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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.
@Gordon
Please could you post up the full code you used for testing, and I'll give it a try here and see if it works on a normal WiFi board.
Recent EspruinoWiFi software now uses flow control, so you'd need to have that connected to the external module as well.
Out of interest, what happened to your on-board ESP8266? It might be possible to re-flash it if it's a software issue.