This project is an Android application targeting Android 4.0 (Ice Cream Sandwitch) or above and can be found on Google Play Store. It has support for recording

• GPS location,
• GPS raw NMEA messages,
• phone battery state,
• Bluetooth Low Energy (BLE, Bluetooth 4.0) heart rate sensors,
• Android sensors like accelerometer, gyroscope, pressure, light, etc.

The data above can be saved to the file or over the network using UDP or TCP protocols. There are two recording formats allowed: a text format with a single event per line or a custom binary format. This project is actually a data acquisition tool for a sibling project press-alt which includes parser for a binary format.

This software is targeted mostly for developers or users that want to manually process and analyze sensors data.

One example could be a calculation of corrected altitude from fusion of GPS and pressure measurements. Install this app from Google Play Store, start recording and share the recorded file to your desktop (e.g. using Dropbox). It is then possible to use scripts from press-alt project. To plot GPS altitude and filtered altitude on the left axis and heart rate measurements on the right axis one could run:

$ ./analyze.py "Recording 1.bin" -1 alt_gps alt_filt -2 heart_rate

This project is a free Open Source software release under the Apache License 2.0.