Install bluez which comes with gatttool and hciscan.
sudo apt-get install bluez
sudo apt-get install git
git clone https://github.com/Quiri/polar
cd polar
Put on the device and look for it's MAC address. You can use
sudo hcitool lescan
or use the the scan script to scan for devices for 10 seconds and print the unique MAC addresses to stdout.
.\scan
Start logging by:
./start MAC hciX > your_file &
where hciX is the hci address of your bluetooth dongle. Often its hci0 for the first, hci1 for the second dongle and so on.
End logging with
./stop MAC >> your_file
This logs the heartrate notifications and the start and end system time. The second hex number is the heart rate.
If you want to start logging multiple devices simultaneously, you can use the startall script. It takes MAC addresses as input and the directory to write the logs to as a parameter. If directory does not exist, it will be created. The logfile have the names MACaddress.csv.
Scan MAC addr. and start logging for all found devices:
./scan | /.startall .
Start all from a file:
# Make a file with MAC addresses, e.g. scan it or write it:
./scan > MACaddr
nano MACaddr
# Start from file, write to directory test1/group1:
cat MACaddr | ./startall test1/group1
#or
./startall test1/group1 < MACaddr
Stop all logging activity with
./killall
which is basically just the
kill `pgrep gatttool`
command.
If you run into problems with scan (I/O error or similar) you can run
.\repair
to kill all scan processes and restart the bluetooth devices (hci).