read an high precision adc like hx711

I just tried. values read with espruino are more stable, but still much less stable than the arduino values.
the signal sent on sck is very fast. sck high time is 1,5 microsecond.
but those burst are composed by much faster high/low very small bursts, and seems to confuse the hx711.
So this is not precise enough for me, until I have a solution like arduino, that will sent stable precise bursts.
anyway, thanks for your help.