OpenEVSE ESP32 fix for occasional weird behaviour

I have an old OpenEVSE wall unit that I upgraded to ESP32 from the shop. It worked OK but required power cycling about twice a month when acting oddly for no obvious cause. I decided to try adding some additional smoothing to the supply rail and fitted a small circuit board with 47uF and 100nF caps. It is now three months on and I no longer have to revive the unit by power cycling.

Maybe this could be of use to others.

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Thanks for the feedback, are the extra caps added to the 12v input or on the 3.3v power lines?

I cut the output from the 12V – 5V DC to DC module close to the ESP 32 and added a small strip board with screw termination and extra caps on the 5V rail.

@glyn.hudson FYI