I debugged my code using the WROOM32 board. It works well. Now I have made my own board and it runs ~ every tenth time. Nine out of ten it won't start. Power is good. Used 1117 as elsewhere. Filter capacitors are installed. Perhaps I need to add a capacitor or RC to the EN pin? For hardware power-up...

Is the DAC buffered by operational amplifier? What is the maximum load current this allows? Thx.