You are reading a single comment by @Spocki 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.
@Spocki
I have the Heltec, too. Could never get them to work (changed 3V3 and 5V, with or without pullups).