At the moment, you can't. I could add the ability to specify the raw NDEF record but there hasn't been any call for it so far. What's you use case?
@Gordon 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.
At the moment, you can't. I could add the ability to specify the raw NDEF record but there hasn't been any call for it so far. What's you use case?