does this eliminate need for ftd_sio or similar? collaborate with insulaudit?
I noticed you try to go directly via USB, without loading ftdi_sio module, or obtaining a serial device. Do you not need the serial (/dev/ttyUSB0?)
Can I include your sources in insulaudit: https://github.com/bewest/insulaudit? See also https://github.com/bewest/decoding-carelink/blob/rewriting/analysis/bewest-pump/ReadHistoryData-page-13.data.list_opcodes.markdown#record-5-bolus-2012-12-07t164716-head4-body0-op0x01 if you are a pump user.