Google Docs and Backup
For a while it seemed that google docs / drive didn’t have a rollback function. But at least for Google Docs it has a revision history! But still – local and real backups are recommended.
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Editing Google Docs (Even Shared) using Python
A couple of hacking sessions later and it works. Essentially the documentation leaves some to wish for but essentially the basics is covered by the github-example. Which is not really an example by any mean, but its as good as it gets. Firstly a few concepts: The meta data is what matters and especially the
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Raspberry Pi and Google Sheets
Trying hard to push data onto an ordinary Google Doc, but apparently it is much more common to use sheets. Other than that, the main problem was getting the OAuth2 in place. But it works. http://gspread.readthedocs.org/en/latest/oauth2.html from time import sleep from oauth2client.client import SignedJwtAssertionCredentials import RPi.GPIO as GPIO import gspread import json #Google Sheets GDOCS_CRED
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Bluetooth
It looked simple enough from the start – but there are many caveats with the HC-06 BT module. First of all the one I had needed 3.3v rather than 5v. The Rx line needed a voltage divider – so it was not only to plug in directly. Then the trickiest part was to determine the
Sound Experiment
Since the Arduino UNO has very limited RAM we need to put the data somewhere. The Catalex MicroSD card reader provides us with the storage we need, is relatively cheap and sold at Kjell o Co (The MicroSD cards on the other hand might be a tad expensive). The second thing we need is an
ESP8266 – Sending Data
http://www.instructables.com/id/Send-sensor-data-DHT11-BMP180-to-ThingSpeak-with-a/?ALLSTEPS Ahhh, so it seems that the AT+CIOBAUD command has been replaced with AT+IPR instead. Will have a look at that later. Other data sending resource with examples: http://tomeko.net/other/ESP8266/
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Arduino UNO and ESP8266 Experiments
This is not an easy task, but it explains the basics for setting up a wireless network through Arduino. Basically there are a two sites that when combined gives the right information: http://www.instructables.com/id/Using-the-ESP8266-module/?ALLSTEPS http://shin-ajaran.blogspot.se/2014/12/noobs-guide-to-esp8266-with-arduino.html The 3.3v seems to work fine and the module looks happy. The output isn’t spot perfect so there might be some
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Pulse Sensor
The next item on the list is a pulse sensor from pulsesensor.com. Easy to connect with the Arduino UNO and it works out of the box. It is rather sensitive, so hold it gently against the index finger – do not push it as that will stop the blood flow! If the serial is being
Little Bits
In physical interaction design it is essential to get a craftsmanship feeling for the interaction – how does the button feel to press, what happens when the artifact is touched, how responsive is the slider and how does it fit in, etc. An easy toolkit to get started with building basic mockups for the simplest
Raspberry PI
Downloaded small footprint Minibian and Used Win 32 Disk Imager to put it onto an SD card. Realized that the device had to be registered for the network. Eeehk. Ok, it boots at least. Apparently it is quite possible to control an Arduino board from a RPI. This way one can use python rather than