How to best handle http request errors

Ahh - yes, maybe the driver should be more aware.

If you do one command while waiting for the result of another it should throw an error, but you can definitely get into a position where you asked it to do something (like connect) and it's said OK so Espruino thinks it's not busy, and waits until CONNECT (or similar) is sent. Between OK and CONNECT it's possible you could do something else, and in that case it could fail.