@robert-hh Unfortunately not although I have converted the code to Arduino C++ and used it on an Adafruit Feather with no problem.

To fix this, change the options in PyMakr to "Safe boot before upload".

@crumble That's a shame. It just means I have to write a connector on the server. I wonder how it's implmented with the Pybytes!

@robert-hh I had to connect G23 with GND as per the update process. The update failed 3 more times with the bash script but the last one using windows seems to have worked. Someone needs to work on the bash script! Many thanks for the help.

@papasmurph Exactly. I've been trying to use a complex exponential relationship with some empirically based factors but because I have different types of device, the relative numbers between device types are awful. The simplest approach is the best so far!