Add two resistors.

Wire.begin() must be called without an address to initialize ESP as I2C master.

There is not enough information here .

No, I read every word, and disagree with your reasoning.

The originator of this thread appears to not understand that Espressif is a fabless semiconductor business. Not a maker of hobbyist kits. There are already plenty of dev boards using ESP32, many of which work quite well on a breadboard. Serious consumers of ESP32 will design boards appropriate for a...

Are you expecting them to be tightly synchronized? Stereo?

I understand CSV, but the common way CSV is used is line-oriented, with a defined structure. Fields are positional, so no tagging of data type is necessary.

Now I'm curious - when would this CSV integer stuff be useful?

There is a button here to easily insert code tags, so your code is readable.

I suspect you hit a size limit writing to NVS. You should check the return value of each call to putUInt. 4 is good, 0 is error.