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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
You need the latest version of Espruino from here: http://www.espruino.com/binaries/git/commits/master (so not just 1v89 from the website)
(give it an hour or two - looks like there are some problems with the build I need to fix)
So when you compile Espruino yourself to run natively in Linux it works? The really odd thing there is that the HTTPS code is identical in the Pico and Linux builds, so it should be doing exactly the same stuff.
Can you run the version checking code that's on http://www.espruino.com/ESP8266?
I guess it might be that your ESP8266's firmware is out of date, and it's somehow corrupting the data it sends to the server.