===== Open Med Sensor =====

{{:project:8032319169_c24a1c1749.jpg|(screenshot)}}

Trying to open proprietary medical sensors and connect them to the Internet.

Connecting a personal medical sensor device to the Internet enables storing measurements over time (compared to a single measurement displayed on the device display). A connected sensor is thus more valuable than a stand-alone device. Connected sensors do exist, but are often quite expensive. On the other hand, Bluetooth modules and Bluetooth enabled Smartphones are readily available and can act as a cheap gateway to the Internet.

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[Oct 2012] "voodoo" interface, oscilloscope measurement:

{{http://farm9.staticflickr.com/8328/8123487561_d63bc55c0c.jpg}}{{http://farm9.staticflickr.com/8184/8123487703_5e39fb802c_m.jpg}}

[Nov 2012] intercepting the i2c bus:

{{http://farm9.staticflickr.com/8487/8162713640_c12a911361_n.jpg}}{{http://farm9.staticflickr.com/8350/8162713504_3a08bf3bc3_n.jpg}}
{{http://farm9.staticflickr.com/8345/8204837900_f07ca73a19.jpg}}{{http://farm9.staticflickr.com/8066/8203747069_d44e3bb210_n.jpg}}

[Nov 2012] talking to the EEPROM (i2c multi master setup):

{{http://farm9.staticflickr.com/8058/8204835280_d754bb6a99_n.jpg}}{{http://farm9.staticflickr.com/8205/8203744859_243db62196_n.jpg}}
===== Hardware =====

  * Weinberger KP-6241 (CHF 25 at Media Markt)
  * BlueSMIRF Bluetooth Module (https://www.sparkfun.com/products/582)
  * Arduino Nano
  * Nexus S Android Smartphone with Bluetooth, Wifi, 3G

===== Tasks =====

  * Open the medical sensor device housing [DONE]
  * Find a way to intercept data sent to LCD display [DONE]
  * Detect signals sent to LCD display with multimeter [DONE]
  * Detect signals sent to LCD with oscilloscope [DONE Oct 2012]
  * Attach wires to LCD display, to do the measurement with an Arduino [DONE Oct 2012]
  * Decode communication protocol between device and LCD display [FAILED Oct 2012]
  * Attach wires to i2c test points SCL and SDA [DONE Nov 2012]
  * Decode signals sent over i2c when storing measurements with protocol sniffer [DONE Nov 2012]
  * Read values with Arduino via i2c from EEPROM [DONE Nov 2012]
  * Setup Bluetooth module to send measurements from Arduino [DONE]
  * Receive measurements sent via Bluetooth with (Windows) Laptop [DONE]
  * Receive measurements sent via Bluetooth with Android [DONE]
  * Make measurements available on the Internet [TODO]
  * Plan B: use OCR (e.g. [[https://developers.google.com/google-apps/documents-list/#uploading_documents_using_optical_character_recognition_ocr|this Google API]]) to read med device display with Android camera [TODO]
  * Integrate parts, add portable battery [TODO]
  * Repackage device [TODO]
===== Tools =====
  * Screwdriver
  * Multimeter
  * Soldering Iron
  * A Physics Lab… [post event note ;)]
  * Oscilloscope [Oct 2012]
  * Logic Analyzer [Nov 2012]
===== Team =====

  * [[https://twitter.com/#!/drdol|@drdol]]
  * [[https://twitter.com/#!/der_graf|@der_graf]]
  * [[https://twitter.com/#!/frescosecco|@frescosecco]]
  * Jonas
  * [[https://twitter.com/#!/tamberg|@tamberg]]
===== Code =====

  * [[https://bitbucket.org/tamberg/makeopendata/src/985cb4beb9df/2012/OpenMedSensor/BtSoftwareSerial/BtSoftwareSerial.ino|BtSoftwareSerial.ino]] (Send data via Bluetooth from Arduino)
===== Links =====

  * http://make.opendata.ch/forum/discussion/57/open-data-for-your-health#Item_12
  * http://quo.vadis.stojkovic.ch/hacking-a-weighing-scale/ (How to scrape an LCD display)
  * http://en.esskabel.de/adapter/datasheet/ada-flex-30p-050-set/266 (FFC adapter board, not used)
  * http://arduino.cc/playground/Code/I2CEEPROM
  * http://www.instructables.com/id/Weather-proof-Bluetooth-capable-RFID-reader/step2/Configure-the-BlueSmirf-module-via-USB/
  * http://developer.android.com/guide/topics/connectivity/bluetooth.html
  * http://www.flickr.com/photos/tamberg/sets/72157631641565782/ (all pictures CC-BY-SA)
  * http://www.azumio.com/apps/heart-rate/

{{tag>status:demo health hardware needs:design needs:expert}}