I got tired of going in and out of USB mode to transfer scripts to the card10. I also didn't want to use the more or less reliable serial connection.
This script used bluepy to open a connection and uploads the file using the same mechanism that the apps are using.
Caveats:
Linux seems to always use the slowest allowed connection speed that the device offers. This severely limits data transmission speeds with the currently released firmware. It specifies a 1 second maximum connection interval, leading to one transaction every 2 seconds. Android apparently does not care about the announced connection interval...
Needs a pairing with the Linux machine. This can be done following the steps in Documentation/bluetooth/card10.rst.
Does only work under Linux as bluepy only support Linux.
This speeds up file transfers from Linux machines. Looks like the impact
on power consumption is not too large. Android also does not seem to
take this into account.
