I have had no issues using v91 with the included 1.6 bootloader - I have some with that, and some with 1.4, and no problems with either of them.
@DrAzzy 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.
I have had no issues using v91 with the included 1.6 bootloader - I have some with that, and some with 1.4, and no problems with either of them.