(str(self.input_dev.i2c_location), 16))
+
+    @property
+    def lux(self):
+        """VEML7700 luminosity in lux."""
+        if self._measurements is None:  # update if needed
+            self.read()
+        return self._measurements
+
+    def get_measurement(self):
+        """Gets the VEML7700's lux."""
+        self.return_dict = copy.deepcopy(measurements_dict)
+
+        lux = self.sensor.light
+
+        self.value_set(0, lux)
+
+        return self.return_dict