Help running espruino on the F401 Nucleo

It is probably because the IDE times out waiting for the process.env data at 9600 baud.

@asez73 since you have a hex editor running, could you just:

• Open up the official firmware I linked
  
• Change 00 80 01 20 AD D2 02 00 to 00 80 01 20 AD D2 02 08 (so the 8th byte from 00 to 08)
  
• Try and flash again with the mbed bootloader and see if it works?