Add google docs spreadsheet update example.

Author: root

examples/google_spreadsheet.py

@@ -0,0 +1,90 @@
+#!/usr/bin/python
+
+# Google Spreadsheet BMP Sensor Data-logging Example
+
+# Depends on the 'gspread' package being installed.  If you have pip installed
+# execute:
+#   sudo pip install gspread
+
+# 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 sys
+import time
+import datetime
+
+import Adafruit_BMP.BMP085 as BMP085
+import gspread
+
+# Google Docs account email, password, and spreadsheet name.
+GDOCS_EMAIL            = 'your google docs account email address'
+GDOCS_PASSWORD         = 'your google docs account password'
+GDOCS_SPREADSHEET_NAME = 'your google docs spreadsheet name'
+
+# How long to wait (in seconds) between measurements.
+FREQUENCY_SECONDS      = 30
+
+
+def login_open_sheet(email, password, spreadsheet):
+	"""Connect to Google Docs spreadsheet and return the first worksheet."""
+	try:
+		gc = gspread.login(email, password)
+		worksheet = gc.open(spreadsheet).sheet1
+		return worksheet
+	except:
+		print 'Unable to login and get spreadsheet.  Check email, password, spreadsheet name.'
+		sys.exit(1)
+
+
+# Create sensor instance with default I2C bus (On Raspberry Pi either 0 or
+# 1 based on the revision, on Beaglebone Black default to 1).
+bmp = BMP085.BMP085()
+
+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_EMAIL, GDOCS_PASSWORD, GDOCS_SPREADSHEET_NAME)
+
+	# Attempt to get sensor readings.
+	temp = bmp.read_temperature()
+	pressure = bmp.read_pressure()
+	altitude = bmp.read_altitude()
+
+	print 'Temperature: {0:0.1f} C'.format(temp)
+	print 'Pressure:    {0:0.1f} Pa'.format(pressure)
+	print 'Altitude:    {0:0.1f} m'.format(altitude)
+ 
+	# Append the data in the spreadsheet, including a timestamp
+	try:
+		worksheet.append_row((datetime.datetime.now(), temp, pressure, altitude))
+	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)