Hi @bkrajendra , Thanks for your feedback, Ameba D by default uses custom sprintf implementation in its ROM, thus it doesn't support all format specifier such as %lf etc. This is so to save memory and ...

I will need to purchase an ESP8266 and explore this further. I've had a lot of problems with this library and ESP in general. Also - doesn't the ESP core already provide a printf? I think that was a ...