From: Sandy Macdonald <sandyjmacdonald@gmail.com>
Date: Sat, 8 Jun 2019 09:07:18 +0000 (+0100)
Subject: Adding a couple of new examples
X-Git-Url: https://zdv2.bktei.com/gitweb/EVA-2020-02-2.git/commitdiff_plain/a155e335d1f16716fe7c8a80491773a450c10fed?ds=sidebyside;hp=-c

Adding a couple of new examples
---

a155e335d1f16716fe7c8a80491773a450c10fed
diff --git a/examples/compensated-temperature.py b/examples/compensated-temperature.py
new file mode 100755
index 0000000..87daf97
--- /dev/null
+++ b/examples/compensated-temperature.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+
+import time
+from bme280 import BME280
+from subprocess import PIPE, Popen
+
+try:
+    from smbus2 import SMBus
+except ImportError:
+    from smbus import SMBus
+
+print("""compensated-temperature.py - Use the CPU temperature to compensate temperature
+readings from the BME280 sensor. Method adapted from Initial State's Enviro pHAT
+review: https://medium.com/@InitialState/tutorial-review-enviro-phat-for-raspberry-pi-4cd6d8c63441
+
+Press Ctrl+C to exit!
+
+""")
+
+bus = SMBus(1)
+bme280 = BME280(i2c_dev=bus)
+
+def get_cpu_temperature():
+    process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE)
+    output, _error = process.communicate()
+    return float(output[output.index('=') + 1:output.rindex("'")])
+
+factor = 0.6
+
+while True:
+    cpu_temp = get_cpu_temperature()
+    raw_temp = bme280.get_temperature()
+    comp_temp = raw_temp - ((cpu_temp - raw_temp) / factor)
+    print("Compensated temperature: {:05.2f} *C".format(comp_temp))
+    time.sleep(1.0)
diff --git a/examples/fonts/Asap/Asap-Bold.ttf b/examples/fonts/Asap/Asap-Bold.ttf
new file mode 100644
index 0000000..52a14e5
Binary files /dev/null and b/examples/fonts/Asap/Asap-Bold.ttf differ
diff --git a/examples/fonts/Asap/Asap-BoldItalic.ttf b/examples/fonts/Asap/Asap-BoldItalic.ttf
new file mode 100644
index 0000000..df29023
Binary files /dev/null and b/examples/fonts/Asap/Asap-BoldItalic.ttf differ
diff --git a/examples/fonts/Asap/Asap-Italic.ttf b/examples/fonts/Asap/Asap-Italic.ttf
new file mode 100644
index 0000000..b07a0bc
Binary files /dev/null and b/examples/fonts/Asap/Asap-Italic.ttf differ
diff --git a/examples/fonts/Asap/Asap-Medium.ttf b/examples/fonts/Asap/Asap-Medium.ttf
new file mode 100644
index 0000000..81ef310
Binary files /dev/null and b/examples/fonts/Asap/Asap-Medium.ttf differ
diff --git a/examples/fonts/Asap/Asap-MediumItalic.ttf b/examples/fonts/Asap/Asap-MediumItalic.ttf
new file mode 100644
index 0000000..6f8d906
Binary files /dev/null and b/examples/fonts/Asap/Asap-MediumItalic.ttf differ
diff --git a/examples/fonts/Asap/Asap-Regular.ttf b/examples/fonts/Asap/Asap-Regular.ttf
new file mode 100644
index 0000000..af00196
Binary files /dev/null and b/examples/fonts/Asap/Asap-Regular.ttf differ
diff --git a/examples/fonts/Asap/Asap-SemiBold.ttf b/examples/fonts/Asap/Asap-SemiBold.ttf
new file mode 100644
index 0000000..5328f3f
Binary files /dev/null and b/examples/fonts/Asap/Asap-SemiBold.ttf differ
diff --git a/examples/fonts/Asap/Asap-SemiBoldItalic.ttf b/examples/fonts/Asap/Asap-SemiBoldItalic.ttf
new file mode 100644
index 0000000..6415ef2
Binary files /dev/null and b/examples/fonts/Asap/Asap-SemiBoldItalic.ttf differ
diff --git a/examples/fonts/Asap/OFL.txt b/examples/fonts/Asap/OFL.txt
new file mode 100644
index 0000000..ad56d30
--- /dev/null
+++ b/examples/fonts/Asap/OFL.txt
@@ -0,0 +1,93 @@
+Copyright 2016 The Asap Project Authors (omnibus.type@gmail.com)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/examples/gas.py b/examples/gas.py
index 8717922..0ffe917 100755
--- a/examples/gas.py
+++ b/examples/gas.py
@@ -3,7 +3,6 @@
 import time
 from enviroplus import gas
 
-
 print("""gas.py - Print readings from the MICS6812 Gas sensor.
 
