Arduino uno r4 wifi cannot connected into wifi

Hardware UNO R4 UNO R4 WiFi
1

my arduino can't connect into wifi if i use power external 5v into Vin pin, and if i use usb for the supply, the arduino can connect to wifi

2

Hi @jansen_cristantio. From the "Tech Specs" tab of the UNO R4 WiFi board's documentation:

https://docs.arduino.cc/hardware/uno-r4-wifi/#tech-specs
Input voltage (VIN) 6-24 V

So it is expected that the board won't work properly when powered via the Vin pin at 5 V. You must use a sufficient power supply.

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