As suggested here, maybe it helps to activate Packet receipt notification procedure and/or lower the number of packets (default is 12, see this link).
To adjust, go to nRF Toolbox -> DFU -> 3 dots top right -> Settings
Yes, it works! Great. I missed that solution while searching in the forum.
Thank you so much!
PS. I activated "Packet receipt notification" and set 5 as number of packets
@emanuele 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.
As suggested here, maybe it helps to activate Packet receipt notification procedure and/or lower the number of packets (default is 12, see this link).
To adjust, go to nRF Toolbox -> DFU -> 3 dots top right -> Settings