 Press Ctrl+C to exit!
diff --git a/examples/lcd.py b/examples/lcd.py
new file mode 100755
index 0000000..aa0e193
--- /dev/null
+++ b/examples/lcd.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+
+import ST7735
+from PIL import Image, ImageDraw, ImageFont
+
+print("""lcd.py - Hello, World! example on the 0.96" LCD.
+
+Press Ctrl+C to exit!
+
+""")
+
+# Create LCD class instance.
+disp = ST7735.ST7735(
+    port=0,
+    cs=1,
+    dc=9,
+    backlight=12,
+    rotation=270,
+    spi_speed_hz=10000000
+)
+
+# Initialize display.
+disp.begin()
+
+# Width and height to calculate text position.
+WIDTH = disp.width
+HEIGHT = disp.height
+
+# New canvas to draw on.
+img = Image.new('RGB', (WIDTH, HEIGHT), color=(0, 0, 0))
+draw = ImageDraw.Draw(img)
+
+# Text settings.
+font_size = 25
+font = ImageFont.truetype("fonts/Asap/Asap-Bold.ttf", font_size)
+text_colour = (255, 255, 255)
+back_colour = (0, 170, 170)
+
+message = "Hello, World!"
+size_x, size_y = draw.textsize(message, font)
+
+# Calculate text position
+x = (WIDTH - size_x) / 2
+y = (HEIGHT / 2) - (size_y / 2)
+
+# Draw background rectangle and write text.
+draw.rectangle((0, 0, 160, 80), back_colour)
+draw.text((x, y), message, font=font, fill=text_colour)
+disp.display(img)
+
+# Keep running.
+try:
+    while True:
+        pass
+
+# Turn off backlight on control-c
+except KeyboardInterrupt:
+    disp.set_backlight(0)
diff --git a/examples/light.py b/examples/light.py
index 5700eb1..216477a 100755
--- a/examples/light.py
+++ b/examples/light.py
@@ -3,7 +3,6 @@
 import time
 import ltr559
 
-
 print("""light.py - Print readings from the LTR559 Light & Proximity sensor.
 
 Press Ctrl+C to exit!
diff --git a/examples/particles.py b/examples/particulates.py
similarity index 77%
rename from examples/particles.py
rename to examples/particulates.py
index 6123ad2..99803ec 100755
--- a/examples/particles.py
+++ b/examples/particulates.py
@@ -3,8 +3,7 @@
 import time
 from pms5003 import PMS5003
 
-
-print("""particles.py - Print readings from the PM5003 Particle sensor.
+print("""particulates.py - Print readings from the PMS5003 particulate sensor.
 
 Press Ctrl+C to exit!
 
@@ -13,7 +12,6 @@ Press Ctrl+C to exit!
 pms5003 = PMS5003()
 time.sleep(1.0)
 
-
 try:
     while True:
         readings = pms5003.read()
diff --git a/examples/weather.py b/examples/weather.py
new file mode 100755
index 0000000..17aba20
--- /dev/null
+++ b/examples/weather.py
@@ -0,0 +1,28 @@
+#!/usr/bin/env python
+
+import time
+from bme280 import BME280
+
+try:
+    from smbus2 import SMBus
+except ImportError:
+    from smbus import SMBus
+
+print("""weather.py - Print readings from the BME280 weather sensor.
+
+Press Ctrl+C to exit!
+
+""")
+
+bus = SMBus(1)
+bme280 = BME280(i2c_dev=bus)
+
+while True:
+    temperature = bme280.get_temperature()
+    pressure = bme280.get_pressure()
+    humidity = bme280.get_humidity()
+    print("""Temperature: {:05.2f} *C
+Pressure: {:05.2f} hPa
+Relative humidity: {:05.2f} %
+""".format(temperature, pressure, humidity))
+    time.sleep(1)
diff --git a/library/enviroplus/gas.py b/library/enviroplus/gas.py
index 4f61940..e5fbdd9 100644
--- a/library/enviroplus/gas.py
+++ b/library/enviroplus/gas.py
@@ -20,9 +20,9 @@ class Mics6812Reading(object):
         self.nh3 = nh3
 
     def __repr__(self):
-        return """Oxidising: {:05.02f}
-Reducing: {:05.02f}
-NH3: {:05.02f}
+        return """Oxidising: {:05.02f} Ohms
+Reducing: {:05.02f} Ohms
+NH3: {:05.02f} Ohms
 """.format(self.oxidising, self.reducing, self.nh3)
 
     __str__ = __repr__