Is it better to get a nano esp32 or an ordinary esp32

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If the Nano form factor is not important to you then I would say get an ESP32 Dev module rather than the Nano ESP32

One reason for saying this is that the pin numbering on the Nano ESP32 is a minefield as it seems to have fallen into the trap of trying to allow for both the classic Nano pin numbering and native ESP32 pin numbering

It will also be considerably cheaper !

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