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All of them are using Arduino IDE and it's libraries, so I think it's makes no difference.

@kowshik1729 Then go with a standard barrel jack, it can handle 6A.

no. we are using jumper for gpio 0th pin. please refer the below image.

@rafitc99 I have developed so many products using Arduino IDE as Programming environment as well I preferred both.. without bootloader hex files and as well with bootloader hex files... Only the thing is in industrial environment you must have good enough power supply source, extraordinary precautions for noise, emf, loose wirings, current capability of tracks of PCBs, upto mark use of necessary filters, components etc.