dweet fix again

app/controller/drivers/adafruit/examples/google_spreadsheet.py

@@ -0,0 +1,131 @@
+#!/usr/bin/python
+
+# Google Spreadsheet DHT Sensor Data-logging Example
+
+# Depends on the 'gspread' and 'oauth2client' package being installed.  If you 
+# have pip installed execute:
+#   sudo pip install gspread oauth2client
+
+# Also it's _very important_ on the Raspberry Pi to install the python-openssl
+# package because the version of Python is a bit old and can fail with Google's
+# new OAuth2 based authentication.  Run the following command to install the
+# the package:
+#   sudo apt-get update
+#   sudo apt-get install python-openssl
+
+# Copyright (c) 2014 Adafruit Industries
+# Author: Tony DiCola
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+import json
+import sys
+import time
+import datetime
+
+import Adafruit_DHT
+import gspread
+from oauth2client.client import SignedJwtAssertionCredentials
+
+# Type of sensor, can be Adafruit_DHT.DHT11, Adafruit_DHT.DHT22, or Adafruit_DHT.AM2302.
+DHT_TYPE = Adafruit_DHT.DHT22
+
+# Example of sensor connected to Raspberry Pi pin 23
+DHT_PIN  = 23
+# Example of sensor connected to Beaglebone Black pin P8_11
+#DHT_PIN  = 'P8_11'
+
+# Google Docs OAuth credential JSON file.  Note that the process for authenticating
+# with Google docs has changed as of ~April 2015.  You _must_ use OAuth2 to log
+# in and authenticate with the gspread library.  Unfortunately this process is much
+# more complicated than the old process.  You _must_ carefully follow the steps on
+# this page to create a new OAuth service in your Google developer console:
+#   http://gspread.readthedocs.org/en/latest/oauth2.html
+#
+# Once you've followed the steps above you should have downloaded a .json file with
+# your OAuth2 credentials.  This file has a name like SpreadsheetData-<gibberish>.json.
+# Place that file in the same directory as this python script.
+#
+# Now one last _very important_ step before updating the spreadsheet will work.
+# Go to your spreadsheet in Google Spreadsheet and share it to the email address
+# inside the 'client_email' setting in the SpreadsheetData-*.json file.  For example
+# if the client_email setting inside the .json file has an email address like:
+#   149345334675-md0qff5f0kib41meu20f7d1habos3qcu@developer.gserviceaccount.com
+# Then use the File -> Share... command in the spreadsheet to share it with read
+# and write acess to the email address above.  If you don't do this step then the
+# updates to the sheet will fail!
+GDOCS_OAUTH_JSON       = 'your SpreadsheetData-*.json file name'
+
+# Google Docs spreadsheet name.
+GDOCS_SPREADSHEET_NAME = 'your google docs spreadsheet name'
+
+# How long to wait (in seconds) between measurements.
+FREQUENCY_SECONDS      = 30
+
+
+def login_open_sheet(oauth_key_file, spreadsheet):
+	"""Connect to Google Docs spreadsheet and return the first worksheet."""
+	try:
+		json_key = json.load(open(oauth_key_file))
+		credentials = SignedJwtAssertionCredentials(json_key['client_email'], 
+													json_key['private_key'], 
+													['https://spreadsheets.google.com/feeds'])
+		gc = gspread.authorize(credentials)
+		worksheet = gc.open(spreadsheet).sheet1
+		return worksheet
+	except Exception as ex:
+		print 'Unable to login and get spreadsheet.  Check OAuth credentials, spreadsheet name, and make sure spreadsheet is shared to the client_email address in the OAuth .json file!'
+		print 'Google sheet login failed with error:', ex
+		sys.exit(1)
+
+
+print 'Logging sensor measurements to {0} every {1} seconds.'.format(GDOCS_SPREADSHEET_NAME, FREQUENCY_SECONDS)
+print 'Press Ctrl-C to quit.'
+worksheet = None
+while True:
+	# Login if necessary.
+	if worksheet is None:
+		worksheet = login_open_sheet(GDOCS_OAUTH_JSON, GDOCS_SPREADSHEET_NAME)
+
+	# Attempt to get sensor reading.
+	humidity, temp = Adafruit_DHT.read(DHT_TYPE, DHT_PIN)
+
+	# Skip to the next reading if a valid measurement couldn't be taken.
+	# This might happen if the CPU is under a lot of load and the sensor
+	# can't be reliably read (timing is critical to read the sensor).
+	if humidity is None or temp is None:
+		time.sleep(2)
+		continue
+
+	print 'Temperature: {0:0.1f} C'.format(temp)
+	print 'Humidity:    {0:0.1f} %'.format(humidity)
+ 
+	# Append the data in the spreadsheet, including a timestamp
+	try:
+		worksheet.append_row((datetime.datetime.now(), temp, humidity))
+	except:
+		# Error appending data, most likely because credentials are stale.
+		# Null out the worksheet so a login is performed at the top of the loop.
+		print 'Append error, logging in again'
+		worksheet = None
+		time.sleep(FREQUENCY_SECONDS)
+		continue
+
+	# Wait 30 seconds before continuing
+	print 'Wrote a row to {0}'.format(GDOCS_SPREADSHEET_NAME)
+	time.sleep(FREQUENCY_SECONDS)