On Linux, you can get what you describe if some application is already connected to the com port - it happens if I accidentally leave minicom open in the background for instance.
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.
Glad it's sorted!
On Linux, you can get what you describe if some application is already connected to the com port - it happens if I accidentally leave minicom open in the background for instance.
Could it have been something like that?