The ZeroW running OpenOcd should bd able to do a complete "mass erase", which a ST-link v2.x could not, I believe...
@Rando2 started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The ZeroW running OpenOcd should bd able to do a complete "mass erase", which a ST-link v2.x could not, I believe...