https://github.com/nkolban/ESP32_Explorer

Spend some time searching GitHub

Well it would be very strange to have modules in the same reel have some with calibration data and some not so you'd only have to test one. Unless calibration hardware is fully integrated into 100% production flow it seems like a waste to do it for applications that aren't even going to use adc, whi...

That's why you need one of these: https://www.aliexpress.com/wholesale?ca ... 32+fixture

Personally I would assume that precalibrated devices are special order unless told otherwise.

Yes. There are lots of ota examples on GitHub from espressif and others.

Are you sure the first one is not a repeater (airport express, time capsule)? Have you actually tried to connect the esp32 to the second one by specifying the bssid? As you can see the 2.4ghz and 5ghz networks are not supposed to share the same bssid aka Mac address, but they are usually similar. ht...

Are you sure you have correct program port pins

https://c1.staticflickr.com/5/4721/4010 ... 65f2_b.jpg

Yes the driver handles those things internally.