You are reading a single comment by @Lucie and its replies.
Click here to read the full conversation.
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.
@Lucie
This is quite a common problem especially these days with so many modular components and boards made. It means that people with very little knowledge of electronics are able to get into developing their own cool projects just by connecting preassembled boards together and not realising that they need common ground.