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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
On the STM32 I use a discovery board as an 'ST-Link', and then debug with GDB - docs here: http://www.espruino.com/AdvancedDebug
However I only do that rarely. An awful lot of Espruino can be compiled natively on Linux and debugged very easily from there - sometimes you can fudge embedded code to run straight from Linux itself. You can also get away with quite a lot by looking at the
lstfile to find out the addresses of symbols and then usingpeek32from Espruino itself to check out how those variables are changing over time.But on ESP8266 I'm not sure what's available - you'd probably need some kind of JTAG connection to it to debug properly... But my experience has been that even on relatively mature platforms, debugging tools really suck.
It might be easier for you to hack up some kind of simple 'ESP8266 test harness code' that runs on Linux and emulates the calls the ESP8266 SDK has - after all, sounds like most issues aren't XTENSA related - it's just how you interface to the API.
Nice side effect of running under Linux is that when you 'exit', Espruino can run a memory leak check that can be really handy.