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hcilab / MyoStream

A reusable tool for Processing allowing the streaming of EMG data directly from the Myo armband through Bluetooth Low Energy
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Naive approach for finding armband dongle. #2

Closed aarontabor closed 7 years ago

aarontabor commented 7 years ago

The Myo armband's bluetooth dongle presents itself to the computer as a serial device. Currently, the project simply assumes that the first serial device listed is the bluetooth dongle, which is a naive approach.

While this hasn't been a problem yet (I've never had more than a single serial device connected at once), in general this could be problematic and a more intelligent selection approach should be taken. This will probably become a problem when the bluetooth dongle and MyoBoy are connected simultaneously.

aarontabor commented 7 years ago

Just tried running this project on a lab desktop. Since this computer has more than one serial device connected, the project wouldn't work unless I explicitly specified the serial port to use. In my case:

myoEmg = new MyoEMG(this, "COM3");

Not sure if we can know before-hand which port number the armband will be assigned. Maybe our best option is to iterate through all available serial ports and attempt a connection, moving on to the next after a timeout.

aarontabor commented 7 years ago

The MyoEMG class now auto-detects the correct serial port by sending discovery requests across all available serial ports and waiting for the armband to reply.

This change was added in 7b63d4e