If I power the Arduino Nano and ESP32-S3 from a powerbank, and in the code I send data through the same USB port, can I damage something in this case?

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if I power the Arduino Nano and ESP32-S3 from a powerbank, and in the code I send data through the same USB port, can I damage something in this case? I don't know what else to add to the question, so the description is a duplicate of the title

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No you cant.

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If I apply voltage to VIN and start programming via USB, will everything be fine?

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