Install the driver that corresponds to the UART converter on your Arduino board (most often it is CH341) PHOTOS CH340/CH341: https://photos.app.goo.gl/UCcCsbAV8xmNvmeJ6 Atmega 16U2: https://photos.app.goo.gl/PJ5sAfesATTE11dLA CP210x: https://photos.app.goo.gl/Jf8ZZ8DAEY4jRVrW6 FT230/FT232: https://photos.app.goo.gl/BjQz3aPjs5s8FrxRA , https://photos.app.goo.gl/RnQ98aeU4nT2xd99A