My pico ist unable to activate the bootloader to upgrade the firmware 1.93 to 1.99

Tue 2018.10.02

Hello @jm, how are you attempting the upgrade? It is straight forward using the IDE.

http://www.espruino.com/Pico

Under heading 'Firmware Updates'

We'd strongly recommend that you use the Web IDE to update the firmware on this board - See >The Download page for instructions.

http://www.espruino.com/Download#flashin­g

Locate the link 'Web IDE' for the quickest method.

If this is the method you attempted, what OS are you using, (e.g.Windows10 Mac etc.) and what is the version of the IDE? Native app or Chrome WebIDE?


What is the URL of the instructions you used and what is the paragraph that gave you the first indication that you were stuck?


Are you using a USB cable or a USB-TTL converter?