Please can you post up some minimal example code that does this? Espruino will happily serve up pictures/etc that contain basically random characters, so I'd imagine it is something in the code.
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.
(Thanks for sticking the post in here!)
Please can you post up some minimal example code that does this? Espruino will happily serve up pictures/etc that contain basically random characters, so I'd imagine it is something in the code.