Waveform isn't in v 1.48 - see http://www.espruino.com/ChangeLog - it wasn't added until 1.53, and in versions since then, there have been considerable improvements made to it.
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.
Waveform isn't in v 1.48 - see http://www.espruino.com/ChangeLog - it wasn't added until 1.53, and in versions since then, there have been considerable improvements made to it.