@ajb2k3 On more careful inspection I see that my module is just ATOM LITE, not ATOM S3 LITE. So I have selected "ATOM" in M5Burner and then re-burned with "UIFlow_Lite" v1.11.8. However this does not appear to boot successfully, I cannot get to the >>> python prompt.
Can you comment on what is going on? Am I using the wrong firmware for an ATOM LITE? (I can revert to the ATOM S3 version, which was working fine, but I am trying to learn how to do this properly.)