You seem to be mixing SDK 1.5.3 and lwip from SDK 1.5.0. YMMV...
@tve 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.
You seem to be mixing SDK 1.5.3 and lwip from SDK 1.5.0. YMMV...