The video below shows how to connect another Arduino to do the programming. You could also use any dedicated AVR programmer you happen to have.

Using simple components and coding, this circuit provides accurate readings, making it a useful tool for electronics enthusiasts. Discover how Arduino can be used for real-time electrical ...

The Nano ESP32 supports both Micropython and Arduino programming languages, providing a clear path for those already familiar with one platform to easily switch back and forth as needed.