Hi peter, many thanks for the answers, I’ll take a look at them and will try to fix them later in the day but I do confess I’m a newbie and it hasn’t been easy try to mod an existing design. 
As for the original firebeetle part, mine has a ESP32-WROOM-32D chip and the pinout is slightly different. I’ve searched everywhere for a similar board but none that I found is a match.
I’m adding links to the board + dfrobot website below to illustrate the differences
Best Regards,
Paulo