@dan Updating the firmware fixed the problem! Both main.py and boot.py run on restart. Thank you :)

@formica does any other ampy action work, like 'ls' or 'ls /flash'? and the usual brute force hammer on linux, running it with sudo?

@danielm Not that I know of. Personally - but I'm no RF expert - I'd just stick the known values into an online calculator such as https://www.eeweb.com/toolbox/pi-match

@BetterAuto Fair enough. I can't add anything to this other than being mindful of power and also providing a dummy load for the antenna. We elected to have programming pins on the pcb we can use - though it means the W01 must be soldered in first of course. I would be interested in hearing how it works for you. Sounds interesting. Kind regards - Richard

@jmarcelino Thanks for the clarity on this - I'll make sure @daniel is aware of this. We'll work to make this easier for those using the reference boards. If you've got any additional points that you'd like to suggest, please let me know! I'm going to roll this up into an email, so would be good to collect these points!