@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!

Hi, have you find out how to discover Bluetooth Mac address? i cannot find this information nowhere. machine.unique_id and network.WLAN().mac() commands give the same mac address but if you put the device in ble advertising mode and scan the traffic with an Android app, you can see it is different from the previous ones.